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

REVIEW OF PARTICLE PHYSICS Particle Data Group

86:1 (2012) ARTN 010001

Authors:

J Beringer, J-F Arguin, RM Barnett, K Copic, O Dahl, DE Groom, C-J Lin, J Lys, H Murayama, CG Wohl, W-M Yao, PA Zyla, C Amsler, M Antonelli, DM Asner, H Baer, HR Band, T Basaglia, CW Bauer, JJ Beatty, VI Belousov, E Bergren, G Bernardi, W Bertl, S Bethke, H Bichsel, O Biebel, E Blucher, S Blusk, G Brooijmans, O Buchmueller, RN Cahn, M Carena, A Ceccucci, D Chakraborty, M-C Chen, RS Chivukula, G Cowan, G D'Ambrosio, T Damour, D de Florian, A de Gouvea, T DeGrand, P de Jong, G Dissertori, B Dobrescu, M Doser, M Drees, DA Edwards, S Eidelman, J Erler, VV Ezhela, W Fetscher, BD Fields, B Foster, TK Gaisser, L Garren, H-J Gerber, G Gerbier, T Gherghetta, S Golwala, M Goodman, C Grab, AV Gritsan, J-F Grivaz, M Grunewald, A Gurtu, T Gutsche, HE Haber, K Hagiwara, C Hagmann, C Hanhart, S Hashimoto, KG Hayes, M Heffner, B Heltsley, JJ Hernandez-Rey, K Hikasa, A Hoecker, J Holder, A Holtkamp, J Huston, JD Jackson, KF Johnson, T Junk, D Karlen, D Kirkby, SR Klein, E Klempt, RV Kowalewski, F Krauss, M Kreps, B Krusche, Yu V Kuyanov, Y Kwon, O Lahav, J Laiho, P Langacker, A Liddle, Z Ligeti, TM Liss, L Littenberg, KS Lugovsky, SB Lugovsky, T Mannel, AV Manohar, WJ Marciano, AD Martin, A Masoni, J Matthews, D Milstead, R Miquel, K Moenig, F Moortgat, K Nakamura, M Narain, P Nason, S Navas, M Neubert, P Nevski, Y Nir, KA Olive, L Pape, J Parsons, C Patrignani, JA Peacock, ST Petcov, A Piepke, A Pomarol, G Punzi, A Quadt, S Raby, G Raffelt, BN Ratcliff, P Richardson, S Roesler, S Rolli, A Romaniouk, LJ Rosenberg, JL Rosner, CT Sachrajda, Y Sakai, GP Salam, S Sarkar, F Sauli, O Schneider, K Scholberg, D Scott, WG Seligman, MH Shaevitz, SR Sharpe, M Silari, T Sjostrand, P Skands, JG Smith, GF Smoot, S Spanier, H Spieler, A Stahl, T Stanev, SL Stone, T Sumiyoshi, MJ Syphers, F Takahashi, M Tanabashi, J Terning, M Titov, NP Tkachenko, NA Tornqvist, D Tovey, G Valencia, K van Bibber, G Venanzoni, MG Vincter, P Vogel, A Vogt, W Walkowiak, CW Walter, DR Ward, T Watari, G Weiglein, EJ Weinberg, LR Wiencke, L Wolfenstein, J Womersley, CL Woody, RL Workman, A Yamamoto, GP Zeller, OV Zenin, J Zhang, R-Y Zhu

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Second-order Fermi acceleration as the origin of the Fermi bubbles

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 692 (2012) 265-268

Authors:

Philipp Mertsch, Subir Sarkar

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Search for ultrahigh energy neutrinos in highly inclined events at the Pierre Auger Observatory

Physical Review D - Particles, Fields, Gravitation and Cosmology 84:12 (2011)

Authors:

