The discovery of the gamma-ray pulsar PSR J1836+5925, powering the formerly unidentified EGRET source 3EG J1835+5918, was one of the early accomplishments of the Fermi Large Area Telescope (LAT). Sitting 25 degrees off the Galactic plane, PSR J1836+5925 is a 173 ms pulsar with a characteristic age of 1.8 million years, a spindown luminosity of 1.1 x 10(34) erg s(-1), and a large off-peak (OP) emission component, making it quite unusual among the known gamma-ray pulsar population. We present an analysis of one year of LAT data, including an updated timing solution, detailed spectral results, and a long-term light curve showing no indication of variability. No evidence for a surrounding pulsar wind nebula is seen and the spectral characteristics of the OP emission indicate it is likely magnetospheric. Analysis of recent XMM-Newton observations of the X-ray counterpart yields a detailed characterization of its spectrum, which, like Geminga, is consistent with that of a neutron star showing evidence for both magnetospheric and thermal emission.

Fermi large area telescope observations of PSR J1836+5925 / Abdo, Aa; Ackermann, M; Ajello, M; Atwood, B; Baldini, L; Ballet, J; Barbiellini, G; Baring, Mg; Bastieri, D; Bechtol, K; Belfiore, A; Bellazzini, R; Berenji, B; Blandford, Rd; Bloom, Ed; Bonamente, E; Borgland, Aw; 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; Charles, E; Chekhtman, A; Cheung, Cc; Chiang, J; Ciprini, S; Claus, R; Cohen Tanugi, J; Conrad, J; de Angelis, A; de Luca, A; de Palma, F; Digel, Sw; Dormody, M; Silva, Ede; Drell, Ps; Dubois, R; Dumora, D; Edmonds, Y; Farnier, C; Favuzzi, Cecilia; Fegan, Sj; Focke, Wb; Fortin, P; Frailis, M; Fukazawa, Y; Funk, S; Fusco, P; Gargano, F; Gasparrini, D; Gehrels, N; Germani, S; Giavitto, G; Giglietto, Nicola; Giordano, F; Glanzman, T; Godfrey, G; Grenier, Ia; Grondin, Mh; Grove, Je; Guillemot, L; Guiriec, S; Gwon, C; Hadasch, D; Harding, Ak; Hays, E; Horan, D; Hughes, Re; Jackson, Ms; Johannesson, G; Johnson, As; Johnson, Rp; Johnson, Tj; Johnson, Wn; Kamae, T; Kanai, Y; Katagiri, H; Kataoka, J; Kawai, N; Kerr, M; Knodlseder, J; Kuss, M; Lande, J; Latronico, L; Lemoine Goumard, M; Longo, F; Loparco, F; Lott, B; Lovellette, Mn; Lubrano, P; Madejski, Gm; Makeev, A; Marelli, M; Mazziotta, Mn; Mcenery, Je; Meurer, C; Michelson, Pf; Mitthumsiri, W; Mizuno, T; Moiseev, Aa; Monte, C; Monzani, Me; Morselli, A; Moskalenko, Iv; Murgia, S; Nolan, Pl; Norris, Jp; Nuss, E; Ohsugi, T; Omodei, N; Orlando, E; Ormes, Jf; 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; Ray, Ps; Razzano, M; Rea, N; Reimer, A; Reimer, O; Reposeur, T; 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; Strickman, Ms; Suson, Dj; Takahashi, H; Tanaka, T; Thayer, Jb; Thayer, Jg; Thompson, Dj; Thorsett, Se; Tibaldo, L; Tibolla, O; Torres, Df; Tosti, G; Tramacere, A; Usher, Tl; Van Etten, A; Vasileiou, V; Venter, C; Vilchez, N; Vitale, V; Waite, Ap; Wang, P; Watters, K; Winer, Bl; Wolff, Mt; Wood, Ks; Ylinen, T; Ziegler, M.. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - ELETTRONICO. - 712:2(2010), pp. 1209-1218. [10.1088/0004-637X/712/2/1209]

