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Your search keyword '"McCollough, M."' showing total 7 results
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7 results on '"McCollough, M."'

1. The hypersoft state of Cygnus X–3

Author

Koljonen, K. I. I., primary, Maccarone, T., additional, McCollough, M. L., additional, Gurwell, M., additional, Trushkin, S. A., additional, Pooley, G. G., additional, Piano, G., additional, and Tavani, M., additional

Published
2018
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2. First INTEGRAL observations of Cygnus X-3

Author

Vilhu, O., Hjalmarsdotter, L., Zdziarski, A. A., Paizis, A., McCollough, M. L., Beckmann, V., Courvoisier, T. J.-L., Goldoni, P., Hakala, P., Hannikainen, D., Kretschmar, P., Westergaard, N. J., and Ebisawa, Ken

Subjects
Physics, Astrophysics (astro-ph), Phase (waves), FOS: Physical sciences, Broad band, Binary number, Astronomy and Astrophysics, Astrophysics, Light curve, Spectral line, X.3, Space and Planetary Science, Reflection (physics)
Abstract

著者人数：13名, Accepted: 2003-08-18, 資料番号: SA1002406000

Published
2003

3. The AGILE monitoring of Cygnus X-3: transient gamma-ray emission and spectral constraints

Author

Piano, G., primary, Tavani, M., additional, Vittorini, V., additional, Trois, A., additional, Giuliani, A., additional, Bulgarelli, A., additional, Evangelista, Y., additional, Coppi, P., additional, Del Monte, E., additional, Sabatini, S., additional, Striani, E., additional, Donnarumma, I., additional, Hannikainen, D., additional, Koljonen, K. I. I., additional, McCollough, M., additional, Pooley, G., additional, Trushkin, S., additional, Zanin, R., additional, Barbiellini, G., additional, Cardillo, M., additional, Cattaneo, P. W., additional, Chen, A. W., additional, Colafrancesco, S., additional, Feroci, M., additional, Fuschino, F., additional, Giusti, M., additional, Longo, F., additional, Morselli, A., additional, Pellizzoni, A., additional, Pittori, C., additional, Pucella, G., additional, Rapisarda, M., additional, Rappoldi, A., additional, Soffitta, P., additional, Trifoglio, M., additional, Vercellone, S., additional, and Verrecchia, F., additional

Published
2012
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4. AGILE detection of Cygnus X-3γ-ray active states during the period mid-2009/mid-2010

Author

Bulgarelli, A., primary, Tavani, M., additional, Chen, A. W., additional, Evangelista, Y., additional, Trifoglio, M., additional, Gianotti, F., additional, Piano, G., additional, Sabatini, S., additional, Striani, E., additional, Pooley, G., additional, Trushkin, S., additional, Nizhelskij, N. A., additional, McCollough, M., additional, Koljonen, K. I. I., additional, Hannikainen, D., additional, Lähteenmäki, A., additional, Tammi, J., additional, Lavonen, N., additional, Steeghs, D., additional, Aboudan, A., additional, Argan, A., additional, Barbiellini, G., additional, Campana, R., additional, Caraveo, P., additional, Cattaneo, P. W., additional, Cocco, V., additional, Contessi, T., additional, Costa, E., additional, D’Ammando, F., additional, Del Monte, E., additional, De Paris, G., additional, Di Cocco, G., additional, Donnarumma, I., additional, Feroci, M., additional, Fiorini, M., additional, Fuschino, F., additional, Galli, M., additional, Giuliani, A., additional, Giusti, M., additional, Labanti, C., additional, Lapshov, I., additional, Lazzarotto, F., additional, Lipari, P., additional, Longo, F., additional, Marisaldi, M., additional, Mereghetti, S., additional, Morelli, E., additional, Moretti, E., additional, Morselli, A., additional, Pacciani, L., additional, Pellizzoni, A., additional, Perotti, F., additional, Picozza, P., additional, Pilia, M., additional, Prest, M., additional, Pucella, G., additional, Rapisarda, M., additional, Rappoldi, A., additional, Rubini, A., additional, Soffitta, P., additional, Trois, A., additional, Vallazza, E., additional, Vercellone, S., additional, Vittorini, V., additional, Zambra, A., additional, Zanello, D., additional, Giommi, P., additional, Pittori, C., additional, Verrecchia, F., additional, Santolamazza, P., additional, Lucarelli, F., additional, Colafrancesco, S., additional, and Salotti, L., additional

Published
2012
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6. INTEGRAL and Swift observations of EXO 2030+375 during a giant outburst

Author

Klochkov, D., primary, Horns, D., additional, Santangelo, A., additional, Staubert, R., additional, Segreto, A., additional, Ferrigno, C., additional, Kretschmar, P., additional, Kreykenbohm, I., additional, La Barbera, A., additional, Masetti, N., additional, McCollough, M., additional, Pottschmidt, K., additional, Schönherr, G., additional, and Wilms, J., additional

Published
2007
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7. AGILE detection of Cygnus X-3 Υ-ray active states during the period mid-2009/mid-2010.

Author

Bulgarelli, A., Tavani, M., A. W. Chen, Evangelista, Y., Trifoglio, M., Gianotti, F., Piano, G., Sabatini, S., Striani, E., Pooley, G., Trushkin, S., Nizhelskij, N. A., McCollough, M., Koljonen, K. I. I., Hannikainen, D., Lähteenmäki, A., Tammi, J., Lavonen, N., Steeghs, D., and Aboudan, A.

Subjects
RADIO sources (Astronomy), X-ray binaries, BINARY stars, ASTROPHYSICS, RADIO astronomy
Abstract

Context. Cygnus X-3 (Cyg X-3) is a well-known microquasar producing variable emission at all wavelengths. Cyg X-3 is a prominent X-ray binary producing relativistic jets, and studying its high energy emission is crucial for the understanding of the fundamental acceleration processes in accreting compact objects. Aims. Our goal is to study extreme particle acceleration and Υ-ray production above 100 MeV during special spectral states of Cyg X-3 usually characterized by a low hard X-ray flux and enhanced soft X-ray states. Methods. We observed Cyg X-3 with the AGILE satellite in extended time intervals from 2009 Jun.-Jul., and 2009 Nov.-2010 Jul. We report here the results of the AGILE Υ-ray monitoring of Cyg X-3 as well as the results from extensive multiwavelength campaigns involving radio (RATAN-600, AMI-LA and Metsähovi Radio Observatories) and X-ray monitoring data (XTE and Swift). Results. We detect a series of repeated Υ-ray flaring activity from Cyg X-3 that correlate with the soft X-ray states and episodes of decreasing or non-detectable hard X-ray emission. Furthermore, we detect Υ-ray enhanced emission that tends to be associated with radio flares greater than 1 Jy at 15 GHz, confirming a trend already detected in previous observations. The source remained active above 100 MeV for an extended period of time (almost 1.5 months in 2009 Jun.-Jul. and 1 month in 2010 May). We study in detail the short timescale Υ-ray flares that occurred before or near the radio peaks. Conclusions. Our results confirm the transient nature of the extreme particle acceleration from the microquasar Cyg X-3. A series of repeated Υ-ray flares shows correlations with radio and X-ray emission confirming a well established trend of emission. We compare our results with Fermi-LAT and MAGIC TeV observations of Cyg X-3 [ABSTRACT FROM AUTHOR]

Published
2012
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