The Extended LRS Atlas on the Boston College Dataverse
2025 April

This dataset contains an updated atlas of spectra from the Low-Resolution
Spectrometer (LRS) on the Infrared Astronomical Satellite (IRAS), which took
spectra from 7.67 to 22.73 um with a spectral resolving power of 20-60. The
updated atlas includes 11,238 spectra, including 5,425 spectra published in
the original LRS Atlas, 5,796 spectra published in three later papers, and
17 spectra previously available online but not published.

Each spectrum is provided in IPAC-table format, with metadata information
in the file header.  The spectral files contain five data columns:

|wavelength|    flux   |   error   |segment|  rawflux  |
|   float  |   float   |   float   |  int  |   float   |
|    um    |     Jy    |     Jy    |       |     Jy    |

See Sloan, Kraemer, & Volk (2025, ApJS, in press) for details on the contents
of the spectral data files and the ancillary data also included (and listed
below). The spectra have 0s in the error column to make the tables compatible
with certain software that requires an error column.

The spectra will also be available at IPAC in the (searchable) Infrared
Science Archive (IRSA).

Files in this dataset:

README_Extended-LRS-Atlas.txt
  (this file)
IRAS-LRS_ExtendedAtlas_20250305_Sloan+25.tar.gz
  (the full dataset with 11,238 spectra)
SAMPLE-SPECTRUM_02168-0312.sp.tbl
  (a sample spectrum to show the format and header)
IRAS-LRS_ExtendedAtlas_Table.tbl
  (The master table with ancillary data for all 11,238 spectra)
IRAS-LRS_Wavelength_grid.tbl
  (A table with the LRS resolution vs. wavelength)
IRAS-LRS_Corrections.tar.gz
  (The four spectral corrections discussed by Sloan et al. 2025)