P Abreu, M Aglietta, EJ Ahn, IFM Albuquerque, D Allard, I Allekotte, J Allen, P Allison, J Alvarez Castillo, J Alvarez-Muñiz, M Ambrosio, A Aminaei, L Anchordoqui, S Andringa, T Antičić, A Anzalone, C Aramo, E Arganda, F Arqueros, H Asorey, P Assis, J Aublin, M Ave, M Avenier, G Avila, T Bäcker, M Balzer, KB Barber, AF Barbosa, R Bardenet, SLC Barroso, B Baughman, J Bäuml, JJ Beatty, BR Becker, KH Becker, A Bellétoile, JA Bellido, S Benzvi, C Berat, X Bertou, PL Biermann, P Billoir, F Blanco, M Blanco, C Bleve, H Blümer, M Boháčová, D Boncioli, C Bonifazi, R Bonino, N Borodai, J Brack, P Brogueira, WC Brown, R Bruijn, P Buchholz, A Bueno, RE Burton, KS Caballero-Mora, L Caramete, R Caruso, A Castellina, O Catalano, G Cataldi, L Cazon, R Cester, J Chauvin, SH Cheng, A Chiavassa, JA Chinellato, A Chou, J Chudoba, RW Clay, MR Coluccia, R Conceição, F Contreras, H Cook, MJ Cooper, J Coppens, A Cordier, S Coutu, CE Covault, A Creusot, A Criss, J Cronin, A Curutiu, S Dagoret-Campagne, R Dallier, S Dasso, K Daumiller, BR Dawson, RM De Almeida, M De Domenico, C De Donato, SJ De Jong, G De La Vega, WJM De Mello Junior, JRT De Mello Neto, I De Mitri

Abstract:

The Surface Detector of the Pierre Auger Observatory is sensitive to neutrinos of all flavors above 0.1 EeV. These interact through charged and neutral currents in the atmosphere giving rise to extensive air showers. When interacting deeply in the atmosphere at nearly horizontal incidence, neutrinos can be distinguished from regular hadronic cosmic rays by the broad time structure of their shower signals in the water-Cherenkov detectors. In this paper we present for the first time an analysis based on down-going neutrinos. We describe the search procedure, the possible sources of background, the method to compute the exposure and the associated systematic uncertainties. No candidate neutrinos have been found in data collected from 1 January 2004 to 31 May 2010. Assuming an E-2 differential energy spectrum the limit on the single-flavor neutrino is E2dN/dE<1.74×10-7GeVcm -2s-1sr-1 at 90% C.L. in the energy range 1×1017eV

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Multi-year search for dark matter annihilations in the Sun with the AMANDA-II and IceCube detectors

ArXiv 1112.184 (2011)

Authors:

