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 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 157 833 2MASS observational data of 833 BL Lacs
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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
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Bytes Format Units Label Explanations
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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-α
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
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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 1996ApJS..104..251P
6 = BeppoSAX blazars catalog at ASDC, http://www.asdc.asi.it/blazars/
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History:
From electronic version of the journal
References:
Chen et al., Paper I 2005NewA...11...27C 2005NewA...11...27C, Cat. J/other/NewA/11.27
(End) Patricia Vannier [CDS] 08-Dec-2011