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J/ApJ/731/118      R-band variability in blazar S5 0716+71      (Chandra+, 2011)

Rapid optical variability in blazar S5 0716+71 during 2010 March. Chandra S., Baliyan K.S., Ganesh S., Joshi U.C. <Astrophys. J., 731, 118 (2011)> =2011ApJ...731..118C
ADC_Keywords: BL Lac objects ; Photometry, RI Keywords: BL Lacertae objects: individual (S5 0716+71) - galaxies: active - galaxies: photometry - methods: observational Abstract: We report rapid optical variability for the blazar S5 0716+71 during 2010 March 8-10 and 19-20 in the CCD observations made from Mt. Abu Infrared Observatory. The light curves are constructed for a duration longer than 3hr each night, with very high temporal resolution (∼45s in the R band). During 2010 March 8, the source smoothly decayed by about 0.15mag in 2.88hr, apart from a fast flicker lasting about 30 minutes. S5 0716+71 brightened during March 9 and 10, showing high activity, while it was relatively faint (>14mag in the R band) albeit variable during March 19-20. During March 9 and 10, rapid flickers in the intensity modulated the long-term intra-night (∼3hr) variations. The present observations suggest that the blazar S5 0716+71 showed night-to-night and intra-night variability at various timescales with a 100% duty cycle for variation along with microvariability at significant levels. On a night-to-night basis, the source exhibits mild bluer-when-brighter nature. The interaction of shocks with local inhomogeneities in the jet appears to cause intra-night variations, while microvariations could be due to small-scale perturbations intrinsic to the jet. Description: The photometric observations were carried out by using the CCD Camera of the 1.2m Telescope at Mt. Abu Infrared Observatory, India, in Johnson-Cousins R filter. The source was observed in two observing slots: during 2010 March 8-10 and 2010 March 19-20. Objects: ------------------------------------------------------ RA (2000) DE Designation(s) ------------------------------------------------------ 07 21 53.45 +71 20 36.4 S5 0716+71 = QSO B0716+714 ------------------------------------------------------ File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 36 1034 R-band photometric data for S5 0716+71
See also: VII/258 : Quasars and Active Galactic Nuclei (13th Ed.) (Veron+ 2010) J/ApJS/189/1 : A 3.5mm polarimetric survey of radio-loud AGNs (Agudo+, 2010) J/ApJ/722/L7 : Fermi/LAT detected MOJAVE AGNs (Pushkarev+, 2010) J/ApJ/710/764 : Extended radio emission in MOJAVE blazars (Kharb+, 2010) J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010) J/ApJS/175/97 : CGRaBS: γ-ray blazar candidates (Healey+, 2008) J/A+A/466/63 : VLBI observations of BL Lac objects (Wu+, 2007) J/A+A/445/441 : SED of BL Lacertae objects (Nieppola+, 2006) J/ApJS/136/265 : Monitoring compact radio sources at 2.5+8.2GHz (Lazio+, 2001) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 11 A11 "YYYY/MMM/DD" Date Date of the observation 13- 23 F11.5 d MJD Modified Julian Date 25- 30 F6.3 mag Rmag Counsins R band magnitude 32- 36 F5.3 mag e_Rmag The 1σ uncertainty in Rmag
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 24-Oct-2012
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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