Spectra of IRS Standard Stars
This data set consists of the candidate spectrophotmetric standard stars for the Infrared Spectrograph (IRS) on Spitzer: 33 K giants, 20 A dwarfs, and 20 M giants. A subset of these stars were selected during the mission to be the primary calibration standard stars for the IRS. The IRS covered a wavelength range of 5.1 to 37.0 microns.
You can get a close-up map of a region by clicking on any of the red overlays on the above image, or by typing a coordinate below.
Areas with spectra are shown in red on the all-sky ISSA image above. Use the form below to enter a coordinate or object name to search for data, or click on any red region to get a close-up of the area. You can also browse the A dwarf, K giant, and M giant spectra directly.
Unless noted otherwise, the A dwarf and K giant spectra are coadded from the available data, as described by Sloan et al. (2015a). The two exceptions are HR 6348 and HD 173511, which served as primary standards for the IRS and for which template spectra are provided. These were constructed as described by Sloan and Ludovici (2012). The M giant spectra are described in Sloan et al. (2015b).
Access all the Spitzer Legacy datasets at IRSA.
Click here for more information and instructions on using Atlas Instructions
Also available is a Program Interface to Atlas.
Target Selection Single Object
(Name or Coords)
Table Upload
(Multi Object) Instructions
Size (deg):
[maximum 12.5]
Images must cover coordinate
Coordinate Examples:
  • 238.956638 58.911651 eq
  • 90.05411438 36.80885622 ga
  • 317.05435488 83.24001354 ecl
  • 29 Vul
Default: Equatorial J2000