ABOUT LAMBDA

History

Type Description Date
new
FIRAS Line Intensities from Fixsen et al. 1999
Intensities for 19 spectral lines, including C+ 158 μm and N+ 205 μm. More info...
2022-05-24
new
CMB and Radio Monopole Spectrum
A plot of the CMB and radio monopole spectrum has been added to the LAMBDA graphics pages. More info...
2022-03-23
new
EDA2 159 MHz map
The Engineering Development Array 2 159 MHz radio continuum map is now available on LAMBDA. More info...
2022-02-18
new
BICEP/Keck October 2021 data products
BICEP/Keck October 2021 data products, including spectra, likelihoods, chains files, and more, are now available on LAMBDA More info...
2021-10-21
new
Vansyngel et al. simulations
Vansyngel et al. simulations: Full-sky simulations of polarized Galactic dust and synchrotron emission presented by Vansyngel et al. (2017) are now available on LAMBDA More info...
2021-09-16
new
Color Correction Software
Software for calculating color correction factors to COBE/DIRBE photometry for a user-specified source spectrum is now available on LAMBDA More info...
2021-08-31
fixed
WMAP Optimal Time Domain Filters / Version 5.1
Filters for all DAs in version 5.0 were repetitions of the K-band filter. Version 5.1 updates the files to contain the correct filter for each DA. More info...
2021-08-11
new
SPTpol CMB Lensing Convergence Map
The 500 sq deg @SPTelescope SPTpol CMB lensing convergence map described by Wu et al. https://arxiv.org/abs/1905.05777 is now available on LAMBDA More info...
2021-07-28
new
CMB Solar Dipole Plots
Amplitude and direction of the CMB solar velocity dipole, as determined independently by five separate investigations. More info...
2021-07-21
new
Zodiacal light model
Entries for the Spitzer zodiacal light model and the Wright zodiacal light model have been added to LAMBDA's foreground modeling codes page .
2021-06-22
new
ACT Galactic Center maps
ACT maps of the Galactic Center described by Guan et al. (2021) are now available on LAMBDA More info...
2021-05-27
new
CMB/kSZ and Compton-y Maps
CMB/kSZ and Compton-y maps from 2500 sq deg of SPT-SZ and Planck data, presented by Bleem et al. (2021), are now available on LAMBDA More info...
2021-04-20
new
CMB Power Spectrum Plots
Plots of the BB, TE, and EE power spectra on the LAMBDA graphics page have been updated, and updated data files and code have been added to the LAMBDA CMBpol plotting github repository. More info...
2021-04-14
new
SPT-3G TE/EE Bandpowers and Likelihood
The SPT-3G TE and EE CMB power spectrum bandpowers and likelihood described by Dutcher et al. (2021) are now available on LAMBDA More info...
2021-04-12
new
ACTpol DR5 Coadd maps
ACT DR5 maps covering 18,000 sq deg, intended for point source studies, Galactic science, and SZ cluster analyses, are now available on LAMBDA See paper by Naess et al. More info...
2021-02-12
new
ACTPol DR5 Cluster Catalogs
ACT DR5 SZ galaxy cluster catalogs from Hilton et al. (2020) are now public on LAMBDA More info...
2020-12-04
new
CMB power spectrum plots
Plots of the CMB power spectra on the LAMBDA graphics page have been updated with 2020 ACTPol and POLARBEAR results, and updated data files have been added to the LAMBDA CMBpol plotting github repository. More info...
2020-09-24
new
WHAM H Alpha Map
Wisconsin H-Alpha Mapper all-sky velocity-integrated map available on LAMBDA More info...
2020-07-16
new
ACT DR4 Data Release
The Atacama Cosmology Telescope Data Release 4 (DR4) is now available on LAMBDA. More info...
2020-07-15
new
DRAO 10 MHz maps
DRAO 10 MHz radio continuum map are now available on LAMBDA. More info...
2020-06-12
new
Parkes 85 MHz radio continuum map
HEALPix versions of the Parkes 85 MHz radio continuum map are now available on LAMBDA. More info...
2020-06-12
new
CLASS Software
CLASS experiment atmospheric emission model and CMB E-mode interpolation software now available on LAMBDA More info...
2020-06-01
new
SPT Point Souce Catalog
The South Pole Telescope point source catalog and data products described by Everett et al. (2020) are now available on LAMBDA More info...
2020-04-22
new
WebSky simulations
WebSky microwave sky simulations described by Stein et al. now available on LAMBDA. More info...
2020-04-14
new
SPT-SZ + SPTPol Power Spectra / Version 1
Bandpowers and likelihood code from the joint SPT-SZ + SPTpol analysis presented by Reichardt et al. (2020) are now available on LAMBDA More info...
2020-03-12
new
Meisner and Finkbeiner 2015 dust reddening map
A map of interstellar dust reddening derived from Planck and DIRBE/IRAS data by Meisner and Finkbeiner (2015) is now available. More info...
2020-02-20
new
Gravitational Lensing Power Spectrum
Plots of the gravitational lensing power spectrum on the LAMBDA graphics page have been updated, and an updated data file has been added to the LAMBDA CMBpol plotting github repository . More info...
2020-02-03
new
POLARBEAR CMB
The POLARBEAR CMB lensing bandpowers and covariance from https://arxiv.org/abs/1911.10980 are now publicly available on LAMBDA. More info...
2020-01-31
new
Rhodes/HartRAO 2326 MHz radio continuum map
The Rhodes/HartRAO 2326 MHz radio continuum map covering 67% of the sky is now available on LAMBDA. More info...
2020-01-28
new
Cosmology Large Angular Scale Surveyor (CLASS)
The Cosmology Large Angular Scale Surveyor (CLASS) now available on LAMBDA! The first CLASS circular polarization bandpowers are available here: More info...
