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. =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 {Delta}B=1^m^.834, , {Delta}V=2^m^.167, {Delta}R=2^m^.148, and {Delta}I=1^m^.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: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- 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 : {gamma}-ray Doppler factor for Fermi blazars (Fan+, 2013) J/ApJS/206/12 : Blazars with {gamma}-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: {gamma}-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 -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table7.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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) -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Aug-2015