VizieR Online Data Catalog: WISE view of narrow-line Seyfert 1 galaxies (Rakshit+, 2019)
Abstract
For this work, we have taken all NLSy1 galaxies from the catalogue of Rakshit et al. (2017ApJS..229...39R, Cat. J/ApJS/229/39), the selection of which was based on the spectroscopic database of the Sloan Digital Sky Survey Data Release 12 (SDSS DR12; Alam et al. 2015ApJS..219...12A, Cat. V/147). The catalogue consists of a total of 11 101 NLSy1 galaxies. Since the main motivation of this work is to characterize the IR variability properties of the population of NLSy1 galaxies, we looked for the IR counterparts to these sources in the Wide-field Infrared Survey Explorer (WISE; Wright et al. 2010AJ....140.1868W) database. WISE has mapped the entire sky in four different IR bands centred at 3.4μm (W1 band), 4.6μm (W2 band), 12μm (W3 band), and 22μm (W4 band) with angular resolution of 6.1, 6.4, 6.5, and 12arcsec, respectively. It has much higher sensitivity than any previous all sky surveys in IR. WISE has a field of view of 47arcminx47arcmin and scans the entire sky once in every six months. The observations were performed (i) under WISE full cryogenic and NEOWISE Post-Cryo mission in three windows in 2010-2011 in W1, W2, W3, and W4 bands. All photometric magnitudes from this mission are included in the 'AllWISE MultiEpoch Photometry (MEP) Database' and (ii) under the near-Earth objects WISE (NEOWISE) Reactivation mission (Mainzer et al. 2014ApJ...792...30M, Cat. J/ApJ/792/30) in eight windows in 2014-2017 in W1 and W2 bands.
Variability information of all the 492 candidate variables are provided in Table 1. (1 data file).- Publication:
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VizieR Online Data Catalog
- Pub Date:
- July 2022
- Bibcode:
- 2022yCat..74832362R
- Keywords:
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- Galaxies: photometry;
- Galaxies: Seyfert;
- Photometry: infrared;
- Galaxies: IR