2012ApJ...749...26B

Query : 2012ApJ...749...26B

2012ApJ...749...26B - Astrophys. J., 749, 26 (2012/April-2)

Gamma-ray activity in the Crab nebula: the exceptional flare of 2011 April.

BUEHLER R., SCARGLE J.D., BLANDFORD R.D., BALDINI L., BARING M.G., BELFIORE A., CHARLES E., CHIANG J., D'AMMANDO F., DERMER C.D., FUNK S., GROVE J.E., HARDING A.K., HAYS E., KERR M., MASSARO F., MAZZIOTTA M.N., ROMANI R.W., SAZ PARKINSON P.M., TENNANT A.F. and WEISSKOPF M.C.

Abstract (from CDS):

The Large Area Telescope on board the Fermi satellite observed a gamma-ray flare in the Crab Nebula lasting for approximately nine days in April of 2011. The source, which at optical wavelengths has a size of ~11 lt-yr across, doubled its gamma-ray flux within eight hours. The peak photon flux was (186±6)x10–7/cm2/s above 100 MeV, which corresponds to a 30-fold increase compared to the average value. During the flare, a new component emerged in the spectral energy distribution, which peaked at an energy of (375±26) MeV at flare maximum. The observations imply that the emission region was likely relativistically beamed toward us and that variations in its motion are responsible for the observed spectral variability.

Abstract Copyright: ∼

Journal keyword(s): gamma rays: stars - ISM: supernova remnants - magnetic reconnection - magnetohydrodynamics, MHD - pulsars: individual: Crab - radiation mechanisms: non-thermal

Simbad objects: 4

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Number of rows : 4
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 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
2 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
3 PSR J0633+1746 Psr 06 33 54.153 +17 46 12.91           ~ 1308 0
4 NAME Vela SNR 08 34.0 -45 50           ~ 1331 2

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