2020-01-22
new
SPT+Herschel/SPIRE Power Spectra
Cross power spectra of cosmic infrared and microwave background fluctuations from 95 to 1200 GHz (Viero et al. 2019) are now available on LAMBDA. More info...
2019-12-20
new
2019 Lensing Bandpowers
SPTpol lensing bandpowers and likelihood code from Bianchini et al. (2019) are now available on LAMBDA More info...
2019-11-26
new
SPTpol BB likelihood code
Likelihood code for the Sayre et al. (2019) SPTpol measurement of B-modes is now available on LAMBDA More info...
2019-11-18
new
CMB B-mode Power Spectrum
Plots of the BB power spectrum on the LAMBDA graphics page have been updated with 2019 SPTpol results, and updated data files and code have been added to the LAMBDA CMBpol plotting github repository. More info...
2019-11-13
new
SPTpol Extended Cluster Survey catalog
The SPTpol Extended Cluster Survey catalog from Bleem et al. (2019) is now available on LAMBDA. More info...
2019-11-07
new
SPTpol SZ Cluster Catalog
The SPTpol 100d SZ cluster catalog (Huang et al. 2019) is now available on LAMBDA. More info...
2019-09-27
new
Lenz et al Cosmic Infrared Background Maps
Cosmic Infrared Background maps formed from Planck intensity maps by Lenz et al. 2019 are now available on LAMBDA.
2019-09-16
new
Sroll 2.0 Maps and Simulations
Alternatively processed Planck HFI temperature and polarization maps from Delouis et al. 2019. are now available.
2019-09-16
new
Gravitational Lensing Power Spectrum
Plots of the gravitational lensing power spectrum on the LAMBDA graphics page have been updated, and an updated data file has been added to the LAMBDA CMBpol plotting github repository. More info...
2019-08-14
new
TIGRESS Simulated Dust Emission Maps
TIGRESS simulated dust emission maps in Stokes I,Q,U are now available on LAMBDA. More info...
2019-06-13
new
All-sky 150 MHz map of Landecker and Wielebinski
The all-sky 150 MHz map of Landecker and Wielebinski (1970) is now available on LAMBDA. More info...
2019-05-24
new
Maipu and MU Radar 45 MHz Map
The Maipu and MU Radar 45 MHz radio continuum all-sky map (Guzman et al 2011) is now available on LAMBDA More info...
2019-05-21
new
Dwingeloo 820 MHz Continuum Map
The Dwingeloo 820 MHz radio continuum map (Berkhuijsen 1972) is now available on LAMBDA. More info...
2019-05-15
new
Data Release Products for 277 GHz
ACT point source catalogs and 277 GHz maps from the equatorial survey are now available on LAMBDA More info...
2019-05-08
new
S-PASS 2.3 GHz Polarization Survey
Data release 1 of the S-PASS 2.3 GHz polarization survey of the southern sky is now available on LAMBDA. More info...
2019-04-19
new
Microwave Sky Simulations
Updated versions of the microwave sky simulations presented by Sehgal et al. (2009), used in the Simons Observatory forecasting paper https://arxiv.org/abs/1808.07445, are now available on LAMBDA More info...
2019-04-11
new
Atacama B-Mode Search (ABS)
Data products from the Atacama B-Mode Search (ABS) results presented by Kusaka et al., including 145 GHz mps and power spectra, are now available on LAMBDA More info...
2018-12-05
new
ACTpol Point Source Catalog
Two-season ACTPol Extragalactic Point Sources and their Polarization properties (Datta et al. 2018). More info...
2018-10-15
new
OVRO-LWA radio maps
OVRO-LWA radio maps at eight frequencies from 36 to 73 MHz are now available at LAMBDA. More info...
2018-07-30
new
HI4PI High Velocity HI
An all-sky map of Galactic high-velocity clouds from the 21-cm HI4PI survey is now available, and the full velocity HI4PI HI column density map remains available. More info...
2018-06-12
new
Stockert and Villa-Elisa 1.4 GHz Continuum Map
The all-sky 1.4 GHz continuum map from the Stockert and Villa-Elisa surveys is now available at More info...
2018-05-10
new
SPT+Planck lensing
Joint SPT-Planck CMB lensing convergence map now available on LAMBDA More info...
2018-04-27
new
Component Separation Methods
A summary table of component separation methods and codes is now available. More info...
2018-04-26
new
Composite H alpha
LAMBDA's holdings for the composite all-sky H alpha map have been updated to include HEALPix Nside=1024 and Cartesian projections from D. Finkbeiner's site. More info...
2018-04-24
new
South Pole collaboration
Archival South Pole collaboration CMB spectrum measurements are now available on LAMBDA. More info...
2018-04-18
new
SPT-SZ and Planck Temperature maps
Combined SPT and Planck temperature maps from the 2500 sq deg SPT-SZ survey area are now available at LAMBDA. More info...
2018-04-18
new
MIPOL (Milano Polarimeter)
Milano polarimeter upper limits to CMB circular polarization are now available at LAMBDA. More info...
2018-04-04
new
Gravitational Lensing Power Spectrum
Plots of the gravitational lensing power spectrum on the LAMBDA graphics page have been updated, and an updated data file has been added to the LAMBDA CMBpol plotting github repository. More info...
2018-03-29
new
LWA1 Radio Maps
Long Wavelength Array radio maps at nine frequencies from 35 to 80 MHz are now available at LAMBDA. More info...
2018-03-29
new
Joint SPT-Planck Lensing Analysis
Data products related to the cosmological parameters analysis of the SPT+Planck 2500 square-degrees lensing measurement More info...
2018-02-08
new
White Mountain collaboration
Archival White Mountain collaboration CMB spectrum measurements are now available on LAMBDA. More info...
2018-01-23
new
ACTPol SZ cluster catalog
The ACTPol two-season SZ cluster catalog is now available at More info...
