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J/ApJS/229/39   Narrow line Seyfert 1 galaxies from SDSS-DR12   (Rakshit+, 2017)

A catalog of narrow line Seyfert 1 galaxies from the Sloan Digital Sky Survey Data Release 12. Rakshit S., Stalin C.S., Chand H., Zhang X.-G. <Astrophys. J. Suppl. Ser., 229, 39-39 (2017)> =2017ApJS..229...39R (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Galaxies, spectra ; Spectroscopy ; Redshifts Keywords: galaxies: active; galaxies: Seyfert; techniques: imaging spectroscopy Abstract: We present a new catalog of narrow-line Seyfert 1 (NLSy1) galaxies from the Sloan Digital Sky Survey Data Release 12 (SDSS DR12). This was obtained by a systematic analysis through modeling of the continuum and emission lines of the spectra of all the 68859 SDSS-DR12 objects that are classified as "QSO" by the SDSS spectroscopic pipeline with z<0.8 and a median signal-to-noise ratio (S/N)>2/pixel. This catalog contains a total of 11101 objects, which is about 5 times larger than the previously known NLSy1 galaxies. Their monochromatic continuum luminosity at 5100Å is found to be strongly correlated with Hβ, Hα, and [OIII] emission line luminosities. The optical FeII strength in NLSy1 galaxies is about two times larger than the broad-line Seyfert 1 (BLSy1) galaxies. About 5% of the catalog sources are detected in the FIRST survey. The Eddington ratio (ξEdd) of NLSy1 galaxies has an average of log(ξEdd) of -0.34, much higher than -1.03 found for BLSy1 galaxies. Their black hole masses (MBH) have an average of log(MBH) of 6.9M, which is less than BLSy1 galaxies, which have an average of log(MBH) of 8.0M. The MBH of NLSy1 galaxies is found to be correlated with their host galaxy velocity dispersion. Our analysis suggests that geometrical effects playing an important role in defining NLSy1 galaxies and their MBH deficit is perhaps due to their lower inclination compared to BLSy1 galaxies. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 121 11101 Emission line properties of narrow-line Seyfert 1 (NLSy1) galaxies
See also: V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015) J/ApJ/806/109 : Rest-frame optical spectra of 3<z<6 QSOs (Jun+, 2015) J/MNRAS/438/557 : BLR-less AGNs in Stripe82 (Zhang, 2014) J/MNRAS/431/836 : Type 1 AGN at low z. III. (Stern+, 2013) J/AJ/143/83 : Properties of a sample of Seyfert 1 galaxies (Xu+, 2012) J/ApJS/199/3 : The quasars MMT-BOSS pilot survey (Ross+, 2012) J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011) J/ApJ/705/L76 : AGNs with double-peaked [OIII] lines (Wang+, 2009) J/ApJ/670/92 : New sample of low-mass black holes in AGN (Greene+, 2007) J/ApJS/166/128 : Narrow line Seyfert 1 galaxies from SDSS-DR3 (Zhou+, 2006) J/AJ/131/1948 : Narrow line Seyfert 1 galaxies in the FBQS (Whalen+, 2006) J/AJ/124/3042 : Narrow-line Seyfert 1 gal. from SDSS EDR (Williams+, 2002) J/A+A/309/81 : X-ray properties of AGN (Wang+, 1996) : SDSS-III home page Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 15 A15 --- Sp-ID SDSS identifier; plate-mjd-fiber 17- 25 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000) 27- 35 F9.5 deg DEdeg Declination in decimal degrees (J2000) 37- 42 F6.4 --- z [0.009/0.8] Spectroscopic redshift 44- 48 F5.2 [10-7W] logL5100 [41/46] Log nuclear monochromatic luminosity at 5100Å (in erg/s) 50- 54 I5 10-20W/m2 FHbb [6/19115] Broad Hβ component flux (1) 56- 58 I3 10-20W/m2 e_FHbb Uncertainty in FHbb (1) 60- 63 I4 km/s FWHMHbb [308/2200] Broad Hβ component FWHM 65- 67 I3 km/s e_FWHMHbb Uncertainty in FWHMHbb 69- 72 I4 10-20W/m2 FHbn [0/4255] Narrow Hβ component flux (1) 74- 76 I3 10-20W/m2 e_FHbn [0/808] Uncertainty in FHbn (1) 78- 82 I5 10-20W/m2 FO3 [0/17783] Total (broad+narrow) [OIII]5007Å flux (1) 84- 86 I3 10-20W/m2 e_FO3 [0/533] Uncertainty in FO3 (1) 88- 91 I4 km/s FWHMO3n [0/1201] Narrow [OIII]5007Å component FWHM 93- 95 I3 km/s e_FWHMO3n [0/212] Uncertainty in FWHMO3n 97-101 I5 10-20W/m2 FHab [0/60883]? Broad Hα component flux (1) 103-106 I4 10-20W/m2 e_FHab [0/5906]? Uncertainty in FHab (1) 108-111 I4 km/s FWHMHab [0/4234]? Broad Hα component FWHM 113-116 I4 km/s e_FWHMHab [0/2203]? Uncertainty in FWHMHab 118-121 F4.2 --- R4570 [0/4.6] Optical FeII strength relative to Hβ broad component
Note (1): In units of 1e-17erg/s/cm2.
History: From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 26-Jun-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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