2009ApJ...698L..94A

Query : 2009ApJ...698L..94A

2009ApJ...698L..94A - Astrophys. J., 698, L94-L97 (2009/June-3)

Evidence for long-term gamma-ray and X-ray variability from the unidentified TeV source HESS J0632+057.

ACCIARI V.A., ALIU E., ARLEN T., BEILICKE M., BENBOW W., BOLTUCH D., BRADBURY S.M., BUCKLEY J.H., BUGAEV V., BYRUM K., CANNON A., CESARINI A., CHOW Y.C., CIUPIK L., COGAN P., DICKHERBER R., DUKE C., ERGIN T., FALCONE A., FEGAN S.J., FINLEY J.P., FINNEGAN G., FORTIN P., FORTSON L., FURNISS A., GIBBS K., GILLANDERS G.H., GRUBE J., GUENETTE R., GYUK G., HANNA D., HOLDER J., HORAN D., HUI C.M., HUMENSKY T.B., IMRAN A., KAARET P., KARLSSON N., KERTZMAN M., KIEDA D., KILDEA J., KONOPELKO A., KRAWCZYNSKI H., KRENNRICH F., LANG M.J., LEBOHEC S., MAIER G., McCANN A., McCUTCHEON M., MILLIS J., MORIARTY P., MUKHERJEE R., ONG R.A., OTTE A.N., PANDEL D., PERKINS J.S., PETRY D., POHL M., QUINN J., RAGAN K., REYES L.C., REYNOLDS P.T., ROSE H.J., SCHROEDTER M., SEMBROSKI G.H., SMITH A.W., STEELE D., SWORDY S., THEILING M., TONER J.A., VARLOTTA A., VASSILIEV V.V., VINCENT S., WAGNER R.G., WAKELY S.P., WARD J.E., WEEKES T.C., WEINSTEIN A., WEISGARBER T., WILLIAMS D.A., WISSEL S. and WOOD M.

Abstract (from CDS):

HESS J0632+057 is one of only two unidentified very-high-energy gamma-ray sources which appear to be point-like within experimental resolution. It is possibly associated with the massive Be star MWC 148 and has been suggested to resemble known TeV binary systems like LS I +61 303 or LS 5039. HESS J0632+057 was observed by VERITAS for 31 hr in 2006, 2008, and 2009. During these observations, no significant signal in gamma rays with energies above 1 TeV was detected from the direction of HESS J0632+057. A flux upper limit corresponding to 1.1% of the flux of the Crab Nebula has been derived from the VERITAS data. The nondetection by VERITAS excludes with a probability of 99.993% that HESS J0632+057 is a steady gamma-ray emitter. Contemporaneous X-ray observations with the Swift X-Ray Telescope reveal a factor of 1.8±0.4 higher flux in the 1-10 keV range than earlier X-ray observations of HESS J0632+057. The variability in the gamma-ray and X-ray fluxes supports interpretation of the object as a gamma-ray emitting binary.

Abstract Copyright: ∼

Journal keyword(s): acceleration of particles - binaries: general - gamma rays: observations - stars: individual (HESS J0632+057, MWC 148)

CDS comments: PSR B1959-63 is a misprint for PSR B1259-63.

Simbad objects: 11

goto Full paper

goto View the references in ADS

Number of rows : 11
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 LS I +61 303 HXB 02 40 31.6644419688 +61 13 45.593918580 11.27 11.61 10.75 10.19 9.55 B0Ve 852 2
2 M 1 SNR 05 34 30.9 +22 00 53           ~ 6191 1
3 PSR J0631+0646 Psr 06 31 52.38 +06 46 14.2           ~ 18 0
4 2EG J0635+0521 BL? 06 32 51.3 +05 50 43           ~ 28 0
5 HD 259440 HXB 06 32 59.2566076656 +05 48 01.160755848 9.17 9.63 9.15     B0pe 220 0
6 GeV J0633+0645 gam 06 33 08.8 +06 45 49           ~ 6 1
7 PSR J0633+0632 Psr 06 33 44.136 +06 32 29.48           ~ 79 1
8 NAME MONOCEROS NEB SNR 06 38 43 +06 30.2           ~ 250 0
9 CPD-63 2495 HXB 13 02 47.6544015048 -63 50 08.626970292 10.34 10.72 9.98 10.03   O9.5Ve 790 0
10 V* V479 Sct HXB 18 26 15.0561548880 -14 50 54.247274304 12.02 12.23 11.27 11.04   ON6V((f))z 571 2
11 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4334 0

To bookmark this query, right click on this link: simbad:objects in 2009ApJ...698L..94A and select 'bookmark this link' or equivalent in the popup menu