Zobrazeno 1 - 10
of 132
pro vyhledávání: '"Zavlin, V."'
Autor:
Espinoza, C. M., Guillemot, L., Celik, O., Weltevrede, P., Stappers, B. W., Smith, D. A., Kerr, M., Zavlin, V. E., Cognard, I., Eatough, R. P., Freire, P. C. C., Janssen, G. H, Camilo, F., Desvignes, G., Hewitt, J. W., Hou, X., Johnston, S., Keith, M., Kramer, M., Lyne, A., Manchester, R. N., Ransom, S. M., Ray, P. S., Shannon, R., Theureau, G., Webb, N.
We report on the discovery of gamma-ray pulsations from five millisecond pulsars (MSPs) using the Fermi Large Area Telescope (LAT) and timing ephemerides provided by various radio observatories. We also present confirmation of the gamma-ray pulsation
Externí odkaz:
http://arxiv.org/abs/1212.4360
Autor:
Lemoine-Goumard, M., Zavlin, V. E., Grondin, M. -H., Shannon, R., Smith, D. A., Burgay, M., Camilo, F., Cohen-Tanugi, J., Freire, P. C. C., Grove, J. E., Guillemot, L., Johnston, S., Keith, M., Kramer, M., Manchester, R. N., Michelson, P. F., Parent, D., Possenti, A., Ray, P. S., Renaud, M., Thorsett, S. E., Weltevrede, P., Wolff, M. T.
Since the launch of the Fermi satellite, the number of known gamma-ray pulsars has increased tenfold. Most gamma-ray detected pulsars are young and energetic, and many are associated with TeV sources. PSR J1357-6429 is a high spin-down power pulsar (
Externí odkaz:
http://arxiv.org/abs/1108.0161
Autor:
Weisskopf, M. C., Guainazzi, M., Jahoda, K., Shaposhnikov, N., O'Dell, S. L., Zavlin, V. E., Wilson-Hodge, C., Elsner, R. F.
Motivated by a paper (Kirsch et al. 2005) on possible use of the Crab Nebula as a standard candle for calibrating X-ray response functions, we examine consequences of intrinsic departures from a single (absorbed) power law upon such calibrations. We
Externí odkaz:
http://arxiv.org/abs/1003.1916
Publikováno v:
Astrophysical Journal 715 (2010) 66-77
Previous observations of the middle-aged pulsar Geminga with XMM-Newton and Chandra have shown an unusual pulsar wind nebula (PWN), with a 20" long central (axial) tail directed opposite to the pulsar's proper motion and two 2' long, bent lateral (ou
Externí odkaz:
http://arxiv.org/abs/1002.1109
Publikováno v:
Astrophys.J.699:1418-1422,2009
This paper presents the analysis of candidate quiescent low mass xray binarie (qLMXBs) observed during a short Chandra/ACIS observation of the globular cluster (GC) NGC 6304. Two out of the three candidate qLMXBs of this cluster, XMMU 171433-292747 a
Externí odkaz:
http://arxiv.org/abs/0903.4864
The remarkable astrometric capabilities of Chandra offer the possibility to measure proper motions of X-ray sources with an unprecedented accuracy in this wavelength range. We recently completed a proper motion survey of three of the seven thermally
Externí odkaz:
http://arxiv.org/abs/0901.1006
Publikováno v:
AIPConf.Proc.983:354-356,2008
The unprecedented spatial resolution of the Chandra observatory opens the possibility to detect with relatively high accuracy proper motions at X-ray wavelengths. We have conducted an astrometric study of three of the "Magnificent Seven", the thermal
Externí odkaz:
http://arxiv.org/abs/0712.0342
Publikováno v:
Astrophys.SpaceSci.308:151-160,2007
We present a brief review of Chandra X-ray Observatory observations of neutron stars. The outstanding spatial and spectral resolution of this great observatory have allowed for observations of unprecedented clarity and accuracy. Many of these observa
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606732
Publikováno v:
Astrophys.J.643:1146-1150,2006
The superb spatial resolution of Chandra has allowed us to detect a 20''-long tail behind the Geminga pulsar, with a hard spectrum (photon index 1.0+/-0.2) and a luminosity (1.3+/-0.2) 10^{29} ergs/s in the 0.5 - 8 keV band, for an assumed distance o
Externí odkaz:
http://arxiv.org/abs/astro-ph/0511364
Publikováno v:
Astrophys.J. 625 (2005) 307-323
We observed the gamma-ray pulsar Geminga with the HST STIS/MAMA detectors to measure the Geminga's UV spectrum and pulsations. The slope of the far-UV (FUV) spectrum is close to that of a Rayleigh-Jeans spectrum, suggesting that the FUV radiation is
Externí odkaz:
http://arxiv.org/abs/astro-ph/0502076