Prof Subir Sarkar: Publications

IceCube

IceCube at Oxford

I am a member since 2004 of the IceCube collaboration which discovered cosmic high energy neutrinos and identified some of their astrophysical sources.

IceCube @ Oxford

High-energy neutrinos from astrophysical accelerators of cosmic ray nuclei

(2007)

Authors:

Luis A Anchordoqui, Dan Hooper, Subir Sarkar, Andrew M Taylor

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Anisotropy studies around the galactic centre at EeV energies with the Auger Observatory

Astroparticle Physics 27:4 (2007) 244-253

Authors:

J Abraham, M Aglietta, C Aguirre, D Allard, I Allekotte, P Allison, C Alvarez, J Alvarez-Muñiz, M Ambrosio, L Anchordoqui, JC Anjos, C Aramo, K Arisaka, E Armengaud, F Arneodo, F Arqueros, T Asch, H Asorey, BS Atulugama, J Aublin, M Ave, G Avila, J Bacelar, T Bäcker, D Badagnani, AF Barbosa, HMJ Barbosa, M Barkhausen, D Barnhill, SLC Barroso, P Bauleo, J Beatty, T Beau, BR Becker, KH Becker, JA Bellido, S BenZvi, C Berat, T Bergmann, P Bernardini, X Bertou, PL Biermann, P Billoir, O Blanch-Bigas, F Blanco, P Blasi, C Bleve, H Blümer, P Boghrat, M Boháčová, C Bonifazi, R Bonino, M Boratav, J Brack, JM Brunet, P Buchholz, NG Busca, KS Caballero-Mora, B Cai, DV Camin, JN Capdevielle, R Caruso, A Castellina, G Cataldi, L Cazón, R Cester, J Chauvin, A Chiavassa, JA Chinellato, A Chou, J Chye, D Claes, PDJ Clark, RW Clay, SB Clay, B Connolly, A Cordier, U Cotti, S Coutu, CE Covault, J Cronin, S Dagoret-Campagne, TD Quang, P Darriulat, K Daumiller, BR Dawson, RM de Almeida, LA de Carvalho, C De Donato, SJ de Jong, WJM de Mello, JRT de Mello Neto, I De Mitri, MAL de Oliveira, V de Souza, L del Peral, O Deligny, AD Selva, CD Fratte, H Dembinski

Abstract:

Data from the Pierre Auger Observatory are analyzed to search for anisotropies near the direction of the Galactic Centre at EeV energies. The exposure of the surface array in this part of the sky is already significantly larger than that of the fore-runner experiments. Our results do not support previous findings of localized excesses in the AGASA and SUGAR data. We set an upper bound on a point-like flux of cosmic rays arriving from the Galactic Centre which excludes several scenarios predicting sources of EeV neutrons from Sagittarius A. Also the events detected simultaneously by the surface and fluorescence detectors (the 'hybrid' data set), which have better pointing accuracy but are less numerous than those of the surface array alone, do not show any significant localized excess from this direction. © 2006 Elsevier B.V. All rights reserved.

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The intergalactic propagation of ultrahigh energy cosmic ray nuclei

Astropart.Phys. 27 (2007) 199-212

Authors:

Dan Hooper, Subir Sarkar, Andrew M Taylor

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Limits on the high-energy gamma and neutrino fluxes from the SGR 1806-20 giant flare of 27 December 2004 with the AMANDA-II detector.

Phys Rev Lett 97:22 (2006) 221101

Authors:

