J/ApJ/626/95 Gamma-ray blazar candidates (Sowards-Emmerd+, 2005)
A northern survey of gamma-ray blazar candidates.
Sowards-Emmerd D., Romani R.W., Michelson P.F., Healey S.E., Nolan P.L.
<Astrophys. J., 626, 95-103 (2005)>
=2005ApJ...626...95S 2005ApJ...626...95S
ADC_Keywords: BL Lac objects ; Radio sources ; Gamma rays
Keywords: BL Lacertae objects: general - gamma rays: observations
Abstract:
In preparation for the Gamma-Ray Large Area Space Telescope (GLAST),
we have compiled a sample of blazar candidates to increase the pool of
well-studied active galactic nuclei from which GLAST counterparts will
be drawn.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 74 710 Figure-of-Merit-selected objects
table2.dat 28 74 X-Ray-selected targets
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See also:
VIII/40 : GB6 catalog of radio sources (Gregory+ 1996)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VIII/72 : CLASS survey of radio sources (Myers+, 2003)
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
IX/29 : ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000)
J/ApJS/123/79 : Third EGRET catalog (3EG) (Hartman+, 1999)
J/ApJS/135/155 : Radio identification of 3EG EGRET sources (Mattox+, 2001)
J/AJ/115/1253 : Deep X-Ray Radio Blazar Survey (DXRBS). I. (Perlman+ 1998)
J/ApJ/590/109 : Gamma-ray blazar in northern sky (Sowards-Emmerd+, 2003)
J/ApJ/609/564 : Blazar counterparts for 3EG sources (Sowards-Emmerd+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Name Source name (JHHMMSS.ss+DDMMSS.s)
21- 25 F5.3 --- FoM Figure of Merit (1)
27- 31 F5.3 --- P(Prod) ? Product probability (2)
33- 37 F5.3 --- P(Peak) ? Peak probability (2)
39- 45 F7.1 mJy S8.4GHz The 8.4GHz flux density
47- 51 F5.2 --- SpIndex Radio spectral index
53- 57 F5.3 ct/s Cts ROSAT All-Sky Survey count rate
59- 62 F4.1 mag Rmag ? The USNO B1.0 R2 magnitude
64- 68 F5.3 --- z ? Redshift
69 A1 --- u_z Uncertainty flag on z
71 A1 --- Type Source classification (G1)
73 I1 --- Origin Origin of Spectroscopy (4)
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Note (1): The figure of merit is the combination of the fractional excesses for
each of the counterpart candidate's properties with the estimate of
the positional probability:
FoM=n8.4GHz*nα*nX-ray*L(α,δ).
Sources with FoM>1 are designated as "likely" counterparts, and
0.25<FoM<1.0 as "plausible" counterparts.
Note (2): γ-ray probabilities are only listed for sources that survive
our spatial cuts.
Note (4): Origin of spectroscopy, defined as follows:
0 = No info;
1 = Archival;
2 = Our McDonald Observatory spectroscopy;
3 = Our McDonald Observatory spectroscopy of a featureless BL Lac;
4 = Our McDonald Observatory spectroscopy in addition to archival data;
5 = Archival featureless BL Lac.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Name Source name (JHHMMSS.ss+DDMMSS.s)
21- 26 F6.4 --- z ? Redshift
28 A1 --- Type Source classification (G1)
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Global Notes:
Note (G1): Source classification, defined as follows:
F = FSRQ (flat spectrum radio quasar)
B = BL Lac object,
N = NLRG (narrow-line radio galaxy)
G = Galaxy
S = Star
E = passive elliptical
? = undecided
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 30-Nov-2005