IceCube Collaboration, R Abbasi, Y Abdou, T Abu-Zayyad, M Ackermann, J Adams, JA Aguilar, M Ahlers, D Altmann, K Andeen, J Auffenberg, X Bai, M Baker, SW Barwick, R Bay, JL Bazo Alba, K Beattie, JJ Beatty, S Bechet, JK Becker, K-H Becker, M Bell, ML Benabderrahmane, S BenZvi, J Berdermann, P Berghaus, D Berley, E Bernardini, D Bertrand, DZ Besson, D Bindig, M Bissok, E Blaufuss, J Blumenthal, DJ Boersma, C Bohm, D Bose, S Böser, O Botner, L Brayeur, AM Brown, S Buitink, KS Caballero-Mora, M Carson, M Casier, D Chirkin, B Christy, F Clevermann, S Cohen, C Colnard, DF Cowen, AH Cruz Silva, MV D'Agostino, M Danninger, J Daughhetee, JC Davis, C De Clercq, T Degner, F Descamps, P Desiati, G de Vries-Uiterweerd, T DeYoung, JC Díaz-Vélez, M Dierckxsens, J Dreyer, JP Dumm, M Dunkman, J Eisch, RW Ellsworth, O Engdegård, S Euler, PA Evenson, O Fadiran, AR Fazely, A Fedynitch, J Feintzeig, T Feusels, K Filimonov, C Finley, T Fischer-Wasels, S Flis, A Franckowiak, R Franke, TK Gaisser, J Gallagher, L Gerhardt, L Gladstone, T Glüsenkamp, A Goldschmidt, JA Goodman, D Góra, D Grant, T Griesel, A Groß, S Grullon, M Gurtner, C Ha, A Haj Ismail, A Hallgren, F Halzen, K Han, K Hanson, D Heereman, D Heinen, K Helbing, R Hellauer, S Hickford, GC Hill, KD Hoffman, B Hoffmann, A Homeier, K Hoshina, W Huelsnitz, J-P Hülß, PO Hulth, K Hultqvist, S Hussain, A Ishihara, E Jacobi, J Jacobsen, GS Japaridze, H Johansson, A Kappes, T Karg, A Karle, J Kiryluk, F Kislat, SR Klein, J-H Köhne, G Kohnen, H Kolanoski, L Köpke, S Kopper, DJ Koskinen, M Kowalski, T Kowarik, M Krasberg, G Kroll, J Kunnen, N Kurahashi, T Kuwabara, M Labare, K Laihem, H Landsman, MJ Larson, R Lauer, J Lünemann, J Madsen, A Marotta, R Maruyama, K Mase, HS Matis, K Meagher, M Merck, P Mészáros, T Meures, S Miarecki, E Middell, N Milke, J Miller, T Montaruli, R Morse, SM Movit, R Nahnhauer, JW Nam, U Naumann, SC Nowicki, DR Nygren, S Odrowski, A Olivas, M Olivo, A O'Murchadha, S Panknin, L Paul, C Pérez de los Heros, A Piegsa, D Pieloth, J Posselt, PB Price, GT Przybylski, K Rawlins, P Redl, E Resconi, W Rhode, M Ribordy, M Richman, A Rizzo, JP Rodrigues, F Rothmaier, C Rott, T Ruhe, D Rutledge, B Ruzybayev, D Ryckbosch, H-G Sander, M Santander, S Sarkar, K Schatto, T Schmidt, S Schöneberg, A Schönwald, A Schukraft, L Schulte, A Schultes, O Schulz, M Schunck, D Seckel, B Semburg, SH Seo, Y Sestayo, S Seunarine, A Silvestri, GM Spiczak, C Spiering, M Stamatikos, T Stanev, T Stezelberger, RG Stokstad, A Stößl, EA Strahler, R Ström, M Stüer, GW Sullivan, H Taavola, I Taboada, A Tamburro, S Ter-Antonyan, S Tilav, PA Toale, S Toscano, D Tosi, N van Eijndhoven, A Van Overloop, J van Santen, M Vehring1, M Voge, C Walck, T Waldenmaier, M Wallraff, M Walter, R Wasserman, Ch Weaver, C Wendt, S Westerhoff, N Whitehorn, K Wiebe, CH Wiebusch, DR Williams, R Wischnewski, H Wissing, M Wolf, TR Wood, K Woschnagg, C Xu, DL Xu, XW Xu, JP Yanez, G Yodh, S Yoshida, P Zarzhitsky, M Zoll

Abstract:

A search for an excess of muon-neutrinos from dark matter annihilations in the Sun has been performed with the AMANDA-II neutrino telescope using data collected in 812 days of livetime between 2001 and 2006 and 149 days of livetime collected with the AMANDA-II and the 40-string configuration of IceCube during 2008 and early 2009. No excess over the expected atmospheric neutrino background has been observed. We combine these results with the previously published IceCube limits obtained with data taken during 2007 to obtain a total livetime of 1065 days. We provide an upper limit at 90% confidence level on the annihilation rate of captured neutralinos in the Sun, as well as the corresponding muon flux limit at the Earth, both as functions of the neutralino mass in the range 50 GeV-5000 GeV. We also derive a limit on the neutralino-proton spin-dependent and spin-independent cross section. The limits presented here improve the previous results obtained by the collaboration between a factor of two and five, as well as extending the neutralino masses probed down to 50 GeV. The spin-dependent cross section limits are the most stringent so far for neutralino masses above 200 GeV, and well below direct search results in the mass range from 50 GeV to 5 TeV.

