J/AJ/142/170 ALFALFA survey: the {alpha}.40 HI source catalog (Haynes+, 2011) ================================================================================ The Arecibo Legacy Fast ALFA survey: the {alpha}.40 H I source catalog, its characteristics and their impact on the derivation of the H I mass function. Haynes M.P., Giovanelli R., Martin A.M., Hess K.M., Saintonge A., Adams E.A.K., Hallenbeck G., Hoffman G.L., Huang S., Kent B.R., Koopmann R.A., Papastergis E., Stierwalt S., Balonek T.J., Craig D.W., Higdon S.J.U., Kornreich D.A., Miller J.R., O'Donoghue A.A., Olowin R.P., Rosenberg J.L., Spekkens K., Troischt P., Wilcots E.M. =2011AJ....142..170H ================================================================================ ADC_Keywords: Galaxies, radio ; Redshifts ; H I data ; Photometry, SDSS ; Spectroscopy ; Surveys Keywords: catalogs - galaxies: distances and redshifts - galaxies: luminosity function, mass function - galaxies: spiral - radio lines: galaxies; surveys Abstract: We present a current catalog of 21cm HI line sources extracted from the Arecibo Legacy Fast Arecibo L-band Feed Array (ALFALFA) survey over ~2800deg^2^ of sky: the {alpha}.40 catalog. Covering 40% of the final survey area, the {alpha}.40 catalog contains 15855 sources in the regions 07h30m in Simbad). See also Catalogs J/AJ/113/22 and J/AJ/113/1197 Note (G2): Code as follows: 1 = Source of significant S/N and high quality insuring reliability. 2 = Source of slightly lower S/N which coincides with an optical counterpart of known, coincident redshift. 9 = Source without an optical counterpart whose velocity lies within the range expected for Galactic disk or HVC emission. Note (G3): Code as follows: I = "identified". The PhotoObjID is set but no other indicative flags have been applied; this code applies whether or not there is a SDSS spectroscopic counterpart. O = "outside DR7". The SDSS OC lies outside of the SDSS DR7 footprint and thus no DR7 crossmatch can be performed. U = "unidentified". No SDSS OC has been identified, but the object lies within the SDSS DR7 footprint. N = "no DR7 photometric ID". No SDSS DR7 photometric source has been identified; assignment of this code can result from proximity to a bright star, satellite trail, incomplete coverage or for other reasons. M = "missing". The OC is in the SDSS DR7 footprint region but neither a PhotoObjID or a SpecObjID are returned to queries of the SDSS DR7 database. P = "photometry suspect". The SDSS DR7 photometry for the associated PhotoObjID are suspect for some reason as judged by the ALFALFA team. Assignment of this code often is associated with the identification of multiple near-equal-flux photometric objects within an obviously single OC. Such cases apply often to very large optical objects or to faint, low surface brightness and/or patchy systems. The optical photometry associated with the SDSS "parent" object may be adequate but caution should be exercised. D = "displaced SDSS object". The SDSS Photo/SpectID is displaced from the optical galaxy center, as identified by ALFALFA team. The PhotoObjID may be legitimate; often this is brightest photometric "child:". Because of the displacement, the SDSS redshift may not reflect the systemic recessional velocity of the galaxy. T = "two SDSS objects". The SDSS PhotoObjID associated with the galaxy center is displaced from the target associated with the SDSS SpectObjID, as judged by the ALFALFA team, i.e., the best PhotoObjID does not coincide with the SpectObjID. Usually, the SpectObjID is an offcenter HII region or other bright knot within the target galaxy. S = "superposed SDSS object". The SDSS redshift corresponds to a superposed foreground star or background QSO. B = "bogus SDSS solution". The SDSS redshift is unreliable or rejected for some unspecified reason. -------------------------------------------------------------------------------- History: From electronic version of the journal References: Giovanelli et al., Paper I 2005AJ....130.2598G Giovanelli et al., Paper II 2005AJ....130.2613G, Cat. J/AJ/130/2613 Giovanelli et al., Paper III 2007AJ....133.2569G, Cat. J/AJ/133/2569 Saintonge, Paper IV 2007AJ....133.2087S Saintonge et al., Paper V 2008AJ....135..588S, Cat. J/AJ/135/588 Kent et al., Paper VI 2008AJ....136..713K, Cat. J/AJ/136/713 Kent et al., Paper VII 2009ApJ...691.1595K Martin et al., Paper VIII 2009ApJS..183..214M, Cat. J/ApJS/183/214 Stierwalt et al., Paper IX 2009AJ....138..338S, Cat. J/AJ/138/338 Martin et al., Paper X 2010ApJ...723.1359M Huang et al., Galaxy pop. 2012ApJ...756..113H ================================================================================ (End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 14-Mar-2013