Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Leighly, K. M."'
Autor:
Shappee, B. J., Prieto, J. L., Grupe, D., Kochanek, C. S., Stanek, K. Z., De Rosa, G., Mathur, S., Zu, Y., Peterson, B. M., Pogge, R. W., Komossa, S., Im, M., Jencson, J., Holoien, T. W-S., Basu, U., Beacom, J. F., Szczygiel, D. M., Brimacombe, J., Adams, S., Campillay, A., Choi, C., Contreras, C., Dietrich, M., Dubberley, M., Elphick, M., Foale, S., Giustini, M., Gonzalez, C., Hawkins, E., Howell, D. A., Hsiao, E. Y., Koss, M., Leighly, K. M., Morrell, N., Mudd, D., Mullins, D., Nugent, J. M., Parrent, J., Phillips, M. M., Pojmanski, G., Rosing, W., Ross, R., Sand, D., Terndrup, D. M., Valenti, S., Walker, Z., Yoon, Y.
After the All-Sky Automated Survey for SuperNovae (ASAS-SN) discovered a significant brightening of the inner region of NGC 2617, we began a ~70 day photometric and spectroscopic monitoring campaign from the X-ray through near-infrared (NIR) waveleng
Externí odkaz:
http://arxiv.org/abs/1310.2241
Publikováno v:
Astrophys.J.632:793-798,2005
We present the results of timing analysis of the XMM-Newton observation of the Seyfert 2 galaxy NGC 6300. The hard X-ray spectrum above 2 keV consists of a Compton-thin-absorbed power law, as is often seen in Seyfert 2 galaxies. We clearly detected r
Externí odkaz:
http://arxiv.org/abs/astro-ph/0507469
Publikováno v:
Astron.J. 128 (2004) 1524
We report the results of two Chandra ACIS-S observations from February and August 2003 of the highly X-ray variable Narrow-Line Seyfert 1 galaxy RX J2217.9--5941. Observations spanning the time from the ROSAT All Sky Survey (RASS) through an ASCA obs
Externí odkaz:
http://arxiv.org/abs/astro-ph/0406068
Publikováno v:
Astron.J.127:156,2004
We present the optical spectra and simple statistical analysis for a complete sample of 110 soft X-ray selected AGN. About half of the sources are Narrow-Line Seyfert 1 galaxies (NLS1s), which have the steepest X-ray spectra, strongest FeII emission
Externí odkaz:
http://arxiv.org/abs/astro-ph/0310027
Publikováno v:
Astrophys.J. 592 (2003) 42-51; Erratum-ibid. 601 (2004) 1159
Large amplitude, high luminosity soft X-ray flares were detected by the ROSAT All-Sky Survey in several galaxies with no evidence for Seyfert activity in their ground-based optical spectra. These flares had the properties predicted for a tidal disrup
Externí odkaz:
http://arxiv.org/abs/astro-ph/0304063
Publikováno v:
Astrophys.J. 585 (2003) 665-676
The Deep Survey instrument on the Extreme Ultraviolet Explorer satellite (EUVE) obtained long, nearly continuous soft X-ray light curves of 5-33 days duration for 14 Seyfert galaxies and QSOs. We present a uniform reduction of these data, which accou
Externí odkaz:
http://arxiv.org/abs/astro-ph/0211185
Publikováno v:
Astrophys.J. 578 (2002) L37-L40
The usual interpetation of the spectrum of a BAL QSO is that a broad-band continuum from the central engine plus broad emission lines from a surrounding region (the BELR) emerges from near the center of the QSO, and broad absorption lines are superim
Externí odkaz:
http://arxiv.org/abs/astro-ph/0208513
(Abridged) We present an analysis of a 10-day continuous ASCA observation of the narrow-line Seyfert 1 galaxy IRAS 13224-3809. The soft (0.7-1.3 keV) and hard (1.3-10 keV) X-ray band light curves binned to 5000s reveal trough-to-peak variations by a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0205114
Autor:
Moran, E. C., Eracleous, M., Leighly, K. M., Chartas, G., Filippenko, A. V., Ho, L. C., Blanco, P. R.
We present the results of a 17 ks Chandra observation of the nearby dwarf spiral galaxy NGC 4395, focusing on the X-ray properties of the moderate-mass black hole that resides in its nucleus. Chandra affords the first high-quality, broadband X-ray de
Externí odkaz:
http://arxiv.org/abs/astro-ph/0111472
Autor:
Halpern, J. P., Camilo, F., Gotthelf, E. V., Helfand, D. J., Kramer, M., Lyne, A. G., Leighly, K. M., Eracleous, M.
We report the detection of radio and X-ray pulsations at a period of 51.6 ms from the X-ray source RX/AX J2229.0+6114 in the error box of the EGRET source 3EG J2227+6122. An ephemeris derived from a single ASCA observation and multiple epochs at 1412
Externí odkaz:
http://arxiv.org/abs/astro-ph/0104109