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Rosse Telescope

Garret Cotter

Professor of Physics

Research theme

  • Astronomy and astrophysics
  • Particle astrophysics & cosmology

Sub department

  • Astrophysics

Research groups

  • Pulsars, transients and relativistic astrophysics
  • The Square Kilometre Array (SKA)
  • Gamma-ray astronomy
Garret.Cotter@physics.ox.ac.uk
Telephone: 01865 (2)73604
Denys Wilkinson Building, room 705
  • About
  • Publications

Prospects for Cherenkov Telescope Array observations of the young supernova remnant RX J1713.7−3946

Astrophysical Journal American Astronomical Society 840:2 (2017) 74

Authors:

F Acero, R Aloisio, J Amans, G Cotter, A De Franco, Subir Sarkar, JJ Watson, Et Et al.

Abstract:

We perform simulations for future Cherenkov Telescope Array (CTA) observations of RX J1713.7−3946, a young supernova remnant (SNR) and one of the brightest sources ever discovered in very high energy (VHE) gamma rays. Special attention is paid to exploring possible spatial (anti)correlations of gamma rays with emission at other wavelengths, in particular X-rays and CO/H i emission. We present a series of simulated images of RX J1713.7−3946 for CTA based on a set of observationally motivated models for the gamma-ray emission. In these models, VHE gamma rays produced by high-energy electrons are assumed to trace the nonthermal X-ray emission observed by XMM-Newton, whereas those originating from relativistic protons delineate the local gas distributions. The local atomic and molecular gas distributions are deduced by the NANTEN team from CO and H i observations. Our primary goal is to show how one can distinguish the emission mechanism(s) of the gamma rays (i.e., hadronic versus leptonic, or a mixture of the two) through information provided by their spatial distribution, spectra, and time variation. This work is the first attempt to quantitatively evaluate the capabilities of CTA to achieve various proposed scientific goals by observing this important cosmic particle accelerator.
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Prospects for CTA observations of the young SNR RX J1713.7-3946

(2017)

Authors:

The CTA Consortium, :, F Acero, R Aloisio, J Amans, E Amato, LA Antonelli, C Aramo, T Armstrong, F Arqueros, K Asano, M Ashley, M Backes, C Balazs, A Balzer, A Bamba, M Barkov, JA Barrio, W Benbow, K Bernlöhr, V Beshley, C Bigongiari, A Biland, A Bilinsky, E Bissaldi, J Biteau, O Blanch, P Blasi, J Blazek, C Boisson, G Bonanno, A Bonardi, C Bonavolontà, G Bonnoli, C Braiding, S Brau-Nogué, J Bregeon, AM Brown, V Bugaev, A Bulgarelli, T Bulik, M Burton, A Burtovoi, G Busetto, M Böttcher, R Cameron, M Capalbi, A Caproni, P Caraveo, R Carosi, E Cascone, M Cerruti, S Chaty, A Chen, X Chen, M Chernyakova, M Chikawa, J Chudoba, J Cohen-Tanugi, S Colafrancesco, V Conforti, JL Contreras, A Costa, G Cotter, S Covino, G Covone, P Cumani, G Cusumano, F D'Ammando, D D'Urso, M Daniel, F Dazzi, A De Angelis, G De Cesare, A De Franco, F De Frondat, EM de Gouveia Dal Pino, C De Lisio, R de los Reyes Lopez, B De Lotto, M de Naurois, F De Palma, M Del Santo, C Delgado, D della Volpe, T Di Girolamo, C Di Giulio, F Di Pierro, L Di Venere, M Doro, J Dournaux, D Dumas, V Dwarkadas, C Díaz, J Ebr, K Egberts, S Einecke, D Elsässer, S Eschbach, D Falceta-Goncalves, G Fasola, E Fedorova, A Fernández-Barral, G Ferrand, M Fesquet, E Fiandrini, A Fiasson, MD Filipovíc, V Fioretti, L Font, G Fontaine, FJ Franco, L Freixas Coromina, Y Fujita, Y Fukui, S Funk, A Förster, A Gadola, R Garcia López, M Garczarczyk, N Giglietto, F Giordano, A Giuliani, J Glicenstein, R Gnatyk, P Goldoni, T Grabarczyk, R Graciani, J Graham, P Grandi, J Granot, AJ Green, S Griffiths, S Gunji, H Hakobyan, S Hara, T Hassan, M Hayashida, M Heller, JC Helo, J Hinton, B Hnatyk, J Huet, M Huetten, TB Humensky, M Hussein, J Hörandel, Y Ikeno, T Inada, Y Inome, S Inoue, T Inoue, Y Inoue, K Ioka, M Iori, J Jacquemier, P Janecek, D Jankowsky, I Jung, P Kaaret, H Katagiri, S Kimeswenger, S Kimura, J Knödlseder, B Koch, J Kocot, K Kohri, N Komin, Y Konno, K Kosack, S Koyama, M Kraus, H Kubo, G Kukec Mezek, J Kushida, N La Palombara, K Lalik, G Lamanna, H Landt, J Lapington, P Laporte, S Lee, J Lees, J Lefaucheur, J-P Lenain, G Leto, E Lindfors, T Lohse, S Lombardi, F Longo, M Lopez, F Lucarelli, PL Luque-Escamilla, R López-Coto, MC Maccarone, G Maier, G Malaguti, D Mandat, G Maneva, S Mangano, A Marcowith, J Martí, M Martínez, G Martínez, S Masuda, G Maurin, N Maxted, C Melioli, T Mineo, N Mirabal, T Mizuno, R Moderski, M Mohammed, T Montaruli, A Moralejo, K Mori, G Morlino, A Morselli, E Moulin, R Mukherjee, C Mundell, H Muraishi, K Murase, S Nagataki, T Nagayoshi, T Naito, D Nakajima, T Nakamori, R Nemmen, J Niemiec, D Nieto, M Nievas-Rosillo, M Nikołajuk, K Nishijima, K Noda, L Nogues, D Nosek, B Novosyadlyj, S Nozaki, Y Ohira, M Ohishi, S Ohm, A Okumura, RA Ong, R Orito, A Orlati, M Ostrowski, I Oya, M Padovani, J Palacio, M Palatka, JM Paredes, S Pavy, A Pe'er, M Persic, P Petrucci, O Petruk, A Pisarski, M Pohl, A Porcelli, E Prandini, J Prast, G Principe, M Prouza, E Pueschel, G Pühlhofer, A Quirrenbach, M Rameez, O Reimer, M Renaud, M Ribó, J Rico, V Rizi, J Rodriguez, G Rodriguez Fernandez, JJ Rodríguez Vázquez, P Romano, G Romeo, J Rosado, J Rousselle, G Rowell, B Rudak, I Sadeh, S Safi-Harb, T Saito, N Sakaki, D Sanchez, P Sangiorgi, H Sano, M Santander, S Sarkar, M Sawada, EJ Schioppa, H Schoorlemmer, P Schovanek, F Schussler, O Sergijenko, M Servillat, A Shalchi, RC Shellard, H Siejkowski, A Sillanpää, D Simone, V Sliusar, H Sol, S Stanič, R Starling, Ł Stawarz, S Stefanik, M Stephan, T Stolarczyk, M Szanecki, T Szepieniec, G Tagliaferri, H Tajima, M Takahashi, J Takeda, M Tanaka, S Tanaka, LA Tejedor, I Telezhinsky, P Temnikov, Y Terada, D Tescaro, M Teshima, V Testa, S Thoudam, F Tokanai, DF Torres, E Torresi, G Tosti, C Townsley, P Travnicek, C Trichard, M Trifoglio, S Tsujimoto, V Vagelli, P Vallania, L Valore, W van Driel, C van Eldik, J Vandenbroucke, V Vassiliev, M Vecchi, S Vercellone, S Vergani, C Vigorito, S Vorobiov, M Vrastil, ML Vázquez Acosta, SJ Wagner, R Wagner, SP Wakely, R Walter, JE Ward, JJ Watson, A Weinstein, M White, R White, A Wierzcholska, P Wilcox, DA Williams, R Wischnewski, P Wojcik, T Yamamoto, H Yamamoto, R Yamazaki, S Yanagita, L Yang, T Yoshida, M Yoshida, S Yoshiike, T Yoshikoshi, M Zacharias, L Zampieri, R Zanin, M Zavrtanik, D Zavrtanik, A Zdziarski, A Zech, H Zechlin, V Zhdanov, A Ziegler, J Zorn
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IC 630: Piercing the Veil of the Nuclear Gas

