J/ApJS/218/18 2004-2012 BVRI observations of blazar S5 0716+714 (Dai+, 2015)
Long-term multi-band photometric monitoring of blazar S5 0716+714.
Dai B.-Z., Zeng W., Jiang Z.-J., Fan Z.-H., Hu W., Zhang P.-F., Yang Q.-Y.,
Yan D.-H., Wang D., Zhang L.
<Astrophys. J. Suppl. Ser., 218, 18 (2015)>
=2015ApJS..218...18D 2015ApJS..218...18D
ADC_Keywords: BL Lac objects ; Photometry, UBVRI
Keywords: BL Lacertae objects: general;
BL Lacertae objects: individual: S5 0716+714;
galaxies: active; galaxies: photometry
Abstract:
We present long-term optical multi-band photometric monitoring of
blazar S5 0716+714, from 2004 January 11 to 2012 November 4, with high
temporal resolution of approximately 15 minutes in the BVRI bands. The
source was in an active state during the whole monitoring campaign,
showing intraday variability in 11 of 72 days. The average magnitudes
in each band were B=14.398, V=13.821, R=13.255, and I=12.885. The
overall variability amplitudes were ΔB=1m.834, ,
ΔV=2m.167, ΔR=2m.148, and ΔI=1m.912. The
structure function showed that typical timescales for intraday
variability were between approximately 2 and 7.5hr. The intraday
variability amplitudes were from a few percent to approximately 30%.
We found typical variation rates of approximately 0.05 mag/hr in both
the rising and falling phases, with a minimal variability timescale of
130 minutes. A 10 day period short-term variability was observed
simultaneously in the BVRI bands. The discrete correlation function
suggests that there is significant correlated variability between the
B- and I-band light curves. However, no significant time lags were
detected. The spectral behaviors in the different variability episodes
were studied, and our observations show bluer-when-brighter behavior
on long, short, and intraday timescales for the blazar S5 0716+714.
The variability and relevant spectral trends can be explained by the
shock-in-jet scenario.
Description:
Our photometric observations of the blazar S5 0716+714 were performed
using three telescopes in China: the 1.02 and 2.4m optical telescopes
at Yunnan Astronomical Observatory (YAO1.02 and YAO2.4, respectively),
and the 1.56m telescope at Shanghai Astronomical Observatory (SHAO).
We used standard Johnson broadband filters with effective wavelength
midpoints of B=445nm, V=551nm, R=658nm, and I=806nm. During our
observation campaign from 2004 January 11 to 2012 November 4, we
observed 72 nights and 5186 CCD frames.
Objects:
---------------------------------------------------------
RA (ICRS) DE Designation(s)
---------------------------------------------------------
07 21 53.45 +71 20 36.4 S5 0716+714 = QSO B0716+714
---------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 58 911 B band observations of S5 0716+714
table4.dat 58 1319 V band observations of S5 0716+714
table5.dat 58 1532 R band observations of S5 0716+714
table6.dat 58 1424 I band observations of S5 0716+714
table7.dat 86 72 Complete observation log and daily
average magnitudes
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See also:
J/A+A/558/A92 : S5 0716+714 microvariability observation (Bhatta+, 2013)
J/A+A/552/A98 : Optical monitoring of extragalactic sources (Taris+, 2013)
