SIMBAD references

2013ApJ...762...92A - Astrophys. J., 762, 92 (2013/January-2)

Rapid TeV gamma-ray flaring of BL Lacertae.

ARLEN T., AUNE T., BEILICKE M., BENBOW W., BOUVIER A., BUCKLEY J.H., BUGAEV V., CESARINI A., CIUPIK L., CONNOLLY M.P., CUI W., DICKHERBER R., DUMM J., ERRANDO M., FALCONE A., FEDERICI S., FENG Q., FINLEY J.P., FINNEGAN G., FORTSON L., FURNISS A., GALANTE N., GALL D., GRIFFIN S., GRUBE J., GYUK G., HANNA D., HOLDER J., HUMENSKY T.B., KAARET P., KARLSSON N., KERTZMAN M., KHASSEN Y., KIEDA D., KRAWCZYNSKI H., KRENNRICH F., MAIER G., MORIARTY P., MUKHERJEE R., NELSON T., O'FAOLAIN DE BHROITHE A., ONG R.A., ORR M., PARK N., PERKINS J.S., PICHEL A., POHL M., PROKOPH H., QUINN J., RAGAN K., REYES L.C., REYNOLDS P.T., ROACHE E., SAXON D.B., SCHROEDTER M., SEMBROSKI G.H., STASZAK D., TELEZHINSKY I., TESIC G., THEILING M., TSURUSAKI K., VARLOTTA A., VINCENT S., WAKELY S.P., WEEKES T.C., WEINSTEIN A., WELSING R., WILLIAMS D.A., ZITZER B. (The VERITAS Collaboration), JORSTAD S.G., MacDONALD N.R., MARSCHER A.P., SMITH P.S., WALKER R.C., HOVATTA T., RICHARDS J., MAX-MOERBECK W., READHEAD A., LISTER M.L., KOVALEV Y.Y., PUSHKAREV A.B., GURWELL M.A., LAHTEENMAKI A., NIEPPOLA E., TORNIKOSKI M. and JARVELA E.

Abstract (from CDS):

We report on the detection of a very rapid TeV gamma-ray flare from BL Lacertae on 2011 June 28 with the Very Energetic Radiation Imaging Telescope Array System (VERITAS). The flaring activity was observed during a 34.6 minute exposure, when the integral flux above 200 GeV reached (3.4±0.6)x10^–6 photons m^–2/s, roughly 125% of the Crab Nebula flux measured by VERITAS. The light curve indicates that the observations missed the rising phase of the flare but covered a significant portion of the decaying phase. The exponential decay time was determined to be 13±4 minutes, making it one of the most rapid gamma-ray flares seen from a TeV blazar. The gamma-ray spectrum of BL Lacertae during the flare was soft, with a photon index of 3.6±0.4, which is in agreement with the measurement made previously by MAGIC in a lower flaring state. Contemporaneous radio observations of the source with the Very Long Baseline Array revealed the emergence of a new, superluminal component from the core around the time of the TeV gamma-ray flare, accompanied by changes in the optical polarization angle. Changes in flux also appear to have occurred at optical, UV, and GeV gamma-ray wavelengths at the time of the flare, although they are difficult to quantify precisely due to sparse coverage. A strong flare was seen at radio wavelengths roughly four months later, which might be related to the gamma-ray flaring activities. We discuss the implications of these multiwavelength results.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: individual (BL Lacertae, VER J2202+422) - gamma rays: galaxies

CDS comments: Knot K11 is not in SIMBAD.

Simbad objects: 11

Full paper

View the references in ADS

To bookmark this query, right click on this link: simbad:2013ApJ...762...92A and select 'bookmark this link' or equivalent in the popup menu