2016A&A...594A..76A

Query : 2016A&A...594A..76A

2016A&A...594A..76A - Astronomy and Astrophysics, volume 594A, 76-76 (2016/10-1)

Very high energy outburst of Markarian 501 in May 2009.

ALIU E., ARCHAMBAULT S., ARCHER A., ARLEN T., AUNE T., BARNACKA A., BEHERA B., BEILICKE M., BENBOW W., BERGER K., BIRD R., BOTTCHER M., BOUVIER A., BUCHOVECKY M., BUCKLEY J.H., BUGAEV V., CARDENZANA J.V., CERRUTI M., CESARINI A., CHEN X., CIUPIK L., COLLINS-HUGHES E., CONNOLLY M.P., CUI W., DUMM J., EISCH J.D., FALCONE A., FEDERICI S., FENG Q., FINLEY J.P., FLEISCHHACK H., FORTIN P., FORTSON L., FURNISS A., GALANTE N., GALL D., GILLANDERS G.H., GRIFFIN S., GRIFFITHS S.T., GRUBE J., GYUK G., HUTTEN M., HAKANSSON N., HOLDER J., HUGHES G., HUMENSKY T.B., JOHNSON C.A., KAARET P., KAR P., KELLEY-HOSKINS N., KERTZMAN M., KHASSEN Y., KIEDA D., KRAUSE M., KRAWCZYNSKI H., KRENNRICH F., LANG M.J., MADHAVAN A.S., MAIER G., McARTHUR S., McCANN A., MEAGHER K., MILLIS J., MORIARTY P., MUKHERJEE R., NIETO D., O'FAOLAIN DE BHROITHE A., ONG R.A., ORR M., OTTE A.N., PANDEL D., PARK N., PELASSA V., PERKINS J.S., PICHEL A., POHL M., POPKOW A., QUINN J., RAGAN K., REYES L.C., REYNOLDS P.T., ROACHE E., ROUSSELLE J., ROVERO A.C., SAXON D.B., SEMBROSKI G.H., SHAHINYAN K., SHEIDAEI F., SKOLE C., SMITH A.W., STASZAK D., TELEZHINSKY I., THEILING M., TODD N.W., TUCCI J.V., TYLER J., VARLOTTA A., VASSILIEV V.V., VINCENT S., WAKELY S.P., WEINER O.M., WEINSTEIN A., WELSING R., WILHELM A., WILLIAMS D.A., ZITZER B., BARING M.G., BECERRA GONZALEZ J., CILLIS A.N., HORAN D., PANEQUE D. (The VERITAS Collaboration)

Abstract (from CDS):

The very high energy (VHE; E>100GeV) blazar Markarian 501 was observed between April 17 and May 5 (MJD 54938-54956), 2009, as part of an extensive multi-wavelength campaign from radio to VHE. Strong VHE γ-ray activity was detected on May 1st with Whipple and VERITAS, when the flux (E>400GeV) increased to 10 times the pre-flare baseline flux (3.9x10^–11ph/cm²/s), reaching five times the flux of the Crab Nebula. This coincided with a decrease in the optical polarization and a rotation of the polarization angle by 15deg. This VHE flare showed a fast flux variation with an increase of a factor ∼4 in 25-min, and a falling time of ∼50-min. We present the observations of the quiescent state previous to the flare and of the high state after the flare, focusing on the flux and spectral variability from Whipple, VERITAS, Fermi-LAT, RXTE, and Swift combined with optical and radio data.

Abstract Copyright: © ESO, 2016

Journal keyword(s): BL Lacertae objects: individual: Mrk 501 - gamma rays: galaxies

Simbad objects: 5

Full paper

View the references in ADS

Number of rows : 5

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2023	#notes
1	2MASX J00135605-1854066	BLL	00 13 56.0426451480	-18 54 06.702770232		17.01		15.82	~	67	0
2	M 1	SNR	05 34 30.9	+22 00 53					~	6092	1
3	Mrk 421	BLL	11 04 27.3140835504	+38 12 31.798495872		13.50	12.90	8.31	~	2615	1
4	2MASX J13150336-4236500	BLL	13 15 03.3912307368	-42 36 49.760844084		18.07	16.6	16.59	~	97	0
5	7C 165211.80+395026.00	BLL	16 53 52.21668403	+39 45 36.6088754	14.09	14.15	13.29	8.26	~	2108	2

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