A Achterberg, M Ackermann, J Adams, J Ahrens, K Andeen, DW Atlee, JN Bahcall, X Bai, B Baret, M Bartelt, SW Barwick, R Bay, K Beattie, T Becka, JK Becker, K-H Becker, P Berghaus, D Berley, E Bernardini, D Bertrand, DZ Besson, E Blaufuss, DJ Boersma, C Bohm, J Bolmont, S Böser, O Botner, A Bouchta, J Braun, C Burgess, T Burgess, T Castermans, D Chirkin, B Christy, J Clem, DF Cowen, MV D'Agostino, A Davour, CT Day, C De Clercq, L Demirörs, F Descamps, P Desiati, T Deyoung, JC Diaz-Velez, J Dreyer, JP Dumm, MR Duvoort, WR Edwards, R Ehrlich, J Eisch, RW Ellsworth, PA Evenson, O Fadiran, AR Fazely, T Feser, K Filimonov, BD Fox, TK Gaisser, J Gallagher, R Ganugapati, H Geenen, L Gerhardt, A Goldschmidt, JA Goodman, R Gozzini, S Grullon, A Gross, RM Gunasingha, M Gurtner, A Hallgren, F Halzen, K Han, K Hanson, D Hardtke, R Hardtke, T Harenberg, JE Hart, T Hauschildt, D Hays, J Heise, K Helbing, M Hellwig, P Herquet, GC Hill, J Hodges, KD Hoffman, B Hommez, K Hoshina, D Hubert, B Hughey, PO Hulth, K Hultqvist, S Hundertmark, J-P Hülss, A Ishihara, J Jacobsen, GS Japaridze, A Jones, JM Joseph, K-H Kampert, A Karle, H Kawai, JL Kelley, M Kestel, N Kitamura, SR Klein, S Klepser, G Kohnen, H Kolanoski, L Köpke, M Krasberg, K Kuehn, H Landsman, H Leich, I Liubarsky, J Lundberg, J Madsen, K Mase, HS Matis, T McCauley, CP McParland, A Meli, T Messarius, P Mészáros, H Miyamoto, A Mokhtarani, T Montaruli, A Morey, R Morse, SM Movit, K Münich, R Nahnhauer, JW Nam, P Niessen, DR Nygren, H Ogelman, Ph Olbrechts, A Olivas, S Patton, C Peña-Garay, C Pérez de Los Heros, A Piegsa, D Pieloth, AC Pohl, R Porrata, J Pretz, PB Price, GT Przybylski, K Rawlins, S Razzaque, F Refflinghaus, E Resconi, W Rhode, M Ribordy, A Rizzo, S Robbins, P Roth, C Rott, D Rutledge, D Ryckbosch, H-G Sander, S Sarkar, S Schlenstedt, T Schmidt, D Schneider, D Seckel, SH Seo, S Seunarine, A Silvestri, AJ Smith, M Solarz, C Song, JE Sopher, GM Spiczak, C Spiering, M Stamatikos, T Stanev, P Steffen, T Stezelberger, RG Stokstad, MC Stoufer, S Stoyanov, EA Strahler, T Straszheim, K-H Sulanke, GW Sullivan, TJ Sumner, I Taboada, O Tarasova, A Tepe, L Thollander, S Tilav, PA Toale, D Turcan, N van Eijndhoven, J Vandenbroucke, A Van Overloop, B Voigt, W Wagner, C Walck, H Waldmann, M Walter, Y-R Wang, C Wendt, CH Wiebusch, G Wikström, DR Williams, R Wischnewski, H Wissing, K Woschnagg, XW Xu, G Yodh, S Yoshida, JD Zornoza, IceCube Collaboration

Abstract:

On 27 December 2004, a giant gamma flare from the Soft Gamma-Ray Repeater 1806-20 saturated many satellite gamma-ray detectors, being the brightest transient event ever observed in the Galaxy. AMANDA-II was used to search for down-going muons indicative of high-energy gammas and/or neutrinos from this object. The data revealed no significant signal, so upper limits (at 90% C.L.) on the normalization constant were set: 0.05(0.5) TeV-1 m;{-2} s;{-1} for gamma=-1.47 (-2) in the gamma flux and 0.4(6.1) TeV-1 m;{-2} s;{-1} for gamma=-1.47 (-2) in the high-energy neutrino flux.

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Einstein's Universe: The Challenge of Dark Energy

Chapter in The Legacy of Albert Einstein, World Scientific Publishing (2006) 207-224

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Prof Subir Sarkar

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IceCube

IceCube at Oxford

High-energy neutrinos from astrophysical accelerators of cosmic ray nuclei

Authors:

Anisotropy studies around the galactic centre at EeV energies with the Auger Observatory

Authors:

Abstract:

The intergalactic propagation of ultrahigh energy cosmic ray nuclei

Authors:

Limits on the high-energy gamma and neutrino fluxes from the SGR 1806-20 giant flare of 27 December 2004 with the AMANDA-II detector.

Authors:

Abstract:

Einstein's Universe: The Challenge of Dark Energy

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Prof Subir Sarkar

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IceCube

IceCube at Oxford

High-energy neutrinos from astrophysical accelerators of cosmic ray nuclei

Authors:

Anisotropy studies around the galactic centre at EeV energies with the Auger Observatory

Authors:

Abstract:

The intergalactic propagation of ultrahigh energy cosmic ray nuclei

Authors:

Limits on the high-energy gamma and neutrino fluxes from the SGR 1806-20 giant flare of 27 December 2004 with the AMANDA-II detector.

Authors:

Abstract:

Einstein's Universe: The Challenge of Dark Energy