2018-01-11
new
SPT likelihood
Updated South Pole Telescope likelihood files for use with newer versions of CosmoMC are now available at More info...
2018-01-05
new
CMB BB, EE, and TE power spectra
Bandpower plots on now have updated POLARBEAR and SPTPol data. More info...
2017-12-08
new
SPIDER 2017 circular polarization
Data products from the Nagy et al. 2017 SPIDER circular polarization analysis are now available on LAMBDA at More info...
2017-09-08
new
SPTpol TT, EE, and TE
SPTpol TT, EE, and TE bandpowers from three seasons of observations are now available at More info...
2017-09-08
new
Reddening (E(B_V)) Map (Lenz et al. 2017)
We have added the interstellar reddening map from Lenz et al. 2017 to LAMBDA at More info...
2017-08-01
new
Actpol Two Season lensing maps
ACTPol two-season Lensing maps products are now available. More info...
2017-07-07
new
TRIS Data
Three Radiometer CMB Spectrum Experiment More info...
2017-05-12
new
ACT 148/218 GHz Point Source Catalog
This is a catalog of 191 extragalactic sources detected by ACT at 148 and/or 218 GHz in the 2008 Southern survey. More info...
2017-04-27
new
Cosmic Birefringence Data
The data release for the cosmic birefringence and primordial magnetic field measurements by POLARBEAR More info...
2017-04-27
new
CMB data analysis tools PolSpice
We have released all-python implementations of the CMB data analysis tools PolSpice and pure S2HAT beta testers welcome!
2017-02-27
new
ACTPol two-season maps
ACTPol two-season intensity and polarization map products
2017-02-17
new
CMB EE and TE power spectra
We have added summary plots of CMB EE and TE power spectra from different experiments to
2017-02-16
new
CMB-only TT Power Spectrum
The plot shows CMB lensed bandpowers from recent ACTPol, Planck, and SPT measurements More info...
2017-02-13
new
Gravitational Lensing Power Spectrum Plots
Plots have been updated to LAMBDA graphics page showing measurements CMB experiments of gravitational lensing More info...
2017-01-30
new
ACTpol Data Release
ACTpol Two-Season Derived Data Spectra and Parameters
2016-10-12
new
LCDM Graphical History
An educational resource has been added outlining the standard LCDM model and graphical histories of selected parameters.
2016-09-09
new
SPT + Planck Magellanic Clouds
We have added maps of the Magellanic Clouds from combined South Pole Telescope and Planck data LAMBDA More info...
2016-05-19
new
FIRAS CIB Monopole Spectrum
Fixsen et al. (1998) modeled the Galactic and interplanetary foreground emission in the FIRAS data to determine the spectrum of the cosmic infrared background. More info...
2016-05-12
new
Dust Reddening Map from Green et al. (2015)
A map of interstellar dust reddening derived from the 3D reddening map of Green et al. (2015) is now available. More info...
2016-02-23
new
Gravitational Lensing Power Spectrum Plots
Plots have been added to LAMBDA's graphics page showing measurements of the gravitational lensing potential power spectrum from different CMB experiments. More info...
2016-02-22
new
Cosmological Footprints Tool Released
New cosmological survey footprint tool now at in LAMBDA Tools. Source files at Github. More info...
2015-09-03
new
QUIET Data Release
QUIET data from their galactic field observations at 43 and 95 GHz is now available on LAMBDA.
2015-08-13
new
Planck Public Data Release 2 / Version 2
In February 2015, the Planck Collaboration released a subset of the planned new 2015 data products (Public Release 2). Additional data releases are scheduled.
2015-02-12
new
2014 Reprocessed Haslam 408 MHz Map
The reprocessed 408 MHz all-sky map of Remazeilles et al. (2014), with improved source subtraction and destriping, is now available. More info...
2014-11-18
new
Online CAMB interface updated
The online CAMB tool has been updated to work with the April 2014 version of CAMB. More info...
2014-11-13
modified
Skyviewer 1.0.1 released / Version 1.0.1
A new version of the skyviewer tool has been released. This version has been built against libQGLViewer 2.5.1 and HEALPix 3.1.1.
2014-07-03
new
WMAP IDL Software Release / Version 3.1
A new procedure was released to calculate the effective center frequency of each WMAP band for a given spectral index.
2014-06-30
new
Plot of Upper Limits on BB-mode Polarization / Version 1
LAMBDA has created a page for publishing experiment-agnostic graphics and images. The first graphic is a plot showing upper limits on BB-mode polarization from several CMB experiments More info...
2014-02-19
modified
WMAP Beam Transfer Functions / Version 5.1
A new column has been added containing fractional 1-sigma error estimates More info...
2013-07-24
new
Planck Data Released
The Planck Team has released sky maps, likelihood software, and other data.
2013-03-21
new
ACT likelihood Products
Updated ACT likelihood including SPT data, ACT power spectrum data files.
2013-03-13
new
WMAP Nine-Year Images
Images from the Nine-Year WMAP analysis, suitable for use in scientific talks, are now available. More info...
2013-03-12
new
WMAP Temperature Point Source Exclusion Mask delivered
The WMAP team has released their Temperature-only Point Source Exclusion Mask More info...
2013-03-11
new
WMAP Processing Masks Released
The WMAP team has released a series of processing masks, the point source catalog mask, and the temperature cleaning mask. More info...
2013-01-17
new
ACT Three-Year Likelihood Products
Likelihood products for the ACT 3-year data, including the basic CMB temperature power spectrum likelihood, a lensing likelihood, and a multi-frequency temperature likelihood.
2013-01-14
new
The WMAP Nine-Year Data Release
The nine-year WMAP data release, including power spectra and the likelihood software, temperature and polarization sky maps, raw and calibrated time-ordered data, ancillary instrument data, and telemetry data. This is the final WMAP data release.