Fermi large area telescope observations of PSR J1836+5925

FAVUZZI, Cecilia;GIGLIETTO, Nicola;
2010-01-01

Abstract

The discovery of the gamma-ray pulsar PSR J1836+5925, powering the formerly unidentified EGRET source 3EG J1835+5918, was one of the early accomplishments of the Fermi Large Area Telescope (LAT). Sitting 25 degrees off the Galactic plane, PSR J1836+5925 is a 173 ms pulsar with a characteristic age of 1.8 million years, a spindown luminosity of 1.1 x 10(34) erg s(-1), and a large off-peak (OP) emission component, making it quite unusual among the known gamma-ray pulsar population. We present an analysis of one year of LAT data, including an updated timing solution, detailed spectral results, and a long-term light curve showing no indication of variability. No evidence for a surrounding pulsar wind nebula is seen and the spectral characteristics of the OP emission indicate it is likely magnetospheric. Analysis of recent XMM-Newton observations of the X-ray counterpart yields a detailed characterization of its spectrum, which, like Geminga, is consistent with that of a neutron star showing evidence for both magnetospheric and thermal emission.
2010
Fermi large area telescope observations of PSR J1836+5925 / Abdo, Aa; Ackermann, M; Ajello, M; Atwood, B; Baldini, L; Ballet, J; Barbiellini, G; Baring, Mg; Bastieri, D; Bechtol, K; Belfiore, A; Bellazzini, R; Berenji, B; Blandford, Rd; Bloom, Ed; Bonamente, E; Borgland, Aw; 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; Charles, E; Chekhtman, A; Cheung, Cc; Chiang, J; Ciprini, S; Claus, R; Cohen Tanugi, J; Conrad, J; de Angelis, A; de Luca, A; de Palma, F; Digel, Sw; Dormody, M; Silva, Ede; Drell, Ps; Dubois, R; Dumora, D; Edmonds, Y; Farnier, C; Favuzzi, Cecilia; Fegan, Sj; Focke, Wb; Fortin, P; Frailis, M; Fukazawa, Y; Funk, S; Fusco, P; Gargano, F; Gasparrini, D; Gehrels, N; Germani, S; Giavitto, G; Giglietto, Nicola; Giordano, F; Glanzman, T; Godfrey, G; Grenier, Ia; Grondin, Mh; Grove, Je; Guillemot, L; Guiriec, S; Gwon, C; Hadasch, D; Harding, Ak; Hays, E; Horan, D; Hughes, Re; Jackson, Ms; Johannesson, G; Johnson, As; Johnson, Rp; Johnson, Tj; Johnson, Wn; Kamae, T; Kanai, Y; Katagiri, H; Kataoka, J; Kawai, N; Kerr, M; Knodlseder, J; Kuss, M; Lande, J; Latronico, L; Lemoine Goumard, M; Longo, F; Loparco, F; Lott, B; Lovellette, Mn; Lubrano, P; Madejski, Gm; Makeev, A; Marelli, M; Mazziotta, Mn; Mcenery, Je; Meurer, C; Michelson, Pf; Mitthumsiri, W; Mizuno, T; Moiseev, Aa; Monte, C; Monzani, Me; Morselli, A; Moskalenko, Iv; Murgia, S; Nolan, Pl; Norris, Jp; Nuss, E; Ohsugi, T; Omodei, N; Orlando, E; Ormes, Jf; 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; Ray, Ps; Razzano, M; Rea, N; Reimer, A; Reimer, O; Reposeur, T; 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; Strickman, Ms; Suson, Dj; Takahashi, H; Tanaka, T; Thayer, Jb; Thayer, Jg; Thompson, Dj; Thorsett, Se; Tibaldo, L; Tibolla, O; Torres, Df; Tosti, G; Tramacere, A; Usher, Tl; Van Etten, A; Vasileiou, V; Venter, C; Vilchez, N; Vitale, V; Waite, Ap; Wang, P; Watters, K; Winer, Bl; Wolff, Mt; Wood, Ks; Ylinen, T; Ziegler, M.. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - ELETTRONICO. - 712:2(2010), pp. 1209-1218. [10.1088/0004-637X/712/2/1209]
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