VizieR Online Data Catalog: MIR extinction toward Cyg OB2-12 ISM (Hensley+, 2020)

CygOB2-12 is one of 159 stars that compose the Spitzer Atlas of Stellar Spectra (SASS), a set of prototype stellar spectra taken by the Spitzer Infrared Spectrograph (IRS) that have been reduced in a homogeneous way. The SASS CygOB2-12 spectrum is a synthesis of two observations, one in 2004 October (AOR9834496) and the other in 2008 August (AOR27570176), that include data from both the Short-Low and Long-Low modules. Together, these provide full spectral coverage from 5.2 to 35μm. With its high signal-to-noise ratio and spectral resolution, the Spitzer IRS spectrum of Cyg OB2-12 provides perhaps the most detailed characterization of MIR extinction from the diffuse interstellar medium (ISM) of any current data. We therefore propose using these data to extend determinations of the mean Galactic extinction curve into the MIR and even FIR.

(1 data file).