2012-12-20
new
QUIET Data Available through LAMBDA
The QUIET team has released their first and second season band powers through LAMBDA.
2012-11-28
new
QUaD Data Available through LAMBDA
The QUaD team has released their sky maps and band powers through LAMBDA.
2012-10-31
new
WMAP Team Awarded the 2012 Gruber Prize
Congratulations to Dr. Charles Bennett and the WMAP Science Team for being awarded the 2012 Gruber Prize for Cosmology.
2012-08-21
new
ACT 2008 148 GHz Data Release
ACT has released unbiased maximum-likelihood sky maps, hit count maps, beams, and source masks from their 148 GHz 2008 southern strip data. The strip covers roughly RA=21h30m to 8h and Dec=-57° to -48°.
2012-08-01
new
COBE "Science on a Sphere" Map Images
Sky map images formatted to be compatible with the NOAA's "Science On A Sphere" 3D visualization system are now available for COBE/DMR."
2012-04-19
new
Foreground "Science on a Sphere" Map Images
Sky map images formatted to be compatible with the NOAA's "Science On A Sphere" 3D visualization system are now available for seven galactic foreground data sets.
2012-04-19
new
Haslam 408 MHz Map / Version 1
The original version (in HEALPix format) that has not been de-striped nor had point sources filtered out. More info...
2012-04-05
modified
Updated WMAP MCMC-Chain Foreground Maps / Version 4.1
The WMAP Monte Carlo Markov Chain foreground maps underwent a FITS header update to make them compatible with HEALPIX file I/O software. More info...
2012-01-19
new
South Pole Telescope Data Release / Version 1
The South Pole Telescope team has released maps and ancillary files from their 2008 observations of the ra5h30dec-55 field.
2011-12-09
new
WMAP Simulated Sky Model / Version 4
Noiseless input models of the CMB+Galaxy used to generate the WMAP Seven-Year Simulated Sky Map products are now available. More info...
2011-11-04
new
SPT Likelihood Code
The SPT team has released a version of cosmoMC+CAMB modified to interface with the SPT data released by LAMBDA on 08-July-2011. More info...
2011-09-26
new
ARCADE 2 Data Delivered
Sky maps from the Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission (ARCADE 2) experiment have been delivered to LAMBDA. More info...
2011-08-04
new
Additional ACT Data Products Released
The ACT team has released the 2008-10 lensing likelihood and chains; MCMC chains from the 2008 analysis; Cosmomc modifications to use the 2008 likelihood; Cosmomc/CAMB modifications to estimate the primordial power spectrum in bins.
2011-07-20
new
SPT 150 GHz bandpowers
Results from 2008+2009 observations are now available covering the multipole range 650 < l < 3000. More info...
2011-07-08
new
WMAP BB Power Spectra in Q, V, and W Bands Released
The WMAP team has released the BB power spectra for the seven-year delivery in three frequency bands: Q, V, and W. More info...
2011-06-30
new
Educational Resources
A new collection of educational materials from instructors willing to share their cosmology-related tools with the community at large.
2011-05-05
new
Planck Sunyaev-Zeldovich Catalog
Planck's early release catalog of galaxy clusters identified through the Sunyaev-Zeldovich effect has been made available from LAMBDA to complement the SZ catalogs produced by SPT and ACT. More info...
2011-03-30
new
South Pole Telescope (SPT) Data Delivery
The SPT team has provided an initial delivery of power spectra and point source catalogs to LAMBDA. More info...
2011-03-30
modified
WMAP Chain Updates / Version 7.2
The "WMAP 7.1" chains that were released on 11/19/2010 had a small bug that affected the weight attached to each point in the chain. This has been corrected and the WMAP 7.1 chains have been replaced with WMAP 7.2 chains. The main effect of the bug was to introduce some artificial roll-off in the likelihood of the SZ amplitude parameter (which is largely unconstrained by WMAP). There was also some small effect on parameters like Ων2, which also has a sharp cutoff (it has to be greater than zero).
2011-02-09
new
WMAP "Science on a Sphere" Seven-Year Map Images
The WMAP team has released sky map images compatible with the NOAA "Science on a Sphere" 3D visualization system. These maps are based upon the seven year data release.
2011-01-12
new
WMAP Google Earth Seven-Year Map Images
The WMAP team has released sky map images compatible with the Google Earth 3D visualization application. These maps are based upon the seven year data release.
2011-01-12
new
ACT Data Products Released
The ACT team has released power spectra, beam functions, templates, and a point source catalog.
2011-01-03
new
ACT SZ Clusters 2008 Data
Catalog of 23 galaxy clusters detected by the Sunyaev-Zel'dovich (SZ) effect in 455 square degrees of sky surveyed by ACT during 2008 at 148 GHz. The catalog gives the cluster names, positions, redshifts, signal-to-noise, and measured SZ signal. SZ and optical images of each cluster are also included.
2010-11-19
new
Additional WMAP Parameter Chains / Version 4.1
WMAP has released 6 new cosmological parameter chains tailored to studies of H0: 3 constrained by WMAP data and 3 constrained by WMAP plus H0 data. In addition to the standard LCDM parameters, the chains sample the neutrino mass, the number of relativistic degrees of freedom, and the dark energy equation of state, respectively. These chains use version 4.1 of the WMAP likelihood, and the January 2010 version of CAMB, which includes RECFAST version 1.5. More info...
2010-11-19
new
WMAP TB, EE, and BB Power Spectra Released / Version 4.1
The WMAP team has released TB, EE, and BB power spectra from the seven year data delivery as stand-alone files. More info...
2010-10-29
new
ACT Likelihood Software Delivered / Version V2A1
The ACT Collaboration has released the software they use to compute the likelihood of cosmological models using the 148 GHz data. More info...
2010-10-08
new
FIRAS Radial Beam Profile
An average instantaneous FIRAS beam is tabulated at roughly 0.458 degree intervals. More info...
