Abdo AA, Ackermann M, Atwood WB, Bagagli R, Baldini L, Ballet J, Band DL, Barbiellini G, Baring MG, Bartelt J, Bastieri D, Baughman BM, Bechtol K, Bellardi F, Bellazzini R, Berenji B, Bisello D, Blandford RD, Bloom ED, Bogart JR, Bonamente E, Borgland AW, Bouvier A, Bregeon J, Brez A, Brigida M, Bruel P, Burnett TH, Caliandro GA, Cameron RA, Camilo F, Caraveo PA, Casandjian JM, Ceccanti M, Cecchi C, Charles E, Chekhtman A, Cheung CC, Chiang J, Ciprini S, Claus R, Cognard I, Cohen-Tanugi J, Cominsky LR, Conrad J, Corbet R, Corucci L, Cutini S, Davis DS, Deklotz M, Dermer CD, De Angelis A, De Palma F, Digel SW, Dormody M, Do Couto E Silva E, Drell PS, Dubois R, Dumora D, Espinoza CM, Farnier C, Favuzzi C, Flath DL, Fleury P, Focke WB, Frailis M, Friere PCC, 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 EV, Grenier IA, Grondin MH, Grove JE, Guillemot L, Guiriec S, Haller G, Harding AK, Hart PA, Hartman RC, Hays E, Hobbs G, Hughes RE, Johannesson G, Johnson AS, Johnson RP, Johnson TJ, Johnson WN, Johnston S, Kamae T, Kanbach G, Kaspi VM, Katagiri H, Kataoka J, Kavelaars A, Kawai N, Kelly H, Kerr M, Kiziltan B, Klamra W, Knodlseder J, Kramer M, Kuehn F, Kuss MW, Lande J, Landriu D, Latronico L, Lee B, Lee SH, Lemoine-Goumard M, Livingstone M, Longo F, Loparco F, Lott B, Lovellette MN, Lubrano P, Lyne AG, Madejski GM, Makeev A, Manchester RN, Marangelli B, Marelli M, Mazziotta MN, Mcenery JE, Mcglynn S, Mclaughlin MA, Menon N, Meurer C, Michelson PF, Mineo T, Mirizzi N, Mitthumsiri W, Mizuno T, Moiseev AA, Mongelli M, Monte C, Monzani ME, Moretti E, Morselli A, Moskalenko IV, Murgia S, Nakamori T, Nolan PL, Noutsos A, Nuss E, Ohsugi T, Omodei N, Orlando E, Ormes JF, Ozaki M, Paccagnella A, Paneque D, Panetta JH, Parent D, Pearce M, Pepe M, Perchiazzi M, Pesce-Rollins M, Pieri L, Pinchera M, Piron F, Porter TA, Raino S, Rando R, Ransom SM, Rapposelli E, Razzano M, Reimer A, Reimer O, Reposeur T, Reyes LC, Ritz S, Rochester LS, Rodriguez AY, Romani RW, Roth M, Ryde F, Sacchetti A, Sadrozinski HFW, Saggini N, Sanchez D, Sander A, Parkinson PMS, Segal KN, Sellerholm A, Sgro C, Siskind EJ, Smith DA, Smith PD, Spandre G, Spinelli P, Stamatikos M, Starck JL, Stecker FW, Stephens TE, Strickman MS, Strong AW, Suson DJ, Tajima H, Takahashi HH, Takahashi T, Tanaka T, Tenze A, Thayer JB, Thayer JG, Theureau G, Thompson DJ, Thorsett SE, Tibaldo L, Tibolla O, Torres DF, Tramacere A, Turri M, Usher TL, Vigiani L, Vilchez N, Vitale V, Waite AP, Wang P, Watters K, Weltevrede P, Winer BL, Wood KS, Ylinen T, Ziegler M (2009)
Publication Type: Journal article
Publication year: 2009
Book Volume: 696
Pages Range: 1084-1093
Journal Issue: 2
DOI: 10.1088/0004-637X/696/2/1084
The Vela pulsar is the brightest persistent source in the GeV sky and thus is the traditional first target for new gamma-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 Gamma = 1.51(-0.04)(+0.05) with an exponential cutoff at E-c = 2.9 +/- 0.1 GeV. Spectral fits with generalized cutoffs of the form e(-(E/Ec)b) 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.
APA:
Abdo, A.A., Ackermann, M., Atwood, W.B., Bagagli, R., Baldini, L., Ballet, J.,... Ziegler, M. (2009). FERMI LARGE AREA TELESCOPE OBSERVATIONS OF THE VELA PULSAR. Astrophysical Journal, 696(2), 1084-1093. https://dx.doi.org/10.1088/0004-637X/696/2/1084
MLA:
Abdo, A. A., et al. "FERMI LARGE AREA TELESCOPE OBSERVATIONS OF THE VELA PULSAR." Astrophysical Journal 696.2 (2009): 1084-1093.
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