The Astrophysical Journal 838:2 (2017) 102-102

Authors:

M Durré, J Mould, M Schartmann, SA Uddin, G Cotter
More details from the publisher
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Redshift measurement of Fermi blazars for the Cherenkov telescope array

AIP Conference Proceedings AIP Publishing 1792:1 (2017) 050025

Authors:

Santiago Pita, Paolo Goldoni, Catherine Boisson, Garret Cotter, Julien Lefaucheur, Jean-Philippe Lenain, Elina Lindfors, David A Williams
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Inauguration and first light of the GCT-M prototype for the Cherenkov Telescope Array

6th International Symposium on High-Energy Gamma-Ray Astronomy (Gamma2016), Institute of Physics (2017)

Authors:

Jason J Watson, Andrea De Franco, A Abchiche, D Allan, J-P Amans, TP Armstrong, A Balzer, D Berge, C Boisson, J-J Bousquet, AM Brown, M Bryan, G Buchholtz, PM Chadwick, H Costantini, Garret Cotter, MK Daniel, F De Frondat, J-L Dournaux, D Dumas, J-P Ernenwein, G Fasola, S Funk, J Gironnet, JA Graham, T Greenshaw, O Hervet, N Hidaka, JA Hinton, J-M Huet, I Jegouzo, T Jogler, M Kraus, JS Lapington, P Laporte, J Lefaucheur, S Markoff, T Melse, L Mohrmann, P Molyneux, SJ Nolan, A Okumura, JP Osborne, RD Parsons, S Rosen, D Ross, G Rowell, CB Rulten, Y Sato, F Sayede

Abstract:

The Gamma-ray Cherenkov Telescope (GCT) is a candidate for the Small Size Telescopes (SSTs) of the Cherenkov Telescope Array (CTA). Its purpose is to extend the sensitivity of CTA to gamma-ray energies reaching 300 TeV. Its dual-mirror optical design and curved focal plane enables the use of a compact camera of 0.4 m diameter, while achieving a field of view of above 8 degrees. Through the use of the digitising TARGET ASICs, the Cherenkov flash is sampled once per nanosecond contin-uously and then digitised when triggering conditions are met within the analogue outputs of the photosensors. Entire waveforms (typically covering 96 ns) for all 2048 pixels are then stored for analysis, allowing for a broad spectrum of investigations to be performed on the data. Two prototypes of the GCT camera are under development, with differing photosensors: Multi-Anode Photomultipliers (MAPMs) and Silicon Photomultipliers (SiPMs). During November 2015, the GCT MAPM (GCT-M) prototype camera was integrated onto the GCT structure at the Observatoire de Paris-Meudon, where it observed the first Cherenkov light detected by a prototype instrument for CTA.
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