SWAS Data Online
The Table below constitutes the tenth SWAS public data release. This consists of a complete set of SWAS data from mission day 0049 (the first day of usable science data) to mission day 2089. 96 sources were observed during this release period, with 40 of them being new sources observed for the first time by SWAS. Release notes.
Data are available in CLASS format for all sources that were observed in the five and a half years of the SWAS mission, from mission day 049 (the first day of usable science data) to mission day 2089. (Mission day 001 was defined to be November 01, 1998.) Data are available in FITS format for all sources observed in the five and a half years of the mission, except the six comets and four planets. See the data product overview page for information on the SWAS data products and SWAS data processing. The index table below lists the sources that were observed during the five and a half years of the mission. Plots of co-added spectra from the five and a half years of the mission can be viewed from the spectral data browser page. A table listing all sources observed by SWAS is available at the SWAS project web site.
CLASS Format Data
All of the CLASS data for a particular source are stored in a file named all.dat. The source names are included in the index table below. Some of the source names have a number appended to the root source name (e.g., "+15" in L134N+15 or "-126" in SGRB2-126). The suffix number denotes data taken with an alternate local oscillator (LO) setting. In the example of L134N+15, the LO was set to center the filterbank at VLSR = VLSR(L134N) + 15 km/s. Clicking on a class data Dataset Identifier in the index table initiates downloading of the all.dat file for that source. (If this doesn't work for you, try a right-button click and select "Save Link As..." [Netscape] or "Save Target As..." [Internet Explorer]. Another alternative is to try a <SHIFT>-click using the left mouse button).
FITS Format Data
The data for a particular source are all contained within one or more FITS files, with each file corresponding to one observed position (i.e., if SWAS has made a 9-point map of a source, there will be 9 individual files). Each FITS file contains up to 6 separate FITS extensions, corresponding to the 6 SWAS sidebands (i.e., CI - O2, H2O - 13CO, and H218O - other). Each FITS extension contains a secondary header that provides information about the spectrum within the extension. The extension header is followed by the total co-added spectrum for the first four years of the mission. (Co-added spectra for individual orbits are not available in the FITS files for this release, but are available in the CLASS files.)
A FITS data index table provides information about the available data, with one entry for each sideband observed at each pointing position. This table is quite large and may take a long time to display. A link is provided for each pointing/bandpass pair giving direct access to the FITS file. Access to these files is also provided through the index table below; clicking on the FITS link will display a table showing only the FITS files associated with that source. Again, many of these lists are quite long and may take a long time to display.
Note that the CLASS format is more convenient if one is interested in working with data at many pointing positions for a given source.
The SWAS Science Operations Center has chosen not to provide FITS-format grand co-add files for moving targets/time-variable targets at this time. Such a grand co-add would be misleading and confusing to archive users. The SWAS SOC recommends that archive users work with the Class-format files for these targets.
SWAS Tenth Public Release Moving Targets/Time-Variable Targets ==================================== Comet Lee (c_lee) Comet McNaught (c_mcnaught) Comet LINEAR A2 (c_lineara2) Comet LINEAR WM1 (c_linearwm1) Comet Ikeya-Zhang (c_ikeya-zhang) Comet Encke (c_encke) Jupiter (jupiter) Mars (mars) Saturn (saturn) Venus (venus)
SWAS Data Table
Recommended download procedure for CLASS files: right click on the file name and save.
2 Data segments affected by an illegal system temperature problem have been excluded.
3 Previously delivered data segments taken in chop_nod mode have been reprocessed.
4 The observations made for Comet/1999 T1 (McNaught-Hartley) during SWAS mission days 824 - 886 have been reprocessed. This was necessary because a newer ephemeris which yielded more accurate radial velocities was made available after the initial processing was completed in the SWAS pipeline software system in 2001. The processing of the spectra in the 7th public release is based on the ephemeris for C/1999 T1 generated on 2003 March 4th, using the web-based form available at http://ssd.jpl.nasa.gov/cgi-bin/eph.