Zobrazeno 1 - 10
of 294
pro vyhledávání: '"Pooley, Guy"'
Thanks to recurrent observations of the black hole binary Cyg X-1 carried out over 15 years the INTEGRAL satellite has collected the largest data set in the hard X-ray band for this source. We have analyzed these data, complemented by data collected
Externí odkaz:
http://arxiv.org/abs/2006.02154
We study long-term radio/X-ray correlations in Cyg X-1. We find the persistent existence of a compact radio jet in its soft state. This represents a new phenomenon in black-hole binaries, in addition to compact jets in the hard state and episodic eje
Externí odkaz:
http://arxiv.org/abs/2002.12152
Autor:
Zdziarski, Andrzej A., Malyshev, Denys, Dubus, Guillaume, Pooley, Guy G., Johnson, Tyrel, Frankowski, Adam, de Marco, Barbara, Chernyakova, Maria, Rao, A. R.
We study high-energy $\gamma$-rays observed from Cyg X-3 by the Fermi Large Area Telescope and the 15-GHz emission observed by the Ryle Telescope and the Arcminute Microkelvin Imager. We measure the $\gamma$-ray spectrum averaged over strong flares m
Externí odkaz:
http://arxiv.org/abs/1804.07460
Autor:
Perrott, Yvette C., Cantwell, Therese M., Carey, Steve H., Elwood, Patrick J., Feroz, Farhan, Grainge, Keith J. B., Green, David A., Hobson, Michael P., Javid, Kamran, Jin, Terry Z., Pooley, Guy G., Razavi-Ghods, Nima, Rumsey, Clare, Saunders, Richard D. E., Scaife, Anna M. M., Schammel, Michel P., Scott, Paul F., Shimwell, Timothy W., Titterington, David J., Waldram, Elizabeth M.
The Arcminute Microkelvin Imager (AMI) carried out a blind survey for galaxy clusters via their Sunyaev-Zel'dovich effect decrements between 2008 and 2011. The first detection, known as AMI-CL J0300+2613, has been reobserved with AMI equipped with a
Externí odkaz:
http://arxiv.org/abs/1709.05136
Autor:
Hickish, Jack, Razavi-Ghods, Nima, Perrott, Yvette C., Titterington, David J., Carey, Steve H., Scott, Paul F., Grainge, Keith J. B., Scaife, Anna M. M., Alexander, Paul, Saunders, Richard D. E., Crofts, Mike, Javid, Kamran, Rumsey, Clare, Jin, Terry Z., Ely, John A., Shaw, Clive, Northrop, Ian G., Pooley, Guy, D'Alessandro, Robert, Doherty, Peter, Willatt, Greg P.
The Arcminute Microkelvin Imager (AMI) telescopes located at the Mullard Radio Astronomy Observatory near Cambridge have been significantly enhanced by the implementation of a new digital correlator with 1.2 MHz spectral resolution. This system has r
Externí odkaz:
http://arxiv.org/abs/1707.04237
We have obtained a firm detection of Cyg X-1 during its hard and intermediate spectral states in the energy range of 40 MeV--60 GeV based on observations by the Fermi Large Area Telescope, confirming the independent results at $\geq$60MeV of a previo
Externí odkaz:
http://arxiv.org/abs/1607.05059
Autor:
Peris, Charith S., Remillard, Ronald A., Steiner, James F., Vrtilek, Saeqa D., Varniere, Peggy, Rodriguez, Jerome, Pooley, Guy
We report on the X-ray spectral behavior within the steady states of GRS 1915+105. Our work is based on the full data set on the source obtained using the Proportional Counter Array on the Rossi X-ray Timing Explorer and 15 GHz radio data obtained us
Externí odkaz:
http://arxiv.org/abs/1509.08941
Publikováno v:
MNRAS, 456, 775 (2016)
We study the radio/X-ray correlation in Cyg X-3. It has been known that the soft and hard X-ray fluxes in the hard spectral state are correlated positively and negatively, respectively, with the radio flux. We show that this implies that the observed
Externí odkaz:
http://arxiv.org/abs/1508.02049
Autor:
Bodaghee, Arash, Tomsick, John A., Pottschmidt, Katja, Rodriguez, Jerome, Wilms, Joern, Pooley, Guy G.
Detecting gamma-rays from microquasars is a challenging but worthwhile endeavor for understanding particle acceleration, the jet mechanism, and for constraining leptonic/hadronic emission models. We present results from a likelihood analysis on times
Externí odkaz:
http://arxiv.org/abs/1307.3264
Autor:
Consortium, AMI, Shimwell, Timothy W., Carpenter, John M., Feroz, Farhan, Grainge, Keith J. B., Hobson, Michael P., Hurley-Walker, Natasha, Lasenby, Anthony N., Olamaie, Malak, Perrott, Yvette C., Pooley, Guy G., Rodriguez-Gonzalvez, Carmen, Rumsey, Clare, Saunders, Richard D. E., Schammel, Michel P., Scott, Paul F., Titterington, David J., Waldram, Elizabeth M.
We present CARMA observations of a massive galaxy cluster discovered in the AMI blind SZ survey. Without knowledge of the cluster redshift a Bayesian analysis of the AMI, CARMA and joint AMI & CARMA uv-data is used to quantify the detection significa
Externí odkaz:
http://arxiv.org/abs/1305.6655