2010-10-08
modified
WMAP Telemetry Timing
In order to address persistent questions about telemetry timing, we have augmented the documentation on timing and pointing conventions in the WMAP data. The WMAP team is fully confident that science observations have been properly placed on the sky in all sky maps released to date. More info...
2010-10-08
new
The WMAP satellite has ended science observations
The WMAP satellite ended science observations on 20 August 2010. On 8 September 2010, WMAP departed L2 for a heliocentric orbit approximately 7% larger than the Earth's orbit, where it will remain indefinitely. The complete nine-year data set is now being processed and the final legacy data products will be released by 2012.
2010-09-29
new
Updated WMAP TT and TE Power Spectra / Version 4.1
WMAP has released updated TT and TE power spectra computed using the recently delivered updated likelihood software. More info...
2010-06-10
new
WMAP Seven Year Sky Map Data in Image Format
The flight data sky maps from the WMAP seven year data release are now available in more traditional projection formats: Mollweide and Zenith Equal area. These files may be manipulated and displayed with standard astronomical display software such as DS9 and SOAimage.
2010-05-28
fixed
WMAP Likelihood Data Files / Version 4.1
Version 4.1 contains one fix each to the TT and TE files that are released with the likelihood code and separately. There are no changes to the code itself. More info...
2010-05-27
new
WMAP Updated Reduced Resolution Sky Maps / Version 4.1
The WMAP inverse covariance matrices and the multi-year, reduced resolution sky maps have been updated to incorporate a better handling of the "loss imbalance" uncertainty. The new co-added maps have better regularization of certain poorly-measured modes. More info...
2010-04-28
new
WMAP Simulated Sky Maps Released
The WMAP team has released sky maps from the simulation used for the latest round of data analysis. Stokes I, Q, and U maps for each year and differencing assembly have been released, as well as foreground reduced Stokes I maps. More info...
2010-04-21
modified
WMAP Explanatory Supplement Updated / Version 4.1
The WMAP Explanatory Supplement has been updated to clarify: 1) The corrections made to the bore sight vectors due to thermal variability in the spacecraft; 2) The path that telemetry data follows from the spacecraft to the data analysis facility; 3) The contents of the time-ordered data meta data table; specifically the time associated with each measurement.
2010-04-05
modified
Updated Seven-Year WMAP Cosmological Interpretations paper / Version 2
References were added to the paper. The SZ section was expanded with more analysis. The discrepency between the KS and X-ray derived profiles has been resolved.
2010-02-12
new
The WMAP Seven-Year Data Release
The seven-year WMAP, including power spectra and the likelihood routine, temperature and polarization sky maps, raw and calibrated time-order data, and ancillary instrument data.
2010-01-25
new
High Resolution Microwave Simulations of the Full Sky
A collection of simulated full sky maps at several microwave frequencies showing different contributing emitters has been delivered to the LAMBDA site. Maps showing individual contributing sources have been supplied as well as maps combining different sources. A corresponding set of catalogs identifying sources has been supplied.
2009-10-01
new
WMAP IDL Software Update
A new release of the WMAP IDL Software has been released.
2009-10-01
fixed
WMAP Uncalibrated Time-Ordered Data FITS Header Correction
It was discovered that the FITS headers reported the data in the uncalibrated TOD files to be in millikelvin. These files have been corrected to report that data to be in counts. More info...
2009-09-16
new
WMAP Beam Map Pixelization Characterization
The 2.4 arcminute binning used in the beam maps filters some of the high frequency content. A transfer function is derived from an estimate of the symmetrized radial profile of the pixelization function. Both the transfer function and the radial profile have been provided. More info...
2009-07-20
new
Sloan Digital Sky Survey LRG Likelihood Software
A software package that computes parameter likelihoods for the Luminous Red Galaxies data form the Sloan Digital Sky Survey has been released!
2009-07-13
new
WMAP Sky Map Data in Image Format / Version 1
Previously released sky maps in HEALPix format are now also available in more traditional projection formats: Mollweide and Zenith Equal Area. These files may be manipulated and displayed with standard astronomical display software such as DS9 and SAOImage.
2009-06-15
new
ACBAR 2008 Data
High-resolution CMB power spectrum and ancillary data from the complete ACBAR data set.
2009-06-03
fixed
WMAP Noise Level Table Correction for Foreground-Reduced Sky Maps
The table of noise levels, σ0, for the full-resolution, foreground-reduced maps were updated on 2 June 2009 to correct an error. The previously posted values were inadvertantly copied from the 3-year release.
2009-06-02
new
Skyviewer executable for Microsoft Windows / Version 1.0.0
The LAMBDA team has built skyviewer under Microsoft Windows and has released the executable image.
2009-03-12
modified
WMAP Likelihood Software Optimization / Version v3p2
The performance of the WMAP Likelihood software was significantly improved by reordering nested DO loops. More info...
2009-03-05
new
Skyviewer Tool Major Release / Version 1.0.0
A new version of Skyviewer has been released. This version supports Qt4, and the user interface has been completely redesigned.
2009-02-06
modified
WMAP Cosmological Parameters Table Update
The WMAP Cosmological Parameters Table has been updated with best-fit Cl spectra.
2009-02-03
new
MCMC Foreground Maps -- Shifted Spinning Dust Model
WMAP galactic foreground model maps were delivered; these maps were generated using a pixel-based MCMC algorithm implemented with a shifted spinning dust fitting model. More info...
2008-11-19
new
MCMC Foreground Maps -- Steepening Synchrotron Model
WMAP galactic foreground model maps were delivered; these maps were generated using a pixel-based MCMC algorithm implemented with a steepening synchrotron fitting model. More info...
2008-11-19
new
Astronomical Coordinates of HEALPix pixels
We supply galactic coordinate projection map files containing the astronomical coordinates of the pixel centers at several HEALPix resolutions and both HEALPix ordering schemes.
