2009ApJ...699...31A

Query : 2009ApJ...699...31A

2009ApJ...699...31A - Astrophys. J., 699, 31-39 (2009/July-1)

Fermi discovery of gamma-ray emission from NGC 1275.

ABDO A.A., ACKERMANN M., AJELLO M., ASANO K., BALDINI L., BALLET J., BARBIELLINI G., BASTIERI D., BAUGHMAN B.M., BECHTOL K., BELLAZZINI R., BLANDFORD R.D., BLOOM E.D., BONAMENTE E., BORGLAND A.W., BREGEON J., BREZ A., BRIGIDA M., BRUEL P., BURNETT T.H., CALIANDRO G.A., CAMERON R.A., CARAVEO P.A., CASANDJIAN J.M., CAVAZZUTI E., CECCHI C., CELOTTI A., CHEKHTMAN A., CHEUNG C.C., CHIANG J., CIPRINI S., CLAUS R., COHEN-TANUGI J., COLAFRANCESCO S., COMINSKY L.R., CONRAD J., COSTAMANTE L., DERMER C.D., DE ANGELIS A., DE PALMA F., DIGEL S.W., DONATO D., DO COUTO E SILVA E., DRELL P.S., DUBOIS R., DUMORA D., FARNIER C., FAVUZZI C., FINKE J., FOCKE W.B., FRAILIS M., FUKAZAWA Y., FUNK S., FUSCO P., GARGANO F., GEORGANOPOULOS M., GERMANI S., GIEBELS B., GIGLIETTO N., GIORDANO F., GLANZMAN T., GRENIER I.A., GRONDIN M.-H., GROVE J.E., GUILLEMOT L., GUIRIEC S., HANABATA Y., HARDING A.K., HARTMAN R.C., HAYASHIDA M., HAYS E., HUGHES R.E., JOHANNESSON G., JOHNSON A.S., JOHNSON R.P., JOHNSON W.N., KADLER M., KAMAE T., KANAI Y., KATAGIRI H., KATAOKA J., KAWAI N., KERR M., KNODLSEDER J., KUEHN F., KUSS M., LATRONICO L., LEMOINE-GOUMARD M., LONGO F., LOPARCO F., LOTT B., LOVELLETTE M.N., LUBRANO P., MADEJSKI G.M., MAKEEV A., MAZZIOTTA M.N., McENERY J.E., MEURER C., MICHELSON P.F., MITTHUMSIRI W., MIZUNO T., MOISEEV A.A., MONTE C., MONZANI M.E., MORSELLI A., MOSKALENKO I.V., MURGIA S., NAKAMORI T., NOLAN P.L., NORRIS J.P., NUSS E., OHSUGI T., OMODEI N., ORLANDO E., ORMES J.F., PANEQUE D., PANETTA J.H., PARENT D., PEPE M., PESCE-ROLLINS M., PIRON F., PORTER T.A., RAINO S., RAZZANO M., REIMER A., REIMER O., REPOSEUR T., RITZ S., RODRIGUEZ A.Y., ROMANI R.W., RYDE F., SADROZINSKI H.F.-W., SAMBRUNA R., SANCHEZ D., SANDER A., SATO R., SAZ PARKINSON P.M., SGRO C., SMITH D.A., SMITH P.D., SPANDRE G., SPINELLI P., STARCK J.-L., STRICKMAN M.S., STRONG A.W., SUSON D.J., TAJIMA H., TAKAHASHI H., TAKAHASHI T., TANAKA T., TAYLOR G.B., THAYER J.G., THOMPSON D.J., TORRES D.F., TOSTI G., UCHIYAMA Y., USHER T.L., VILCHEZ N., VITALE V., WAITE A.P., WOOD K.S., YLINEN T., ZIEGLER M., ALLER H.D., ALLER M.F., KELLERMANN K.I., KOVALEV Y.Y., KOVALEV Yu.A., LISTER M.L. and PUSHKAREV A.B.

Abstract (from CDS):

We report the discovery of high-energy (E > 100 MeV) γ-ray emission from NGC 1275, a giant elliptical galaxy lying at the center of the Perseus cluster of galaxies, based on observations made with the Large Area Telescope (LAT) of the Fermi Gamma-ray Space Telescope. The positional center of the γ-ray source is only ~3' away from the NGC 1275 nucleus, well within the 95% LAT error circle of ~5'. The spatial distribution of γ-ray photons is consistent with a point source. The average flux and power-law photon index measured with the LAT from 2008 August 4 to 2008 December 5 are Fγ= (2.10±0.23)x10–7 ph (>100 MeV)/cm2/s and Γ = 2.17±0.05, respectively. The measurements are statistically consistent with constant flux during the four-month LAT observing period. Previous EGRET observations gave an upper limit of Fγ< 3.72x10–8 ph (>100 MeV)/cm2/s to the γ-ray flux from NGC 1275. This indicates that the source is variable on timescales of years to decades, and therefore restricts the fraction of emission that can be produced in extended regions of the galaxy cluster. Contemporaneous and historical radio observations are also reported. The broadband spectrum of NGC 1275 is modeled with a simple one-zone synchrotron/synchrotron self-Compton model and a model with a decelerating jet flow.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: individual: NGC 1275 - galaxies: jets - gamma rays: observations - radiation mechanisms: non-thermal

Simbad objects: 14

goto Full paper

goto View the references in ADS

Number of rows : 14
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 3C 66A BLL 02 22 39.6114771888 +43 02 07.799534304   15.71 15.21 14.5   ~ 942 2
2 NGC 1273 GiG 03 19 26.7462872568 +41 32 25.750682808   14.7 14.20     ~ 66 0
3 NGC 1274 GiG 03 19 40.5524463936 +41 32 55.060863864   15.1       ~ 52 0
4 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
5 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
6 NGC 1277 GiG 03 19 51.4854427512 +41 34 24.934439244   14.9       ~ 235 0
7 NGC 1278 GiG 03 19 54.1310495136 +41 33 48.273592464   14.4 14.14     ~ 105 0
8 NGC 1279 GiG 03 19 59.0521548984 +41 28 46.596625608   16       ~ 28 0
9 NAME Per Region reg 03 37 00.0 +31 15 00           ~ 296 0
10 3C 111 Sy1 04 18 21.2772425736 +38 01 35.801359968   19.75 18.05     ~ 1002 2
11 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
12 NGC 6251 Bla 16 32 31.96989253 +82 32 16.3999044 15.24 14.66 12.89 7.62   ~ 772 1
13 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1
14 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1

To bookmark this query, right click on this link: simbad:objects in 2009ApJ...699...31A and select 'bookmark this link' or equivalent in the popup menu