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The LOFAR radio environment

(2012)

Authors:

AR Offringa, AG de Bruyn, S Zaroubi, G van Diepen, O Martinez-Ruby, P Labropoulos, MA Brentjens, B Ciardi, S Daiboo, G Harker, V Jelic, S Kazemi, LVE Koopmans, G Mellema, VN Pandey, RF Pizzo, J Schaye, H Vedantham, V Veligatla, SJ Wijnholds, S Yatawatta, P Zarka, A Alexov, J Anderson, A Asgekar, M Avruch, R Beck, M Bell, MR Bell, M Bentum, G Bernardi, P Best, L Birzan, A Bonafede, F Breitling, JW Broderick, M Bruggen, H Butcher, J Conway, M de Vos, RJ Dettmar, J Eisloeffel, H Falcke, R Fender, W Frieswijk, M Gerbers, JM Griessmeier, AW Gunst, TE Hassall, G Heald, J Hessels, M Hoeft, A Horneffer, A Karastergiou, V Kondratiev, Y Koopman, M Kuniyoshi, G Kuper, P Maat, G Mann, J McKean, H Meulman, M Mevius, JD Mol, R Nijboer, J Noordam, M Norden, H Paas, M Pandey, R Pizzo, A Polatidis, D Rafferty, S Rawlings, W Reich, HJA Rottgering, AP Schoenmakers, J Sluman, O Smirnov, C Sobey, B Stappers, M Steinmetz, J Swinbank, M Tagger, Y Tang, C Tasse, A van Ardenne, W van Cappellen, AP van Duin, M van Haarlem, J van Leeuwen, RJ van Weeren, R Vermeulen, C Vocks, RAMJ Wijers, M Wise, O Wucknitz
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The Large Observatory for X-ray Timing (LOFT)

Experimental Astronomy 34:2 (2012) 415-444

Authors:

M Feroci, L Stella, M van der Klis, TJL Courvoisier, M Hernanz, R Hudec, A Santangelo, D Walton, A Zdziarski, D Barret, T Belloni, J Braga, S Brandt, C Budtz-Jørgensen, S Campana, JW den Herder, J Huovelin, GL Israel, M Pohl, P Ray, A Vacchi, S Zane, A Argan, P Attinà, G Bertuccio, E Bozzo, R Campana, D Chakrabarty, E Costa, A de Rosa, E Del Monte, S Di Cosimo, I Donnarumma, Y Evangelista, D Haas, P Jonker, S Korpela, C Labanti, P Malcovati, R Mignani, F Muleri, M Rapisarda, A Rashevsky, N Rea, A Rubini, C Tenzer, C Wilson-Hodge, B Winter, K Wood, G Zampa, N Zampa, MA Abramowicz, MA Alpar, D Altamirano, JM Alvarez, L Amati, C Amoros, LA Antonelli, R Artigue, P Azzarello, M Bachetti, G Baldazzi, M Barbera, C Barbieri, S Basa, A Baykal, R Belmont, L Boirin, V Bonvicini, L Burderi, M Bursa, C Cabanac, E Cackett, GA Caliandro, P Casella, S Chaty, J Chenevez, MJ Coe, A Collura, A Corongiu, S Covino, G Cusumano, F D'Amico, S Dall'Osso, D de Martino, G de Paris, G Di Persio, T Di Salvo, C Done, M Dovčiak, A Drago, U Ertan, S Fabiani, M Falanga, R Fender, P Ferrando, D della Monica Ferreira, G Fraser, F Frontera, F Fuschino

Abstract:

High-time-resolution X-ray observations of compact objects provide direct access to strong-field gravity, to the equation of state of ultradense matter and to black hole masses and spins. A 10 m 2-class instrument in combination with good spectral resolution is required to exploit the relevant diagnostics and answer two of the fundamental questions of the European Space Agency (ESA) Cosmic Vision Theme "Matter under extreme conditions", namely: does matter orbiting close to the event horizon follow the predictions of general relativity? What is the equation of state of matter in neutron stars? The Large Observatory For X-ray Timing (LOFT), selected by ESA as one of the four Cosmic Vision M3 candidate missions to undergo an assessment phase, will revolutionise the study of collapsed objects in our galaxy and of the brightest supermassive black holes in active galactic nuclei. Thanks to an innovative design and the development of large-area monolithic silicon drift detectors, the Large Area Detector (LAD) on board LOFT will achieve an effective area of ~12 m 2 (more than an order of magnitude larger than any spaceborne predecessor) in the 2-30 keV range (up to 50 keV in expanded mode), yet still fits a conventional platform and small/medium-class launcher. With this large area and a spectral resolution of <260 eV, LOFT will yield unprecedented information on strongly curved spacetimes and matter under extreme conditions of pressure and magnetic field strength. © 2011 Springer Science+Business Media B.V.
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The progenitor mass of the Type IIP supernova SN 2004et from late-time spectral modeling⋆

Astronomy & Astrophysics EDP Sciences 546 (2012) a28

Authors:

A Jerkstrand, C Fransson, K Maguire, S Smartt, M Ergon, J Spyromilio
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Search for pair production of first- and second-generation scalar leptoquarks in pp collisions at √s=7TeV

Physical Review D - Particles, Fields, Gravitation and Cosmology 86:5 (2012)

Authors:

S Chatrchyan, V Khachatryan, AM Sirunyan, A Tumasyan, W Adam, E Aguilo, T Bergauer, M Dragicevic, J Erö, C Fabjan, M Friedl, R Frühwirth, VM Ghete, J Hammer, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, V Knünz, M Krammer, I Krätschmer, D Liko, I Mikulec, M Pernicka, B Rahbaran, C Rohringer, H Rohringer, R Schöfbeck, J Strauss, A Taurok, W Waltenberger, G Walzel, E Widl, CE Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, M Bansal, S Bansal, T Cornelis, EA De Wolf, X Janssen, S Luyckx, L Mucibello, S Ochesanu, B Roland, R Rougny, M Selvaggi, Z Staykova, H Van Haevermaet, P Van Mechelen, N Van Remortel, A Van Spilbeeck, F Blekman, S Blyweert, J D'Hondt, R Gonzalez Suarez, A Kalogeropoulos, M Maes, A Olbrechts, W Van Doninck, P Van Mulders, GP Van Onsem, I Villella, B Clerbaux, G De Lentdecker, V Dero, APR Gay, T Hreus, A Léonard, PE Marage, T Reis, L Thomas, G Vander Marcken, C Vander Velde, P Vanlaer, J Wang, V Adler, K Beernaert, A Cimmino, S Costantini, G Garcia, M Grunewald, B Klein, J Lellouch, A Marinov, J McCartin, AA Ocampo Rios, D Ryckbosch, N Strobbe, F Thyssen, M Tytgat, P Verwilligen, S Walsh, E Yazgan, N Zaganidis, S Basegmez, G Bruno, R Castello, L Ceard

Abstract:

Results are presented from a search for the pair production of first- and second-generation scalar leptoquarks in proton-proton collisions at √s=7TeV. The data sample corresponds to an integrated luminosity of 5.0fb-1, collected by the CMS detector at the LHC. The search signatures involve either two charged leptons of the same flavor (electrons or muons) and at least two jets or a single charged lepton (electron or muon), missing transverse energy, and at least two jets. If the branching fraction of the leptoquark decay into a charged lepton and a quark is assumed to be β=1, leptoquark pair production is excluded at the 95% confidence level for masses below 830 GeV and 840 GeV for the first and second generations, respectively. For β=0.5, masses below 640 GeV and 650 GeV are excluded. These limits are the most stringent to date. © 2012 CERN.
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Transverse momentum cross section of e +e - pairs in the Z-boson region from pp̄ collisions at √s=1.96TeV

Physical Review D - Particles, Fields, Gravitation and Cosmology 86:5 (2012)

Authors:

T Aaltonen, B Alvarez González, S Amerio, D Amidei, A Anastassov, A Annovi, J Antos, G Apollinari, JA Appel, T Arisawa, A Artikov, J Asaadi, W Ashmanskas, B Auerbach, A Aurisano, F Azfar, W Badgett, T Bae, A Barbaro-Galtieri, VE Barnes, BA Barnett, P Barria, P Bartos, M Bauce, F Bedeschi, S Behari, G Bellettini, J Bellinger, D Benjamin, A Beretvas, A Bhatti, D Bisello, I Bizjak, KR Bland, B Blumenfeld, A Bocci, A Bodek, D Bortoletto, J Boudreau, A Boveia, L Brigliadori, C Bromberg, E Brucken, J Budagov, HS Budd, K Burkett, G Busetto, P Bussey, A Buzatu, A Calamba, C Calancha, S Camarda, M Campanelli, M Campbell, F Canelli, B Carls, D Carlsmith, R Carosi, S Carrillo, S Carron, B Casal, M Casarsa, A Castro, P Catastini, D Cauz, V Cavaliere, M Cavalli-Sforza, A Cerri, L Cerrito, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, K Cho, D Chokheli, WH Chung, YS Chung, MA Ciocci, A Clark, C Clarke, G Compostella, ME Convery, J Conway, M Corbo, M Cordelli, CA Cox, DJ Cox, F Crescioli, J Cuevas, R Culbertson, D Dagenhart, N D'ascenzo, M Datta, P De Barbaro, M Dell'orso, L Demortier, M Deninno, F Devoto, M D'errico

Abstract:

The transverse momentum cross section of e +e - pairs in the Z-boson mass region of 66-116GeV/c2 is precisely measured using Run II data corresponding to 2.1fb -1 of integrated luminosity recorded by the Collider Detector at Fermilab. The cross section is compared with two quantum chromodynamic calculations. One is a fixed-order perturbative calculation at O(αs2), and the other combines perturbative predictions at high transverse momentum with the gluon resummation formalism at low transverse momentum. Comparisons of the measurement with calculations show reasonable agreement. The measurement is of sufficient precision to allow refinements in the understanding of the transverse momentum distribution. © 2012 American Physical Society.
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