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Searching for soft relativistic jets in Core-collapse Supernovae with the IceCube Optical Follow-up Program

ArXiv 1111.703 (2011)

Authors:

The IceCube Collaboration, R Abbasi, Y Abdou, T Abu-Zayyad, M Ackermann, J Adams, JA Aguilar, M Ahlers, MM Allen, D Altmann, K Andeen, J Auffenberg, X Bai, M Baker, SW Barwick, R Bay, JL Bazo Alba, K Beattie, JJ Beatty, S Bechet, JK Becker, K-H Becker, ML Benabderrahmane, S BenZvi, J Berdermann, P Berghaus, D Berley, E Bernardini, D Bertrand, DZ Besson, D Bindig, M Bissok, E Blaufuss, J Blumenthal, DJ Boersma, C Bohm, D Bose, S Böser, O Botner, AM Brown, S Buitink, KS Caballero-Mora, M Carson, D Chirkin, B Christy, F Clevermann, S Cohen, C Colnard, DF Cowen, AH Cruz Silva, MV D'Agostino, M Danninger, J Daughhetee, JC Davis, C De Clercq, T Degner, L Demirörs, F Descamps, P Desiati, G de Vries-Uiterweerd, T DeYoung, JC Díaz-Vélez, M Dierckxsens, J Dreyer, JP Dumm, M Dunkman, J Eisch, RW Ellsworth, O Engdegård, S Euler, PA Evenson, O Fadiran, AR Fazely, A Fedynitch, J Feintzeig, T Feusels, K Filimonov, C Finley, T Fischer-Wasels, BD Fox, A Franckowiak, R Franke, TK Gaisser, J Gallagher, L Gerhardt, L Gladstone, T Glüsenkamp, A Goldschmidt, JA Goodman, D Góra, D Grant, T Griesel, A Groß, S Grullon, M Gurtner, C Ha, A Haj Ismail, A Hallgren, F Halzen, K Han, K Hanson, D Heinen, K Helbing, R Hellauer, P Herquet, S Hickford, GC Hill, KD Hoffman, B Hoffmann, A Homeier, K Hoshina, W Huelsnitz, J-P Hülß, PO Hulth, K Hultqvist, S Hussain, A Ishihara, E Jacobi, J Jacobsen, GS Japaridze, H Johansson, K-H Kampert, A Kappes, T Karg, A Karle, P Kenny, J Kiryluk, F Kislat, SR Klein, J-H Köhne, G Kohnen, H Kolanoski, L Köpke, S Kopper, DJ Koskinen, M Kowalski, T Kowarik, M Krasberg, G Kroll, N Kurahashi, T Kuwabara, M Labare, K Laihem, H Landsman, MJ Larson, R Lauer, J Lünemann, J Madsen, A Marotta, R Maruyama, K Mase, HS Matis, K Meagher, M Merck, P Mészáros, T Meures, S Miarecki, E Middell, N Milke, J Miller, T Montaruli, R Morse, SM Movit, R Nahnhauer, JW Nam, U Naumann, DR Nygren, S Odrowski, A Olivas, M Olivo, A O'Murchadha, S Panknin, L Paul, C Pérez de los Heros, J Petrovic, A Piegsa, D Pieloth, R Porrata, J Posselt, PB Price, GT Przybylski, K Rawlins, P Redl, E Resconi, W Rhode, M Ribordy, M Richman, JP Rodrigues, F Rothmaier, C Rott, T Ruhe, D Rutledge, B Ruzybayev, D Ryckbosch, H-G Sander, M Santander, S Sarkar, K Schatto, T Schmidt, A Schönwald, A Schukraft, A Schultes, O Schulz, M Schunck, D Seckel, B Semburg, SH Seo, Y Sestayo, S Seunarine, A Silvestri, GM Spiczak, C Spiering, M Stamatikos, T Stanev, T Stezelberger, RG Stokstad, A Stössl, EA Strahler, R Ström, M Stüer, GW Sullivan, Q Swillens, H Taavola, I Taboada, A Tamburro, S Ter-Antonyan, S Tilav, PA Toale, S Toscano, D Tosi, N van Eijndhoven, J Vandenbroucke, A Van Overloop, J van Santen, M Vehring, M Voge, C Walck, T Waldenmaier, M Wallraff, M Walter, Ch Weaver, C Wendt, S Westerhoff, N Whitehorn, K Wiebe, CH Wiebusch, DR Williams, R Wischnewski, H Wissing, M Wolf, TR Wood, K Woschnagg, C Xu, DL Xu, XW Xu, JP Yanez, G Yodh, S Yoshida, P Zarzhitsky, M Zoll The ROTSE Collaboration, CW Akerlof, SB Pandey, F Yuan, W Zheng