2008-11-06
modified
CAMB Online Tool Update
The CAMB Online interface was updated to support the September 2008 version of CAMB and its new parameters. More info...
2008-10-30
modified
WMAP Likelihood Software Patch / Version v3p1
A user-supplied patch has been released that allows the data directory to be supplied through an operating system environment variable instead of being hard-coded into the software. More info...
2008-10-20
new
WMAP Loss Imbalance Templates
Polarization templates (Q,U) that trace the effect of a small transmission imbalance between the A & B sides of the WMAP instrument. One per differencing assembly. More info...
2008-10-09
fixed
Corrected Singular Value Decompositions of WMAP Inverse Covariance Matrices
New versions (v3p1) of the N-1 SVD files have been delivered to LAMBDA. The decompositions were done on N-1 matrices in Nobs units. Scaling to mK-2 units has been applied to the eigenvalues. These files supersede the originally delivered versions (v3) in which the scaling to mK-2 was erroneously applied to the eigenvectors. More info...
2008-10-02
new
WMAP Temperature Point Source Exclusion Mask
A point source only exclusion mask for temperature maps has been delivered by the WMAP team. More info...
2008-09-09
new
WMAP Effective Frequency Calculator
WMAP has supplied a web tool that calculates the effective frequency of each of its frequency bands given one or more spectral indices. More info...
2008-08-01
new
WMAP Worldwide Telescope Map Images
Microsoft has formatted a set of maps for their Worldwide Telescope 3D visualization application.
2008-07-30
new
WMAP "Science On a Sphere" Map Images
Sky map images formatted to be compatible with the NOAA "Science On A Sphere" 3D visualization system have been provided
2008-06-06
new
WMAP Google Earth Map Images
Sky map images formatted to be compatible with the Google Earth 3D visualization application have been provided
2008-06-06
new
WMAP Bandpass Frequency Response Tables Delivered
The WMAP team has delivered frequency response tables for each detector in WMAP's twenty radiometers. More info...
2008-05-30
new
LAMBDA and HEASARC Merge
The High Energy Astrophysics Science Archive Research Center (HEASARC) and the Legacy Archive for Microwave Background Data Analysis (LAMBDA) have merged into a single organization that will use the name HEASARC. The merged archive will continue to provide all of the services currently being offered by the two archives, while better serving users interested in studies requiring both high energy and microwave data. Users will notice few immediate changes, but we will gradually fully integrate all the services of the archives.
2008-05-20
modified
Updated WMAP Cosmological Parameters Table
The most recent Cosmological Parameters table has been updated with Markov chains for most of the model/dataset combinations reported.
2008-04-25
new
WMAP Chain Analysis Software
A WMAP modification of the CosmoMC getdist program has been released.
2008-04-25
new
MCMC Foreground Maps
Galactic foreground model maps generated using a pixel-based MCMC algorithm, as described in Gold et al. More info...
2008-04-10
new
WMAP Cosmological Parameter Plotter / Version 1
This tool plots or tabulates cosmological parameter likelihoods for the different model & data set combinations found in the WMAP Cosmological Parameter Table. The user may select one or more model & data set combinations to plot simultaneously. Each selected parameter will be plotted in a separate panel.
2008-03-19
new
The WMAP Five-Year Data Release
The five-year WMAP data, including power spectra and the likelihood routine, temperature and polarization sky maps, raw and calibrated time-ordered data, and ancillary instrument data.
2008-03-05
new
Leiden/Argentine/Bohn (LAB) HI survey
The LAB survey contains the final data release of observations of 21-cm emission from Galactic neutral hydrogen over the entire sky. More info...
2007-11-15
modified
Updated WMAP Inverse Covariance Matrices
A small effect due to transmission imbalance between the A side and the B side of the instrument has been projected out of the inverse variance matrices as described in Section 3.5.1 of Jarosik et. al. (2007). This marginalization was inadvertently omitted from the initial v2 release of these files, but it is small enough that it is unlikely to change any results obtained with the original matrices. More info...
2007-06-13
new
WMAP 3-Year Paper Figures
The figures from the 3-year WMAP papers are now available in PNG format for use in talks. More info...
2007-03-22
new
Contributed Software Archive
An astro-ph-style archive that members of the community may use to share software packages.
2007-03-14
new
FIRAS Data in HEALPix Format
The FIRAS data that formed the final COBE Project data release have been partially reprocessed to produce sky products in HEALPix format. More info...
2007-01-25
new
WMAP Best Fit Matter Power Spectra
Matter power spectra have been supplied for the model/dataset combinations displayed in the WMAP Cosmological Parameter Table. More info...
2007-01-25
new
WMAP TB & EB Power Spectra
Best estimates for the TB and EB power spectra of the CMB, unbinned for analysis. More info...
2007-01-12
modified
skyviewer 0.2.4 Released
A problem with the Mollweide projection in skyviewer was fixed.
2007-01-10
modified
Revised Three-Year WMAP Papers
The three-year papers have been updated to reflect the versions in press at ApJ. More info...
2007-01-08
modified
Updated Cosmological Parameter Table
There are three revised entries and one new entry in the cosmlogical parameter table, in association with the revised three-year papers. On 12 January 2007, three of these chains were updated with additive constants as described in the Release Notes. More info...
2007-01-08
new
COBE DIRBE Zodiacal Light Prediction Software
IDL software for calculating the zodiacal light predicted from the DIRBE team interplanetary dust model. More info...
2006-12-28
modified
WMAP Likelihood Software / Version 2.2.2
An update to the WMAP Likelihood code that incorporates a faster low-l TT likelihood module, suggested by Jon Sievers of CITA. Also includes fixes for some memory allocation and compiler-related problems. Release Notes. More info...
