Millisecond pulsars (MSPs) have been firmly established as a class of γ-ray emitters via the detection of pulsations above 0.1 GeV from eight MSPs by the Fermi Large Area Telescope (LAT). Using 13 months of LAT data, significant γ-ray pulsations at the radio period have been detected from the MSP PSR J0034–0534, making it the ninth clear MSP detection by the LAT. The γ-ray light curve shows two peaks separated by 0.274 ± 0.015 in phase which are very nearly aligned with the radio peaks, a phenomenon seen only in the Crab pulsar until now. The ≥0.1 GeV spectrum of this pulsar is well fit by an exponentially cutoff power law with a cutoff energy of 1.8 ± 0.6 ± 0.1 GeV and a photon index of 1.5 ± 0.2 ± 0.1, first errors are statistical and second are systematic. The near-alignment of the radio and γ-ray peaks strongly suggests that the radio and γ-ray emission regions are co-located and both are the result of caustic formation.
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Autori: | Abdo AA; Ackermann M; Ajello M; Allafort A; Baldini L; Ballet J; Barbiellini G; Bastieri D; Bechtol K; Bellazzini R; Berenji B; Blandford RD; Bloom ED; Bonamente E; Borgland AW; Bouvier A; Bregeon J; Brez A; Brigida M; Bruel P; Burnett TH; Buson S; Caliandro GA; Cameron RA; Camilo F; Caraveo PA; Carrigan S; Casandjian JM; Cecchi C; Celik O; Chekhtman A; Cheung CC; Chiang J; Ciprini S; Claus R; Cognard I; Cohen-Tanugi J; Conrad J; Corbet R; DeCesar ME; Dermer CD; Desvignes G; de Angelis A; de Palma F; Digel SW; Dormody M; Silva EDE; Drell PS; Dubois R; Dumora D; Espinoza C; Farnier C; Favuzzi C; Fegan SJ; Focke WB; Frailis M; Freire PCC; Fukazawa Y; Funk S; Fusco P; Gargano F; Gasparrini D; Gehrels N; Germani S; Giavitto G; Giglietto N; Giordano F; Glanzman T; Godfrey G; Grenier IA; Grondin MH; Grove JE; Guillemot L; Guiriec S; Hadasch D; Harding AK; Hays E; Hobbs G; Horan D; Hughes RE; Johannesson G; Johnson AS; Johnson TJ; Johnson WN; Johnston S; Kamae T; Katagiri H; Kataoka J; Kawai N; Kerr M; Knodlseder J; Kramer M; Kuss M; Lande J; Latronico L; Lemoine-Goumard M; Garde ML; Longo F; Loparco F; Lott B; Lovellette MN; Lubrano P; Lyne AG; Makeev A; Manchester RN; Marelli M; Mazziotta MN; McConville W; McEnery JE; McGlynn S; Meurer C; Michelson PF; Mitthumsiri W; Mizuno T; Moiseev AA; Monte C; Monzani ME; Morselli A; Moskalenko IV; Murgia S; Nolan PL; Norris JP; Noutsos A; Nuss E; Ohsugi T; Omodei N; Orlando E; Ormes JF; Ozaki M; Paneque D; Panetta JH; Parent D; Pelassa V; Pepe M; Pesce-Rollins M; Pierbattista M; Piron F; Porter TA; Raino S; Rando R; Ransom SM; Razzano M; Reimer A; Reimer O; Reposeur T; Ripken J; Ritz S; Rochester LS; Rodriguez AY; Romani RW; Roth M; Ryde F; Sadrozinski HFW; Sander A; Parkinson PMS; Scargle JD; Sgro C; Siskind EJ; Smith DA; Smith PD; Spandre G; Spinelli P; Stappers BW; Starck JL; Strickman MS; Suson DJ; Takahashi H; Tanaka T; Thayer JB; Thayer JG; Theureau G; Thompson DJ; Thorsett SE; Tibaldo L; Torres DF; Tosti G; Tramacere A; Usher TL; Van Etten A; Vasileiou V; Venter C; Vilchez N; Vitale V; Waite AP; Wallace E; Wang P; Weltevrede P; Winer BL; Wood KS; Ylinen T; Ziegler M |
Titolo: | DISCOVERY OF PULSED gamma-RAYS FROM PSR J0034-0534 WITH THE FERMI LARGE AREA TELESCOPE: A CASE FOR CO-LOCATED RADIO AND gamma-RAY EMISSION REGIONS |
Anno del prodotto: | 2010 |
Digital Object Identifier (DOI): | 10.1088/0004-637X/712/2/957 |
Appare nelle tipologie: | 1.1 Articolo in rivista |