2009ApJ...696.1084A

Query : 2009ApJ...696.1084A

2009ApJ...696.1084A - Astrophys. J., 696, 1084-1093 (2009/May-2)

Fermi large area telescope observations of the Vela pulsar.

ABDO A.A., ACKERMANN M., ATWOOD W.B., BAGAGLI R., BALDINI L., BALLET J., BAND D.L., BARBIELLINI G., BARING M.G., BARTELT J., BASTIERI D., BAUGHMAN B.M., BECHTOL K., BELLARDI F., BELLAZZINI R., BERENJI B., BISELLO D., BLANDFORD R.D., BLOOM E.D., BOGART J.R., BONAMENTE E., BORGLAND A.W., BOUVIER A., BREGEON J., BREZ A., BRIGIDA M., BRUEL P., BURNETT T.H., CALIANDRO G.A., CAMERON R.A., CAMILO F., CARAVEO P.A., CASANDJIAN J.M., CECCANTI M., CECCHI C., CHARLES E., CHEKHTMAN A., CHEUNG C.C., CHIANG J., CIPRINI S., CLAUS R., COGNARD I., COHEN-TANUGI J., COMINSKY L.R., CONRAD J., CORBET R., CORUCCI L., CUTINI S., DAVIS D.S., DEKLOTZ M., DERMER C.D., DE ANGELIS A., DE PALMA F., DIGEL S.W., DORMODY M., DO COUTO E SILVA E., DRELL P.S., DUBOIS R., DUMORA D., ESPINOZA C., FARNIER C., FAVUZZI C., FLATH D.L., FLEURY P., FOCKE W.B., FRAILIS M., FRIERE P.C.C., FUKAZAWA Y., FUNK S., FUSCO P., GARGANO F., GASPARRINI D., GEHRELS N., GERMANI S., GIANNITRAPANI R., GIEBELS B., GIGLIETTO N., GIORDANO F., GLANZMAN T., GODFREY G., GOTTHELF E.V., GRENIER I.A., GRONDIN M.-H., GROVE J.E., GUILLEMOT L., GUIRIEC S., HALLER G., HARDING A.K., HART P.A., HARTMAN R.C., HAYS E., HOBBS G., HUGHES R.E., JOHANNESSON G., JOHNSON A.S., JOHNSON R.P., JOHNSON T.J., JOHNSON W.N., JOHNSTON S., KAMAE T., KANBACH G., KASPI V.M., KATAGIRI H., KATAOKA J., KAVELAARS A., KAWAI N., KELLY H., KERR M., KIZILTAN B., KLAMRA W., KNODLSEDER J., KRAMER M., KUEHN F., KUSS M., LANDE J., LANDRIU D., LATRONICO L., LEE B., LEE S.-H., LEMOINE-GOUMARD M., LIVINGSTONE M., LONGO F., LOPARCO F., LOTT B., LOVELLETTE M.N., LUBRANO P., LYNE A.G., MADEJSKI G.M., MAKEEV A., MANCHESTER R.N., MARANGELLI B., MARELLI M., MAZZIOTTA M.N., McENERY J.E., McGLYNN S., McLAUGHLIN M.A., MENON N., MEURER C., MICHELSON P.F., MINEO T., MIRIZZI N., MITTHUMSIRI W., MIZUNO T., MOISEEV A.A., MONGELLI M., MONTE C., MONZANI M.E., MORETTI E., MORSELLI A., MOSKALENKO I.V., MURGIA S., NAKAMORI T., NOLAN P.L., NOUTSOS A., NUSS E., OHSUGI T., OMODEI N., ORLANDO E., ORMES J.F., OZAKI M., PACCAGNELLA A., PANEQUE D., PANETTA J.H., PARENT D., PEARCE M., PEPE M., PERCHIAZZI M., PESCE-ROLLINS M., PIERI L., PINCHERA M., PIRON F., PORTER T.A., RAINO S., RANDO R., RANSOM S.M., RAPPOSELLI E., RAZZANO M., REIMER A., REIMER O., REPOSEUR T., REYES L.C., RITZ S., ROCHESTER L.S., RODRIGUEZ A.Y., ROMANI R.W., ROTH M., RYDE F., SACCHETTI A., SADROZINSKI H.F.-W., SAGGINI N., SANCHEZ D., SANDER A., SAZ PARKINSON P.M., SEGAL K.N., SELLERHOLM A., SGRO C., SISKIND E.J., SMITH D.A., SMITH P.D., SPANDRE G., SPINELLI P., STAMATIKOS M., STARCK J.-L., STECKER F.W., STEPHENS T.E., STRICKMAN M.S., STRONG A.W., SUSON D.J., TAJIMA H., TAKAHASHI H., TAKAHASHI T., TANAKA T., TENZE A., THAYER J.B., THAYER J.G., THEUREAU G., THOMPSON D.J., THORSETT S.E., TIBALDO L., TIBOLLA O., TORRES D.F., TRAMACERE A., TURRI M., USHER T.L., VIGIANI L., VILCHEZ N., VITALE V., WAITE A.P., WANG P., WATTERS K., WELTEVREDE P., WINER B.L., WOOD K.S., YLINEN T. and ZIEGLER M.

Abstract (from CDS):

The Vela pulsar is the brightest persistent source in the GeV sky and thus is the traditional first target for new γ-ray observatories. We report here on initial Fermi Large Area Telescope observations during verification phase pointed exposure and early sky survey scanning. We have used the Vela signal to verify Fermi timing and angular resolution. The high-quality pulse profile, with some 32,400 pulsed photons at E ≥ 0.03 GeV, shows new features, including pulse structure as fine as 0.3 ms and a distinct third peak, which shifts in phase with energy. We examine the high-energy behavior of the pulsed emission; initial spectra suggest a phase-averaged power-law index of Γ = 1.51+0.05–0.04 with an exponential cutoff at Ec= 2.9±0.1 GeV. Spectral fits with generalized cutoffs of the form require b ≤ 1, which is inconsistent with magnetic pair attenuation, and thus favor outer-magnetosphere emission models. Finally, we report on upper limits to any unpulsed component, as might be associated with a surrounding pulsar wind nebula.

Abstract Copyright: ∼

Journal keyword(s): gamma rays: observations - pulsars: individual: PSR B0833-45

Simbad objects: 5

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Number of rows : 5
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
5 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545     15.10     ~ 2446 1

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