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J/other/NewA/16.503   2MASS observation of BL Lac objects II.  (Mao+, 2011)

2MASS observation of BL Lac objects II. Mao L.S. <New Astron., 16, 503-529 (2011)> =2011NewA...16..503M
ADC_Keywords: BL Lac objects ; Infrared sources Keywords: BL Lacertae objects - Infrared Abstract: In this paper, we have searched for the Two Micron All Sky Survey (2MASS, Cat. II/246) counterparts of 1434 BL Lacs. 833 of 1434 BL Lacs (58%) have spatially coincident 2MASS counterparts. Fermi-detected BL Lacs (FBLs) have a much higher 2MASS detection rate than non-Fermi-detected BL Lacs (non-FBLs) (95% vs 49%). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 157 833 2MASS observational data of 833 BL Lacs
See also: I/297 : NOMAD Catalog (Zacharias+ 2005) II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) VII/258 : Quasars & Active Galactic Nuclei (13th Ed.) (Veron+ 2010) J/other/NewA/11.27 : 2MASS observation of BL Lac objects (Chen+, 2005) J/other/NewA/11.557 : Infrared photometry of BL Lac objects (Chen+, 2006) J/ApJ/715/429 : First Fermi-LAT AGN catalog (1LAC) (Abdo+, 2010) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number 5- 22 A18 --- Name Source name 24- 28 F5.3 --- z ? Confirmed redshift or lower limit 29 A1 --- l_z [a] a if redshift lower limit 31- 33 A3 --- Type Type Source type adopted from the VV13 (Cat. VII/258) catalog (1) 36 A1 --- FBL? [Y] Y if this BL Lac is in the LAC sample (Fermi-detected BL Lac, FBL) 38- 49 A12 --- NOMAD NOMAD (Cat. I/297) counterpart designation 51- 66 A16 --- 2MASS 2MASS (Cat. II/246) counterpart designation 67 A1 --- n_2MASS [*] * when source having more than one 2MASS counterpart 69- 72 F4.2 arcsec r1 Position difference between BL Lac and NOMAD counterpart positions 74- 77 F4.2 arcsec r2 Position difference between BL Lac and 2MASS counterpart positions 79- 84 F6.3 mag Jmag 2MASS J magnitude 86- 90 F5.3 mag e_Jmag ? rms uncertainty on Jmag 92- 97 F6.3 mag Hmag 2MASS H magnitude 99-103 F5.3 mag e_Hmag ? rms uncertainty on Hmag 105-110 F6.3 mag Ksmag 2MASS Ks magnitude 112-116 F5.3 mag e_Ksmag ? rms uncertainty on Ksmag 118-120 A3 --- Q2M [ABCDEU] 2MASS quality flags (2) 122-126 F5.3 mag AV Interstellar extinction coefficients from NED 127 A1 --- n_AV [Sb] Note on AV (3) 129-133 F5.2 --- alf.IR ?=- NIR spectral index α such that Fν∝ν 135-138 F4.2 --- e_alf.IR ?=- rms uncertainty on alf.IR 140-144 F5.2 [Hz] logFp ?=- Synchrotron peak frequency 146 I1 --- r_logFp ?=- Reference for Fpeak (4) 148-151 F4.2 --- dH ? Curvature parameter of the NIR spectrum, δH 152 A1 --- n_dH [c] c for low confidence curvature 154-157 F4.2 --- e_dH ? rms uncertainty on dH
Note (1): Source type as follows: BL = confirmed BL Lac BL? = probable BL Lac ? = questionable BL Lac HP = highly polarized BL Lac P = possible BL Lac Note (2): Quality flags at follows: A = SNR>10 B = 10>SNR> 7 C = 7>SNR> 5 D = 5>SNR U = only upper limit on magnitude E = very poor photometry Note (3): Notes as follows: b = source corrected for interstellar extinction S = unreliable AV value Note (4): References as follows: 1 = Nieppola et al., 2006, Cat. J/A+A/445/441 2 = Turriziani et al., 2007, Cat. J/A+A/472/699 3 = personal communication with Dr. Dario Gasparrini 4 = Laurent-Muehleisen et al., 1999, Cat. J/ApJ/525/127 5 = Perlman et al., 1996ApJS..104..251P 6 = BeppoSAX blazars catalog at ASDC, http://www.asdc.asi.it/blazars/
History: From electronic version of the journal References: Chen et al., Paper I 2005NewA...11...27C, Cat. J/other/NewA/11.27
(End) Patricia Vannier [CDS] 08-Dec-2011
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