VizieR Online Data Catalog: COS Legacy Archive Sp. Survey (CLASSY) treasury (Berg+, 2022)

The COS Legacy Archive Spectroscopy Survey (CLASSY) combines 135 orbits of new HST data with 177 orbits of archival HST data, for a total of 312 orbits, to complete the first atlas of high-quality rest-FUV COS spectra of 45 local star-forming galaxies.

In order to complete the FUV spectral coverage of the CLASSY sample, the archival observations were supplemented with 76 new HST/COS spectroscopic data sets of 42 galaxies, compiled over 135 orbits in Cycle 27 as part of PID 15840. These data consist of 27 G130M data sets, 5 G160M data sets, 29 G185M data sets, and 8 G225M data sets. Details of all individual data sets are provided in Table 2.

High-quality optical spectra have been compiled for the entire CLASSY sample to ensure uniform determinations of galaxy properties. Initially, much of the sample was selected from the SDSS, and so archival SDSS spectra exist for 38 of the CLASSY galaxies. The exceptions are J0036-3333, J0127-0619, J0144+0453, J0337-0502, J0405-3648, J0934+5514, and J1444+4237. Instead, we use VLT/VIMOS integral field unit (IFU) from James+ (2009MNRAS.398....2J) for J0127-0619, MMT Blue Channel Spectrograph spectra from Senchyna+ (2019MNRAS.488.3492S) for J0144+0453 and J1444+4237, Keck/KCWI IFU spectra from Rickards Vaught+ (2021ApJ...911L..17R) for J0337-0502, and VLT/MUSE IFU spectra for the remaining four galaxies.

To ensure robust direct T_e measurements for J0808+3948, J0944+3442, and J1545+0858, very high-S/N optical spectral were obtained using the Multi-Object Double Spectrographs (MODS) on the Large Binocular Telescope (LBT).

We gathered additional optical spectra from archival VLT/MUSE IFU spectra and Keck/ESI spectra from R. L. Sanders et al. (2022, in preparation), and spectra that were prioritized over the SDSS spectra due to their superior S/N and spectral resolution.

The details of the ancillary optical spectra adopted for the CLASSY sample are listed in Table 4.

The SDSS provides optical imaging in ugriz for 42 galaxies in the CLASSY sample. For the other three, J0036-3333 and J0405-3648 have grizY images from the DES (Abbott+ 2021, II/371), and J0337-0502 is observed by the Pan-STARRS1 (Chambers+ 2016, II/349). For the UV, 43 galaxies (all but J0337-0502 and J1157+3220) have imaging in the NUV and FUV available from GALEX (Martin+ 2005ApJ...619L...1M ; see II/335). Additionally, Wide-field Infrared Survey Explorer (WISE) W1 and W2 near-infrared (NIR) data are also available for the entire CLASSY sample. See Appendix C.

(6 data files).