2006-11-24
new
Low-l Likelihood Software
Code and data from Eriksen et al. used to estimate the low-l TT likelihood using a Blackwell-Rao estimator in conjunction with pre-computed Gibbs samples. More info...
2006-11-02
modified
WMAP Likelihood Software / Version 2.2.1
An update to the WMAP Likelihood code that incorporates new capability to evaluate the low l TT likelihood, a revision to the point source amplitude and uncertainty, and numerous software enhancement. Release Notes. More info...
2006-10-17
new
DMR Calibrated Individual Observations (CIO)
The DMR CIO files contain the DMR 4-year time-ordered data in FITS format. More info...
2006-10-03
new
SYNFAST tied into the CAMB and CMBFAST Online tools
The HEALPix synfast application is now used in the CMBFAST and CAMB online tools to produce sky maps based upon spectra computed by these applications.
2006-08-24
modified
The WMAP IDL Software Library Update / Version 2
IDL procedures to read the temperature/polarization WMAP skymaps and to read the second release time-ordered data were added and/or modified. A procedure to compute pointing positions in astronomical coordinates for the observations in a time-ordered data record was written.
2006-08-16
new
Additional CMB Polarization Masks
More aggressive polarizations masks, labeled P04 and P02, are provided for researchers who wish to investigate the effects of more extensive foreground cuts. More info...
2006-07-27
new
Augmented Cosmological Parameter Table
The cosmological parameter table has been augmented with 3 additional models: non-flat CDM ("ocdm"), non-flat CDM with quintessence ("ocdm+wpert"), and flat CDM with a running spectral index and tensors ("lcdm+run+tens").
2006-07-12
new
Updated Cosmological Parameter Table
The Cosmological Parameter Table has been reorganized and updated with several new Markov chains, best-fit model power spectrum files and printable parameter tables. The new entries all carry the version string 'v2p1' (some of which were posted prior to this announcement). Results for non-flat models and CDM models with running plus tensors are forthcoming.
2006-06-14
new
EE & BB Power Spectra
WMAP EE and BB binned power spectrum data, which are plotted in Figure 25 of "Three-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Polarization Analysis," Page et al. (2006).
2006-05-05
new
WMAP ILC Region Definition Map / Version Version 2.0
Defines the sky coordinate boundaries of the 12 regions used in the generation of the WMAP Internal Linear Combination (ILC) Map. More info...
2006-04-17
new
Predicted SZ Power Spectrum
The angular power spectrum due to the Sunyaev-Zeldovich effect, as predicted by Komatsu & Seljak (2002).
2006-03-21
new
The WMAP Three-Year Data Release
The three-year WMAP data, including power spectra and the likelihood routine, temperature and polarization sky maps, raw and calibrated time-ordered data, and ancillary instrument data.
2006-03-16
modified
Skyviewer Update / Version 0.2.3
Skyviewer was updated to compile against libQGLViewer 2.1.1
2005-12-19
new
CAMB Online Interface
We have developed a web-based interface to the CAMB tool.
2005-12-02
new
QMAP Calibrated Sky Maps
Sky maps from both flights of the QMAP balloon experiment, including maps at 33 GHz (Ka band) and 41 GHz (Q band).
2005-11-18
new
QMASK Calibrated Sky Map and Power Spectrum
Sky map and angular power spectrum obtained by combining data from the QMAP and Saskatoon experiments. More info...
2005-11-18
new
LILC Reduced-Foreground Map
Reduced galaxy map produced by Eriksen et al. using a variant of the ILC algorithm that employs a Lagrange multiplier, hence LILC. More info...
2005-11-03
new
Simulated ILC maps
An ensemble of simulated ILC map, transformed to harmonic space, produced by Eriksen et al. for use with error analyses of the real ILC map. More info...
2005-10-21
new
ARCHEOPS Experiment Results
Improved results from the ARCHEOPS Experiment have been added to the LAMBDA archive.
2005-10-17
new
WMAPViewer tool added to the CMB toolbox / Version 1.0
This is a web-based tool that allows the user to view a CMB sky map using a technology similar to that used on maps.google.com. Note: This tool has been removed due to incompatibility with modern web browsers.
2005-09-30
new
IRAS/ISSA plates
IRAS diffuse emission data projected info HEALPix format. More info...
2005-09-20
new
COBE-FIRAS CMB Monopole Spectrum
Spectrum of the CMB monopole with uncertainties. More info...
2005-09-01
new
SWAS Data Release 10
Includes all data taken in the five and a half years of the nominal science mission. More info...
2005-07-22
new
WMAP 1st-year Reduced-Foreground Maps
WMAP 1st-year Reduced-Foreground Maps produced by Tegmark et al. More info...
2005-03-11
new
Skyviewer / Version 0.2.2
Skyviewer is an OpenGL based program to display HEALPix-based skymaps, saved in FITS format files.
2005-02-25
new
COBE/DMR 4 -year Sky Map in HEALPix
DMR 4-year sky maps reprocessed from the time-ordered data into HEALPix tessellated sky maps. More info...
2005-02-11
modified
CMBFast Online Update / Version 4.5.1
Corrected a problem with timeouts between the browser, server, and intervening firewall.
2005-01-07
new
WMAP Beam Radial Profiles / Version Version 1.0
New product; symmetrized radial beam profiles for each WMAP differencing assembly, as derived from first year data. More info...
2004-11-18
new
SWAS Data Release 9
Includes all data taken in the first four and a half years of the mission. More info...
2004-08-03
new
MAPVIEW "IDL Virtual Machine" Widget
Healpix FITS file display viewer, useable without an IDL license.
2004-08-02
modified
WMAP IDL Library / Version 1.3
Include quaternion interpolation software, enhanced capabilities for MAPVIEW.
2004-08-02
new
VSA Experiment Results
The 2nd data release by the VSA experiment in February 2004 has been added to the LAMBDA archive. The new results incorporate the previous data releases.