J/MNRAS/435/1300 : Intranight optical variability of AGN (Goyal+, 2013)
J/ApJ/768/40 : R-band & polarimetry of blazar S5 0716+71 (Larionov+, 2013)
J/other/RAA/13.259 : γ-ray Doppler factor for Fermi blazars (Fan+, 2013)
J/ApJS/206/12 : Blazars with γ-ray counterparts. I. (D'Abrusco+, 2013)
J/AJ/144/105 : MOJAVE. VIII. Faraday rotation in AGN jets. (Hovatta+, 2012)
J/AJ/143/108 : B'V'R' photometry of the BL Lac object S5 0716+714 (Wu+, 2012)
J/ApJ/731/118 : R-band variability in blazar S5 0716+71 (Chandra+, 2011)
J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)
J/ApJS/185/511 : Optical microvariability of S5 0716+714 (Poon+, 2009)
J/A+A/495/691 : Multifrequency catalog of blazars, Roma-BZCAT (Massaro+, 2009)
J/ApJS/175/97 : CGRaBS: γ-ray blazar candidates survey (Healey+, 2008)
J/other/ChJAA/8.385 : Superluminal motion in AGN (Zhang+, 2008)
J/AJ/136/1846 : BVRI light curves of S5 0716+714 (Zhang+, 2008)
J/AJ/135/1384 : R-band variability in 5 blazars (Gupta+, 2008)
J/AJ/133/1599 : B'V'R' photometry of S5 0716+714 (Wu+, 2007)
J/AJ/133/303 : Optical microvariability in radio-quiet QSOs (Carini+, 2007)
J/A+A/472/763 : Multi-epoch VLBI survey of CJF sources (Britzen+, 2007)
J/A+A/451/435 : BV(RI)c photometry of S5 0716+714 (Montagni+, 2006)
J/A+A/450/39 : BVRI photometry of 8 red blazars (Gu+, 2006)
J/A+A/445/441 : SED of BL Lacertae objects (Nieppola+, 2006)
J/AZh/83/310 : BV(RI)c photometry of S5 0716+714 (Amirkhanyan+, 2006)
J/AJ/129/1818 : Photometry of S5 0716+714 (Wu+, 2005)
J/A+A/402/151 : S5 0716+714 UBVRI photometry (Raiteri+, 2003)
J/A+A/401/927 : The HRX-BL Lac sample (Beckmann+, 2003)
J/A+AS/143/357 : Tuorla Quasar Monitoring (Katajainen+ 2000)
J/A+A/327/61 : BV(RI)c photometry of S5 0716+714 (Ghisellini+ 1997)
Byte-by-byte Description of file: table[3456].dat
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Bytes Format Units Label Explanations
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1- 10 A10 "YYYY/MM/DD" Obs.date Observation date
12- 23 A12 "h:m:s" Obs.time Observation time (UT)
25- 38 F14.6 d JD Observation Julian Date
40- 45 F6.3 mag mag [11.9/15.2] Magnitude in band
(table3=B, table4=V, table5=R, table6=I)
47- 51 F5.3 mag e_mag [0.002/0.8] Error on mag
53- 58 F6.3 mag d65 [-0.8/1.2] Standard star differential
magnitude
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "YYYY/MM/DD" Date Average Observation date (UT)
12- 17 F6.3 mag Bmag [13.3/15.1]? Daily average Johnson B
magnitude
19- 23 F5.3 mag e_Bmag [0.007/0.3]? Uncertainty in Bmag
25- 27 I3 --- o_Bmag [1/186]? Number of Bmag observations
29- 34 F6.3 mag Vmag [12.7/14.7]? Daily average Johnson V
magnitude
36- 40 F5.3 mag e_Vmag [0.006/0.2]? Uncertainty in Vmag
42- 44 I3 --- o_Vmag [1/184]? Number of Vmag observations
46- 51 F6.3 mag Rmag [12.1/14.1]? Daily average Johnson R
magnitude
53- 57 F5.3 mag e_Rmag [0.002/0.8]? Uncertainty in Rmag
59- 61 I3 --- o_Rmag [1/186]? Number of Rmag observations
63- 68 F6.3 mag Imag [12/13.8]? Daily average Johnson I
magnitude
70- 74 F5.3 mag e_Imag [0.006/0.3]? Uncertainty in Imag
76- 78 I3 --- o_Imag [2/188]? Number of Imag observations
80- 86 A7 --- Tel Telescope (SHAO, YAO1.02 or YAO2.4)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Aug-2015