2010ApJ...721.1383A

Query : 2010ApJ...721.1383A

2010ApJ...721.1383A - Astrophys. J., 721, 1383-1396 (2010/October-1)

Fermi gamma-ray space telescope observations of gamma-ray outbursts from 3C 454.3 in 2009 December and 2010 April.

ACKERMANN M., AJELLO M., BALDINI L., BALLET J., BARBIELLINI G., BASTIERI D., BECHTOL K., BELLAZZINI R., BERENJI B., BLANDFORD R.D., BONAMENTE E., BORGLAND A.W., BREGEON J., BRIGIDA M., BRUEL P., BUEHLER R., BURNETT T.H., BUSON S., CALIANDRO G.A., CAMERON R.A., CARAVEO P.A., CARRIGAN S., CASANDJIAN J.M., CAVAZZUTI E., CECCHI C., CELIK O., CHEKHTMAN A., CHEUNG C.C., CHIANG J., CIPRINI S., CLAUS R., COHEN-TANUGI J., CORBEL S., CUTINI S., D'AMMANDO F., DERMER C.D., DE ANGELIS A., DE PALMA F., DIGEL S.W., DO COUTO E SILVA E., DRELL P.S., DUBOIS R., DUMORA D., ESCANDE L., FAVUZZI C., FEGAN S.J., FERRARA E.C., FUHRMANN L., FUKAZAWA Y., FUSCO P., GARGANO F., GASPARRINI D., GEHRELS N., GERMANI S., GIEBELS B., GIGLIETTO N., GIOMMI P., GIORDANO F., GIROLETTI M., GLANZMAN T., GODFREY G., GRENIER I.A., GROVE J.E., GUIRIEC S., HADASCH D., HAYASHIDA M., HAYS E., JOHANNESSON G., JOHNSON A.S., JOHNSON W.N., KAMAE T., KATAGIRI H., KATAOKA J., KNODLSEDER J., KUSS M., LANDE J., LARSSON S., LATRONICO L., LEE S.-H., GARDE M.L., LONGO F., LOPARCO F., LOTT B., LUBRANO P., MADEJSKI G.M., MAKEEV A., MARCHILI N., MAZZIOTTA M.N., McENERY J.E., MEHAULT J., MICHELSON P.F., MIZUNO T., MONTE C., MONZANI M.E., MORSELLI A., MOSKALENKO I.V., MURGIA S., NAKAMORI T., NALEWAJKO K., NAUMANN-GODO M., NOLAN P.L., NORRIS J.P., NUSS E., OHSUGI T., OKUMURA A., OMODEI N., ORLANDO E., ORMES J.F., PELASSA V., PEPE M., PESCE-ROLLINS M., PIRON F., PORTER T.A., RAINO S., RANDO R., RAZZANO M., REIMER A., REIMER O., REYES L.C., RIPKEN J., RITZ S., ROTH M., SADROZINSKI H.F.-W., SANCHEZ D., SANDER A., SCARGLE J.D., SGRO C., SIKORA M., SISKIND E.J., SPANDRE G., SPINELLI P., STRICKMAN M.S., SUSON D.J., TAKAHASHI H., TAKAHASHI T., TANAKA T., TANAKA Y., THAYER J.B., THAYER J.G., THOMPSON D.J., TIBALDO L., TORRES D.F., TOSTI G., TRAMACERE A., USHER T.L., VANDENBROUCKE J., VILCHEZ N., VITALE V., WAITE A.P., WANG P., WEHRLE A.E., WINER B.L., YANG Z., YLINEN T. and ZIEGLER M.

Abstract (from CDS):

The flat spectrum radio quasar 3C 454.3 underwent an extraordinary outburst in 2009 December when it became the brightest γ-ray source in the sky for over 1 week. Its daily flux measured with the Fermi-Large Area Telescope at photon energies E>100 MeV reached F100= 22±1x10–6 photon/cm2/s, representing the highest daily flux of any blazar ever recorded in high-energy γ-rays. It again became the brightest source in the sky in 2010 April, triggering a pointed-mode observation by Fermi. The correlated γ-ray temporal and spectral properties during these exceptional events are presented and discussed. The main results show flux variability over time scales less than 3 hr and very mild spectral variability with an indication of gradual hardening preceding major flares. The light curves during periods of enhanced activity in 2008 July-August and 2010 December show strong resemblance, with a flux plateau of a few days preceding the major flare. No consistent loop pattern emerged in the γ-ray spectral index versus the flux plane as would be expected in acceleration and cooling scenarios. The maximum energy of a photon from 3C 454.3 is 20 GeV and a minimum Doppler factor of 13 is derived. The γ-ray spectrum of 3C 454.3 shows a significant spectral break between 2 and 3 GeV that is very weakly dependent on the flux state, even when the flux changes by an order of magnitude.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - gamma rays: galaxies - quasars: individual: 3C 454.3

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Vela SNR 08 34.0 -45 50           ~ 1331 2
2 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
3 QSO B1502+1041 Bla 15 04 24.97978391 +10 29 39.1985309   18.97 18.56 18.94   ~ 634 1
4 QSO J1512-0906 Bla 15 12 50.53293048 -09 05 59.8297908   16.74 16.54     ~ 1409 1
5 QSO J1626-2951 Bla 16 26 06.02084013 -29 51 26.9712990   18.41 20.5 17.6   ~ 452 1
6 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 3004 2

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