FERMI LARGE AREA TELESCOPE OBSERVATION OF A GAMMA-RAY SOURCE AT THE POSITION OF ETA CARINAE

被引：60

作者：

Abdo, A. A. ^{[60
]}

Ackermann, M. ^{[1
,2
]}

Ajello, M. ^{[1
,2
]}

Allafort, A. ^{[1
,2
]}

Baldini, L. ^{[3
]}

Ballet, J. ^{[4
]}

Barbiellini, G. ^{[5
,6
]}

Bastieri, D. ^{[7
,8
]}

Bechtol, K. ^{[1
,2
]}

Bellazzini, R. ^{[3
]}

Berenji, B. ^{[1
,2
]}

Blandford, R. D. ^{[1
,2
]}

Bonamente, E. ^{[9
,10
]}

Borgland, A. W. ^{[1
,2
]}

Bouvier, A. ^{[1
,2
]}

Brandt, T. J. ^{[11
,12
]}

Bregeon, J. ^{[3
]}

Brez, A. ^{[3
]}

Brigida, M. ^{[13
,14
]}

Bruel, P. ^{[15
]}

Buehler, R. ^{[1
,2
]}

Burnett, T. H. ^{[16
]}

Caliandro, G. A. ^{[17
]}

Cameron, R. A. ^{[1
,2
]}

Caraveo, P. A. ^{[18
]}

Carrigan, S. ^{[8
]}

Casandjian, J. M. ^{[4
]}

Cecchi, C. ^{[9
,10
]}

Celik, Oe ^{[19
,20
,21
,22
]}

Chaty, S. ^{[4
]}

Chekhtman, A. ^{[23
,60
]}

Cheung, C. C. ^{[60
]}

Chiang, J. ^{[1
,2
]}

Ciprini, S. ^{[10
]}

Claus, R. ^{[1
,2
]}

Cohen-Tanugi, J. ^{[24
]}

Cominsky, L. R. ^{[25
]}

Conrad, J. ^{[26
,27
]}

Dermer, C. D. ^{[60
]}

de Palma, F. ^{[13
,14
]}

Digel, S. W. ^{[1
,2
]}

do Couto e Silva, E. ^{[1
,2
]}

Drell, P. S. ^{[1
,2
]}

Dubois, R. ^{[1
,2
]}

Dumora, D. ^{[28
,29
]}

Favuzzi, C. ^{[13
,14
]}

Fegan, S. J. ^{[15
]}

Ferrara, E. C. ^{[19
]}

Frailis, M. ^{[30
,31
,32
]}

Fukazawa, Y. ^{[33
]}

机构：

[1] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA

[2] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA

[3] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy

[4] Univ Paris Diderot, Lab AIM, CNRS, CEA Saclay,CEA,IRFU,Serv Astrophys, F-91191 Gif Sur Yvette, France

[5] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy

[6] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy

[7] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy

[8] Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy

[9] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy

[10] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy

[11] UPS, CNRS, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse 4, France

[12] Ohio State Univ, Dept Phys, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA

[13] Univ Politecn Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy

[14] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy

[15] Ecole Polytech, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France

[16] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[17] CSIC, IEEC, Inst Ciencies Espai, Barcelona 08193, Spain

[18] INAF Ist Astrofis Spaziale & Fis Cosm, I-20133 Milan, Italy

[19] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[20] NASA, CRESST, Greenbelt, MD 20771 USA

[21] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA

[22] Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, Baltimore, MD 21250 USA

[23] George Mason Univ, Fairfax, VA 22030 USA

[24] Univ Montpellier 2, CNRS, IN2P3, Lab Phys Theor & Astroparticules, Montpellier, France

[25] Sonoma State Univ, Dept Phys & Astron, Rohnert Pk, CA 94928 USA

[26] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden

[27] Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden

[28] Ctr Etud Nucl Bordeaux Gradignan, CNRS, UMR 5797, IN2P3, F-33175 Gradignan, France

[29] Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, UMR 5797, F-33175 Gradignan, France

[30] Univ Udine, Dipartimento Fis, I-33100 Udine, Italy

[31] Ist Nazl Fis Nucl, Sez Trieste, Grp Collegato Udine, I-33100 Udine, Italy

[32] Ist Nazl Astrofis, Osservatorio Astron Trieste, I-34143 Trieste, Italy

[33] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan

[34] Max Planck Inst Radioastron, D-53121 Bonn, Germany

[35] Univ Alabama, CSPAR, Huntsville, AL 35899 USA

[36] ICREA, Barcelona, Spain

[37] Univ Grenoble 1, CNRS, UMR 5571, Lab Astrophys Grenoble LAOG, F-38041 Grenoble 09, France

