2008A&A...481L..79V


C.D.S. - SIMBAD4 rel 1.7 - 2020.03.28CET10:00:18

2008A&A...481L..79V - Astronomy and Astrophysics, volume 481, L79-82 (2008/4-2)

Multifrequency monitoring of the blazar QSO 0716+714.

VILLATA M., RAITERI C.M., LARIONOV V.M., KURTANIDZE O.M., NILSSON K., ALLER M.F., TORNIKOSKI M., VOLVACH A., ALLER H.D., ARKHAROV A.A., BACH U., BELTRAME P., BHATTA G., BUEMI C.S., BOETTCHER M., CALCIDESE P., CAROSATI D., CASTRO-TIRADO A.J., DA RIO D., DI PAOLA A., DOLCI M., FORNE E., FRASCA A., HAGEN-THORN V.A., HEIDT J., HIRIART D., JELINEK M., KIMERIDZE G.N., KONSTANTINOVA T.S., KOPATSKAYA E.N., LANTERI L., LETO P., LIGUSTRI R., LINDFORS E., LAEHTEENMAEKI A., MARILLI E., NIEPPOLA E., NIKOLASHVILI M.G., PASANEN M., RAGOZZINE B., ROS J.A., SIGUA L.A., SMART R.L., SORCIA M., TAKALO L.O., TAVANI M., TRIGILIO C., TURCHETTI R., UCKERT K., UMANA G., VERCELLONE S. and WEBB J.R.

Abstract (from CDS):

Since the CGRO operation in 1991-2000, one of the primary unresolved questions about the blazar γ-ray emission has been its possible correlation with the low-energy (in particular optical) emission. To help answer this problem, the Whole Earth Blazar Telescope (WEBT) consortium has organized the GLAST-AGILE Support Program (GASP) to provide the optical-to-radio monitoring data to be compared with the γ-ray detections by the AGILE and GLAST satellites. This new WEBT project started in early September 2007, just before a strong γ-ray detection of 0716+714 by AGILE. We present the GASP-WEBT optical and radio light curves of this blazar obtained in July-November 2007, about various AGILE pointings at the source. We construct NIR-to-UV spectral energy distributions (SEDs), by assembling GASP-WEBT data together with UV data from the Swift ToO observations of late October. We observe a contemporaneous optical-radio outburst, which is a rare and interesting phenomenon in blazars. The shape of the SEDs during the outburst appears peculiarly wavy because of an optical excess and a UV drop-and-rise. The optical light curve is well sampled during the AGILE pointings, showing prominent and sharp flares. A future cross-correlation analysis of the optical and AGILE data will shed light on the expected relationship between these flares and the γ-ray events.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: BL Lacertae objects: general - galaxies: BL Lacertae objects: individual: S5 0716+71 - galaxies: jets

Status at CDS:  

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 QSO B0235+1624 BLL 02 38 38.93010 +16 36 59.2746   16.46 15.50 15.92   ~ 1381 2
2 8C 0716+714 BLL 07 21 53.4484901266 +71 20 36.362058601   15.5 14.17 14.27   ~ 1115 1

    Equat.    Gal    SGal    Ecl

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2020.03.28-10:00:18

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