Filters: Collection: "ir_uspace" Subject: "X-rays"
1 - 25 of 4
| Creator | Title | Description | Subject | Date | ||
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Kieda, David B. | High statistics search for ultrahigh energy gamma-ray emission from Cygnus X-3 and Hercules X-1 | We have carried out a high statistics (2 X 10 9 events) search for ultrahigh energy g-ray emission from the x-ray binary sources Cygnus X-3 and Hercules X-1. Using data taken with the CASA-MIA detector over a five year period (1990-1995), we find no evidence for steady emission from either source. T... | Cygnus X-3; Hercules X-1; Ultrahigh energy; X-rays | 1997 |
| 2 |
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Dawson, Kyle | Masses of high-redshift clusters via SZ effect observations | We present Sunyaev-Zel'dovich Effect (SZE) observations of distant, highly X-ray luminous clusters of galaxies. We use the SZE data to constrain their total masses, independent of X-ray observations. To do this, we assume the clusters have the same gas mass fraction as that derived from SZE measure... | Sunyaev-Zel'dovich Effect; X-rays; Redshift | 2002 |
| 3 |
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Dawson, Kyle | Multi-wavelength study of XMMU J2235.3-2557: the most massive galaxy cluster at z > 1 | The galaxy cluster XMMU J2235.3−2557 (hereafter XMM2235), spectroscopically confirmed at z = 1.39, is one of the most distant X-ray selected galaxy clusters. It has been at the center of a multi-wavelength observing campaign with ground and space facilities. Aims. We characterize the galaxy popula... | XMMU J2235.3-2557; XMM2235; X-rays; Redshift | 2009-12 |
| 4 |
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Gondolo, Paolo | Variable stars toward the bulge of M 31: the AGAPE catalogue | We present the AGAPE astrometric and photometric catalogue of 1579 variable stars in a 14' × 10' field centred on M 31. This work is the first survey devoted to variable stars in the bulge of M 31. The R magnitudes of the objects and the B − R colours suggest that our sample is dominated by red l... | M31; AGAPE; X-rays; Cepheids; Novae | 2004-07 |
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