117 citations · 387 across the 17 of their papers we have counts for
9 papers · 1 filter
A Possible Emission Feature in an X-ray Afterglow of GRB970828 as a Radiative Recombination Edge
A. Yoshida, M. Namiki, D. Yonetoku +6
A gamma-ray burst of 28 August 1997 was localized by the All-Sky Monitor on the Rossi XTE satellite and its coordinates were promptly disseminated. An ASCA followup started 1.17 da…
RE J2248-511 - Not all variable, ultrasoft, X-ray AGN have narrow Balmer lines
A. A. Breeveld, E. M. Puchnarewicz, C. Otani
We present ASCA data on RE J2248-511, extending existing optical and soft X-ray coverage to 10 keV, and monitoring the soft component. These data show that, despite a very strong u…
ASCA Observations of the Seyfert 2 Galaxy NGC 7582: An Obscured and Scattered View of the Hidden Nucleus
S. -J. Xue, C. Otani, T. Mihara +2
ASCA observations of the Seyfert 2 galaxy NGC 7582 revealed it was highly variable on the timescale of s in the hard X-ray (2-10 keV) band, while the soft X-ray (…
BeppoSAX observation of NGC 7674: a new reflection-dominated Seyfert 2 galaxy
G. Malaguti, G. G. C. Palumbo, M. Cappi +6
The Seyfert 2 galaxy NGC 7674 has been observed within the BeppoSAX Core Programme with the onboard narrow field instruments between 0.1 and 100 keV. The broad-band spectrum shows…
Multiwavelength Monitoring of the BL Lacertae Object PKS 2155-304 in May 1994. III. Probing the Inner Jet through Multiwavelength Correlations
C. Megan Urry, A. Treves, L. Maraschi +16
In May 1994 the BL Lac object PKS 2155-304 was observed continuously for ~10 d with IUE and EUVE and for 2 d with ASCA, as well as with ROSAT and with ground- based radio, IR, and…
The ASCA X-ray spectrum of the powerful radio galaxy 3C109
S. W. Allen, A. C. Fabian, E. Idesawa +3
We report the results from an ASCA X-ray observation of the powerful Broad Line Radio Galaxy, 3C109. The ASCA spectra confirm our earlier ROSAT detection of intrinsic X-ray absorpt…
Spectral Variability and iron line emission in the ASCA Observations of the Seyfert 1 Galaxy NGC4051
Matteo Guainazzi, Tatehiro Mihara, Chiko Otani +1
We present the results of an extensive analysis of the ``ASCA'' AO2 observation of the Seyfert 1 galaxy NGC4051. The target exhibits broadband [0.5--10 keV] variability by a factor…
ASCA Observations of the Composite Warm Absorber in NGC 3516
G. A. Kriss, J. H. Krolik, C. Otani +11
We obtained X-ray spectra of the Seyfert 1 galaxy NGC~3516 in March 1995 using ASCA. Simultaneous far-UV observations were obtained with HUT on the Astro-2 shuttle mission. The ASC…
Warm absorber, reflection and Fe K line in the X-ray spectrum of IC 4329A
M. Cappi, T. Mihara, M. Matsuoka +3
Results from the X-ray spectral analysis of the ASCA PV phase observation of the Seyfert 1 galaxy IC 4329A are presented. We find that the 0.4 - 10 keV spectrum of IC 4329A is best…