[38] Royal Inst Technol KTH, Dept Phys, SE-10691 Stockholm, Sweden

[39] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan

[40] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[41] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[42] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[43] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy

[44] Univ Denver, Dept Phys & Astron, Denver, CO 80208 USA

[45] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan

[46] JAXA, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan

[47] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany

[48] Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria

[49] Leopold Franzens Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria

[50] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Dept Phys, Santa Cruz, CA 95064 USA

来源：

ASTROPHYSICAL JOURNAL | 2010年 / 723卷 / 01期

关键词：

binaries: general; stars: individual (Eta Carinae); supergiants; EMISSION; CALIBRATION; SEARCHES; CATALOG;

D O I：

10.1088/0004-637X/723/1/649

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope detected a gamma-ray source that is spatially consistent with the location of Eta Carinae. This source has been persistently bright since the beginning of the LAT survey observations (from 2008 August to 2009 July, the time interval considered here). The gamma-ray signal is detected significantly throughout the LAT energy band (i.e., up to similar to 100 GeV). The 0.1-100 GeV energy spectrum is well represented by a combination of a cutoff power-law model (<10 GeV) and a hard power-law component (>10 GeV). The total flux (>100 MeV) is 3.7(-0.1)(+0.3) x 10(-7) photons s(-1) cm(-2), with additional systematic uncertainties of 10%, and consistent with the average flux measured by AGILE. The light curve obtained by Fermi is consistent with steady emission. Our observations do not confirm the presence of a gamma-ray flare in 2008 October, as reported by Tavani et al., although we cannot exclude that a flare lasting only a few hours escaped detection by the Fermi LAT. We also do not find any evidence for gamma-ray variability that correlates with the large X-ray variability of Eta Carinae observed during 2008 December and 2009 January. We are thus not able to establish an unambiguous identification of the LAT source with Eta Carinae.

引用

页码：649 / 657

页数：9

共 29 条

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Ackermann, M.
Ajello, M.
Allafort, A.
Antolini, E.
Atwood, W. B.
Axelsson, M.
Baldini, L.
Ballet, J.
Barbiellini, G.
Bastieri, D.
Baughman, B. M.
Bechtol, K.
Bellazzini, R.
Belli, F.
Berenji, B.
Bisello, D.
Blandford, R. D.
Bloom, E. D.
Bonamente, E.
Bonnell, J.
Borgland, A. W.
Bouvier, A.
Bregeon, J.
Brez, A.
Brigida, M.
Bruel, P.
Burnett, T. H.
Busetto, G.
Buson, S.
Caliandro, G. A.
Cameron, R. A.
Campana, R.
Canadas, B.
Caraveo, P. A.
Carrigan, S.
Casandjian, J. M.
Cavazzuti, E.
Ceccanti, M.
Cecchi, C.
Celik, Oe.
Charles, E.
Chekhtman, A.
Cheung, C. C.
Chiang, J.
Cillis, A. N.
Ciprini, S.
Claus, R.
Cohen-Tanugi, J.
Conrad, J.
[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2010, 188 (02) : 405 - 436
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Ackermann, M.
Ajello, M.
Atwood, W. B.
Axelsson, M.
Baldini, L.
Ballet, J.
Barbiellini, G.
Baring, M. G.
Bastieri, D.
Bechtol, K.
Bellazzini, R.
Berenji, B.
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.
Camilo, F.
Caraveo, P. A.
Casandjian, J. M.
Cecchi, C.
Celik, Oe.
Chekhtman, A.
Cheung, C. C.
Chiang, J.
Ciprini, S.
Claus, R.
Cognard, I.
Cohen-Tanugi, J.
Cominsky, L. R.
Conrad, J.
Dermer, C. D.
de Angelis, A.
de Luca, A.
de Palma, F.
Digel, S. W.
Silva, E. do Couto e
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Baring, M. G.
Bastieri, D.
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Bellazzini, R.
Berenji, B.
Bloom, E. D.
Bonamente, E.
Borgland, A. W.
Bregeon, J.
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Brigida, M.
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Caliandro, G. A.
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Camilo, F.
Caraveo, P. A.
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Cecchi, C.
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Cheung, C. C.
Chiang, J.
Ciprini, S.
Claus, R.
Cognard, I.
Cohen-Tanugi, J.
Conrad, J.
de Angelis, A.
de Palma, F.
Dormody, M.
do Couto e Silva, E.
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Dubois, R.
Dumora, D.
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Bellazzini, R.
Berenji, B.
Bignami, G. F.
Blandford, R. D.
Bloom, E. D.
Bonamente, E.
Borgland, A. W.
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Brez, A.
Brigida, M.
Bruel, P.
Burnett, T. H.
Caliandro, G. A.
Cameron, R. A.
Caraveo, P. A.
Casandjian, J. M.
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Celik, Oe
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Cheung, C. C.
Chiang, J.
Ciprini, S.
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Burnett, T. H.
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Cameron, R. A.
Caraveo, P. A.
Casandjian, J. M.
Cavazzuti, E.
Cecchi, C.
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Chekhtman, A.
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Baldini, L.
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Bastieri, D.
Baughman, B. M.
Bechtol, K.
Bellazzini, R.
Blandford, R. D.
Bloom, E. D.
Bonamente, E.
Borgland, A. W.
Bouvier, A.
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.
Charles, E.
Chekhtman, A.
Chen, A. W.
Cheung, C. C.
Chiang, J.
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Baring, M. G.
Bastieri, D.
Baughman, B. M.
Bechtol, K.
Bellazzini, R.
Berenji, B.
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.
Cecchi, C.
Charles, E.
Chekhtman, A.
Cheung, C. C.
Chiang, J.
Ciprini, S.
Claus, R.
Cohen-Tanugi, J.
Cominsky, L. R.
Conrad, J.
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← 1 2 3 →

