CASSIS: THE CORNELL ATLAS OF SPITZER/INFRARED SPECTROGRAPH SOURCES

By V. Lebouteiller, D. Barry, H. Spoon, Jeronimo Bernard-Salas, G. Sloan, J. Houck, D. Weedman. 2011

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We present the spectral atlas of sources observed in low resolution with the Infrared Spectrograph on board the Spitzer Space Telescope. More than 11,000 distinct sources were extracted using a dedicated algorithm based on the SMART software with an optimal extraction (AdOpt package). These correspond to all 13,000 low-resolution observations of fixed objects (both single source and cluster observations). The pipeline includes image cleaning, individual exposure combination, and background subtraction. Particular attention is given to bad pixel and outlier rejection at the image and spectra levels. Most sources are spatially unresolved so that optimal extraction reaches the highest possible signal-to-noise ratio. For all sources, an alternative extraction is also provided that accounts for all of the source flux within the aperture. CASSIS provides publishable quality spectra through an online database together with several important diagnostics, such as the source spatial extent and a quantitative measure of detection level. Ancillary data such as available spectroscopic redshifts are also provided. The database interface will eventually provide various ways to interact with the spectra, such as on-the-fly measurements of spectral features or comparisons among spectra.

Subfields: Astronomy and Astrophysics, Instrumentation, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/53f282b3bf48fedfcbaf2a8c0246c2426ae5d180

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Citations in the corpus

The Herschel Dwarf Galaxy Survey - I. Properties of the low-metallicity ISM from PACS spectroscopy (2015, methodology): “The low-resolution data were retrieved from the CASSIS spectral database v6 (Lebouteiller et al. 2011).”
AN ATLAS OF GALAXY SPECTRAL ENERGY DISTRIBUTIONS FROM THE ULTRAVIOLET TO THE MID-INFRARED (2013, methodology): “We wish to thank Vianney Lebouteiller for responding to our queries about and making improvements to the Cornell Atlas of Spitzer/IRS Sources (CASSIS Lebouteiller et al. 2011).”
The SAGE-Spec Spitzer Legacy Program: The Life Cycle of Dust and Gas in the Large Magellanic Cloud (2010, methodology): “For sources in this program that were not spatially extended, we also used optimally extracted spectra from the CASSIS data base (Combined Atlas of Spitzer IRS Sources; Lebouteiller et al. 2015).”
Determining Inclinations of Active Galactic Nuclei Via Their Narrow-Line Region Kinematics (2012, methodology): “We retrieved mid-IR spectra from the Cornell Atlas of Spitzer/IRS Sources (CASSIS) (Lebouteiller et al. 2011), which provides reduced low-resolution spectra (R ∼ 60 − 127 over 5.2µm to 38µm) taken by the Infrared Spectrograph (IRS) instrument aboard Spitzer.”