Abstract:

Context. Transient neutrino sources such as Gamma-Ray Bursts (GRBs) and Supernovae (SNe) are hypothesized to emit bursts of high-energy neutrinos on a time-scale of \lesssim 100 s. While GRB neutrinos would be produced in high relativistic jets, core-collapse SNe might host soft-relativistic jets, which become stalled in the outer layers of the progenitor star leading to an efficient production of high-energy neutrinos. Aims. To increase the sensitivity to these neutrinos and identify their sources, a low-threshold optical follow-up program for neutrino multiplets detected with the IceCube observatory has been implemented. Methods. If a neutrino multiplet, i.e. two or more neutrinos from the same direction within 100 s, is found by IceCube a trigger is sent to the Robotic Optical Transient Search Experiment, ROTSE. The 4 ROTSE telescopes immediately start an observation program of the corresponding region of the sky in order to detect an optical counterpart to the neutrino events. Results. No statistically significant excess in the rate of neutrino multiplets has been observed and furthermore no coincidence with an optical counterpart was found. Conclusion. The search allows, for the first time, to set stringent limits on current models predicting a high-energy neutrino flux from soft relativistic hadronic jets in core-collapse SNe. We conclude that a sub-population of SNe with typical Lorentz boost factor and jet energy of 10 and 3\times10^{51} erg, respectively, does not exceed 4.2% at 90% confidence.

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Prof Subir Sarkar

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IceCube

IceCube at Oxford

REVIEW OF PARTICLE PHYSICS Particle Data Group

Authors:

Second-order Fermi acceleration as the origin of the Fermi bubbles

Authors:

Search for ultrahigh energy neutrinos in highly inclined events at the Pierre Auger Observatory

Authors:

Abstract:

Multi-year search for dark matter annihilations in the Sun with the AMANDA-II and IceCube detectors

Authors:

Abstract:

Searching for soft relativistic jets in Core-collapse Supernovae with the IceCube Optical Follow-up Program

Authors:

Abstract:

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Prof Subir Sarkar

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IceCube

IceCube at Oxford

REVIEW OF PARTICLE PHYSICS Particle Data Group

Authors:

Second-order Fermi acceleration as the origin of the Fermi bubbles

Authors:

Search for ultrahigh energy neutrinos in highly inclined events at the Pierre Auger Observatory

Authors:

Abstract:

Multi-year search for dark matter annihilations in the Sun with the AMANDA-II and IceCube detectors

Authors:

Abstract:

Searching for soft relativistic jets in Core-collapse Supernovae with the IceCube Optical Follow-up Program

Authors:

Abstract: