J/ApJ/522/846 Optical monitoring of GeV loud blazars (Xie+, 1999)
Optical monitoring sample of the GeV gamma-ray-loud blazars
Xie G.Z., Li K.H., Zhang X., Bai J.M., Liu W.W.
<Astrophys. J. 522, 846 (1999)>
=1999ApJ...522..846X 1999ApJ...522..846X
ADC_Keywords: BL Lac objects ; Gamma rays ; Photometry
Keywords: BL Lacertae objects: general - gamma rays:
observations - radiation mechanism: nonthermal
Abstract:
We present optical monitoring between 1994 February and 1997 December
of 10 gamma-ray-loud blazars included in our blazar monitoring
program. Most of the monitored objects show significant rapid
variations. The typical minimum variability timescale in the optical
range is about 1 hour. We have analyzed the relationships between
optical variability and gamma-ray variability, and discussed
theoretical models for the gamma-rayloud blazar emission.
Objects:
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RA (2000) DE Designation(s)
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12 56 11.24 -05 47 21.8 3C 279 = QSO 1253-055
02 22 39.68 +43 02 07.8 3C 66A = QSO 0219+428
02 35 52.72 +16 24 04.0 AO 0235+164 = QSO 0235+164
07 38 07.45 +17 42 18.9 PKS 0735+178 = QSO 0735+1749
08 54 48.93 +20 06 30.5 OJ 287 = QSO 0851+202
12 29 06.69 +02 03 08.6 3C 273 = QSO 1226+023
16 42 58.90 +39 48 37.0 3C 345 = QSO 1641+3954
16 53 52.30 +39 45 36.7 Mrk 501 = QSO 1652+39
21 58 52.16 -30 13 31.8 PKS 2155-304 = QSO 2155-304
22 02 43.38 +42 16 40.0 BL Lac = QSO 2200+420
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 54 1246 Photometry of the gamma-ray-loud blazars
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See also:
J/A+AS/114/337 : CCD photometric observations of blazars (Jia Guibin+, 1995)
J/A+AS/117/475 : BVRcIc photometry of 10 blazars (Fiorucci+, 1996)
J/A+AS/121/119 : Optical monitoring of gamma-ray loud blazars. I
(Villata+ 1997)
J/A+AS/127/445 : Gamma-ray loud blazars optical monitoring. II.
(Raiteri+ 1998)
J/A+AS/128/315 : BVRI photometry of blazars (Jia Guibin+ 1998)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Object name
15- 18 I4 yr Obs.Y Year of observation (UT)
20- 22 A3 "month" Obs.M Month of observation (UT)
24- 25 I2 d Obs.D Day of observation (UT)
30- 41 F12.4 d JD Julian date of observation
43- 47 F5.2 mag Mag Magnitude of the observation
49- 52 F4.2 mag e_Mag RMS uncertainty in Mag
54 A1 --- f_Mag [BVIR] Indicates photometric filter used
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History:
From the ApJ electronic edition
(End) Greg Schwarz [AAS] 13-Mar-2000