FIRAS Small Source Spectral Energy Distributions

This interactive service permits browsing of the FIRAS data for preliminary investigations of localized sources. Detailed information about the FIRAS instrument, its operation, calibration, and the FIRAS data products can be found in the FIRAS Explanatory Supplement. Given an on-source position and offsets for reference positions, this service displays the on-source, average off-source, and difference spectra for the frequency range 70-2880 GHz with 21 GHz resolution. A brief explanation of this form is available.

Enter the coordinates and select the system and epoch of the position of interest. For the reference positions, specify the angular offsets, the directions, and the system. The integral flux will be estimated for the wavelength integration range specified.

On-source position
(e.g., 10h16m24s or 10.273)
(e.g., -25d19m34s or -25.33)
An object name query can be used to obtain source coordinates using the service of the SIMBAD database at CDS Strasbourg or the service of the NASA/IPAC Extragalactic Database (NED).
Reference positions
Offset directions: (select at least two directions)
(decimal degrees)
-or-
Subtract CMBR
-or-
Use no reference spectrum
Integration range
(GHz, >= 70)
(GHz, <= 2880)

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. Thomas M. Essinger-Hileman
NASA Official: Dr. Thomas M. Essinger-Hileman
Web Curator: Mr. Michael R. Greason