共 29 条

[1] FERMI LARGE AREA TELESCOPE FIRST SOURCE CATALOG
Abdo, A. A.
Ackermann, M.
Ajello, M.
Allafort, A.
Antolini, E.
Atwood, W. B.
Axelsson, M.
Baldini, L.
Ballet, J.
Barbiellini, G.
Bastieri, D.
Baughman, B. M.
Bechtol, K.
Bellazzini, R.
Belli, F.
Berenji, B.
Bisello, D.
Blandford, R. D.
Bloom, E. D.
Bonamente, E.
Bonnell, J.
Borgland, A. W.
Bouvier, A.
Bregeon, J.
Brez, A.
Brigida, M.
Bruel, P.
Burnett, T. H.
Busetto, G.
Buson, S.
Caliandro, G. A.
Cameron, R. A.
Campana, R.
Canadas, B.
Caraveo, P. A.
Carrigan, S.
Casandjian, J. M.
Cavazzuti, E.
Ceccanti, M.
Cecchi, C.
Celik, Oe.
Charles, E.
Chekhtman, A.
Cheung, C. C.
Chiang, J.
Cillis, A. N.
Ciprini, S.
Claus, R.
Cohen-Tanugi, J.
Conrad, J.
[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2010, 188 (02) : 405 - 436
[2] FERMI LARGE AREA TELESCOPE OBSERVATIONS OF THE CRAB PULSAR AND NEBULA
Abdo, A. A.
Ackermann, M.
Ajello, M.
Atwood, W. B.
Axelsson, M.
Baldini, L.
Ballet, J.
Barbiellini, G.
Baring, M. G.
Bastieri, D.
Bechtol, K.
Bellazzini, R.
Berenji, B.
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.
Camilo, F.
Caraveo, P. A.
Casandjian, J. M.
Cecchi, C.
Celik, Oe.
Chekhtman, A.
Cheung, C. C.
Chiang, J.
Ciprini, S.
Claus, R.
Cognard, I.
Cohen-Tanugi, J.
Cominsky, L. R.
Conrad, J.
Dermer, C. D.
de Angelis, A.
de Luca, A.
de Palma, F.
Digel, S. W.
Silva, E. do Couto e
Drell, P. S.
Dubois, R.
Dumora, D.
Espinoza, C.
Farnier, C.
Favuzzi, C.
[J]. ASTROPHYSICAL JOURNAL, 2010, 708 (02) : 1254 - 1267
[3] FERMI LARGE AREA TELESCOPE DETECTION OF PULSED γ-RAYS FROM THE VELA-LIKE PULSARS PSR J1048-5832 AND PSR J2229+6114
Abdo, A. A.
Ackermann, M.
Ajello, M.
Atwood, W. B.
Axelsson, M.
Baldini, L.
Ballet, J.
Barbiellini, G.
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