2004-07-21
new
CMBFAST 4.5.1
Installed CMBFAST 4.5.1 as the backend to the online interface. Updated the online interface to support the changes in input parameters. Added tensor modes plots to the results page.
2004-04-08
new
SWAS Data Release 8
Includes all data taken in the first four years of the mission. More info...
2004-02-18
modified
'Foreground Cleaned' I Maps
The documentation was augmented to add a warning that the template sky maps used in the cleaning contain ringing artifacts around bright sources like the LMC. More info...
2004-01-09
new
VSA Experiment Results
Data released by the VSA experiment in December 2002 have been added to the LAMBDA archive.
2003-11-21
new
WMAP Simulated Noise Maps
110 sky maps containing simulated instrument noise for each WMAP differencing assembly. More info...
2003-11-21
modified
WMAP Binned TT Power Spectrum / Version Version 1.1
Inserted two new columns documenting the lower and upper values of multipole moment 1 used to form each bin. More info...
2003-10-31
new
CBI Experiment Deep Field and Mosaic Results
Data obtained by the CBI Experiment in 2000 have been added to the LAMBDA archive.
2003-10-17
new
ARCHEOPS Experiment KS3 Results
Data obtained by the ARCHEOPS Experiment have been added to the LAMBDA archive.
2003-09-11
new
SWAS Data Release 7
Includes all data taken in the first three and a half years of the mission. More info...
2003-09-05
new
WMAP Temperature Correlation Function / Version Version 1.0
Two-point temperature correlation function computed from the WMAP ILC map. More info...
2003-08-19
new
ACBAR Band Powers and Window Functions
Data obtained by the ACBAR experiment at the South Pole in 2001-2 have been added to the LAMBDA archive.
2003-08-01
new
WMAP Composite Mask / Version Version 1.0
Several intensity masks bundled into one file. The point source mask is specifically broken out from the diffuse emission masks. More info...
2003-07-31
modified
WMAP IDL Library / Version Version 1.2
Includes minor fixes to version 1.1, improved Windows compatibility, additional reprojection capability. More info...
2003-07-30
modified
WMAP Point Source Catalog / Version Version 1.1
The initial release has been revised to include spectral index information and updated fluxes for four sources. More info...
2003-07-29
new
MAXIMA-1 Calibrated Sky Map and Derived CMB Products
Data obtained by the MAXIMA-1 balloon experiment in 1998 have been added to the LAMBDA archive.
2003-07-22
new
WMAP Theoretical LCDM Power Spectra, FITS format / Version Version 1.0
The theoretical LCDM power spectra already provided in ASCII format are now available in FITS format compatible with SYNFAST. More info...
2003-07-18
new
Composite HI column density map
All-sky map derived from the Leiden/Dwingeloo survey combined with data from Dickey & Lockman. More info...
2003-07-16
new
Composite W(CO) map
The composite map of Dame, Hartmann & Thaddeus (2001). More info...
2003-07-16
new
WMAP ILC Region Definition Map / Version Version 1.0
Defines the sky coordinate boundaries of the 12 regions used in the generation of the WMAP Internal Linear Combination (ILC) Map. More info...
2003-07-08
new
WMAP 'Foreground Cleaned' I Maps / Version Version 1.0
Q, V and W band I Maps used in the generation of the WMAP first-year CMB power spectrum. More info...
2003-06-26
new
COBE FIRAS Spectrum Browser
This tool permits browsing of the FIRAS data for preliminary investigations of localized sources.
2003-06-06
modified
Rewritten Outreach section / Version 2
The publications lists in the Outreach section were rewritten to be more useful. The default list shows all publications submitted to astro-ph within a year; a second list is provided to show all tracked publications.
2003-05-22
new
COBE DIRBE Small Source Spectral Energy Distribution Browser
This tool permits browsing of the DIRBE data for preliminary investigations of potential point sources.
2003-05-20
modified
LAMBDA Site Update
The site has been re-implemented using ColdFusion to enable dynamic page building. Page extensions have changed from .html to .html, which may require users to update some of their links.
2003-05-15
new
WMAP Theoretical LCDM Power Spectrum / Version Version 1.0
Selected theoretical power spectra fit to WMAP data in combination with other datasets. More info...
2003-04-16
new
SWAS Data Release 6
Includes all data taken in the first three years of the mission. More info...
2003-04-09
new
WMAP IDL Library / Version Version 1.1
Includes minor fixes to version 1.0, plus new routines to compute sky coordinates from quaternions. More info...
2003-03-19
new
WMAP Binned TE Power Spectrum / Version Version 1.0
New product; a binned version of the combined TE power spectrum, useful for plotting. More info...
2003-03-17
new
WMAP Cosmological Parameters Table
Summary table of the best-fit cosmological parameters from the WMAP team. More info...
2003-03-11
new
WMAP Binned TT Power Spectrum / Version Version 1.0
New product; a binned version of the combined TT power spectrum, useful for plotting. More info...
2003-02-21
modified
WMAP Combined TT Power Spectrum / Version Version 1.1
Cosmic variance portion of error in column 3 modified to reflect best-fit running index model. Added columns 4 and 5 to document contributions to total error from measurement errors and cosmic variance. More info...
2003-02-21
fixed
WMAP Likelihood Code / Version Version 1.1
Fixed a bug in code that reads in the off-diagonal elements of the TE covariance matrix. Users report that this bug had a minimal effect on likelihood analyses and does not warrant re-running of previous results. More info...
2003-02-21

A service of the HEASARC and of the Astrophysics Science Division at NASA/GSFC
Goddard Space Flight Center, National Aeronautics and Space Administration
HEASARC Director: Dr. Alan P. Smale
LAMBDA Director: Dr. Eric R. Switzer
NASA Official: Dr. Eric R. Switzer
Web Curator: Mr. Michael R. Greason