526 citations · 2.8k across the 86 of their papers we have counts for
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A Golden Standard Type Ia Supernova SN 2005cf: Observations from the Ultraviolet to the Near-Infrared Wavebands
Xiaofeng Wang, Weidong Li, Alexei V. Filippenko +31
We present extensive photometry at ultraviolet (UV), optical, and near-infrared (NIR) wavelengths, as well as dense sampling of optical spectra, for the normal type Ia supernova (S…
Distance Determination of Variable Galactic Sources
J. Hu, S. N. Zhang, T. P. Li
We have developed a timing analysis method to determine the distances of variable galactic X-ray sources based on the method advanced by Trümper and Schönfelder in 1973. The light-…
The Burst and Transient Source Experiment Earth Occultation Technique
B. A. Harmon, G. J. Fishman, C. A. Wilson +7
An Earth orbiting detector sensitive to gamma ray photons will see step-like occultation features in its counting rate when a gamma ray point source crosses the Earth's limb. This…
Evolution of Iron K Line Emission in the Black Hole Candidate GX 339-4
Y. X. Feng, S. N. Zhang, X. Sun +3
GX 339-4 was regularly monitored with RXTE during a period (in 1999) when its X-ray flux decreased significantly (from 4.2 erg cm to 7.6$\times 10^{-…
The Timing Evolution of 4U 1630-47 During its 1998 Outburst
S. W. Dieters, T. Belloni, E. Kuulkers +8
We report on the evolution of the timing of 4U1630-47 during its 1998 outburst using data obtained with the Rossi X-ray Timing Explorer (RXTE). The count rate and position in hardn…
Hard X-ray detection of the high redshift quasar 4C 71.07
A. Malizia, L. Bassani, A. J. Dean +3
BATSE/OSSE observations of the high redshift quasar 4C 71.07 indicate that this is the brightest and furthest AGN so far detected above 20 keV. BATSE Earth occultation data have be…
BATSE Observations of the Piccinotti Sample of AGN
A. Malizia, L. Bassani, S. N. Zhang +3
BATSE Earth occultation data have been used to search for emission in the 20-100 keV band from all sources in the Piccinotti sample, which represents to date the only complete 2-10…
Hard X-ray lags in GRO J1719-24
F. van der Hooft, C. Kouveliotou, J. van Paradijs +7
We have used the Fourier cross spectra of GRO J1719-24, as obtained with BATSE, to estimate the phase lags between the X-ray flux variations in the 20--50 and 50--100 keV energy ba…
Hard X-ray variability of the black-hole candidate GRO J0422+32 during its 1992 outburst
F. van der Hooft, C. Kouveliotou, J. van Paradijs +7
We have studied the hard X-ray variability of the soft X-ray transient GRO J0422+32 with BATSE in the 20-100 keV energy band. Our analysis covers 180 days following the first X-ray…
Discovery of Correlated Behavior Between the HXR and the Radio Bands in Cygnus X-3
M. L. McCollough, C. R. Robinson, S. N. Zhang +8
Using CGRO/BATSE hard X-ray (HXR) data and GHz radio monitoring data from the Green Bank Interferometer (GBI), we have performed a long term study ( 1800 days) of the unusual…
RXTE Observations of Cygnus X-3
M. L. McCollough, C. R. Robinson, S. N. Zhang +12
In the period between May 1997 and August 1997 a series of pointed RXTE observations were made of Cyg X-3. During this period Cyg X-3 made a transition from a quiescent radio state…
Evolution of AQL X-1 During the Rising Phase of its 1998 Outburst
Wei Cui, Didier Barret, S. N. Zhang +3
We present results from 16 snapshots of Aql X-1 with RXTE during the rising phase of its recent outburst. The observations were carried out at a typical rate of once or twice per d…
Milli-second Oscillations in the Persistent and Bursting Flux of Aql X-1 During an Outburst
W. Zhang, K. Jahoda, R. L. Kelley +2
The Rossi X-Ray Timing Explorer observed the soft X-Ray transient Aql X-1 during its outburst in February and March 1997. We report the discovery of quasi-periodic oscillations (QP…
Spectral State Transitions in Aql X-1: Evidence for `Propeller' Effects
S. N. Zhang, W. Yu, W. Zhang
Aql X-1 is a soft X-ray transient source and emits type I X-ray bursts. A spectral state transition was observed with RXTE during its outburst decay in February and March 1997. Its…
A Sequence of Declining Outbursts from GX339-4
B. C. Rubin, B. A. Haron, W. S. Paciesas +3
The flux and spectrum of the black hole candidate GX339-4 has been monitored by the Burst and Transient Source Experiment (BATSE) on the Compton Gamma-ray Observatory (CGRO) since…
Evidence for Frame-Dragging Around Spinning Black Holes in X-Ray Binaries
Wei Cui, S. N. Zhang, Wan Chen
In the context of black hole spin in X-ray binaries, we propose that certain type of quasi-period oscillations (QPOs) observed in the light curves of black hole binaries (BHBs) are…
Galactic Black Hole Binaries: Multifrequency Connections
S. N. Zhang, I. F. Mirabel, B. A. Harmon +4
We review the recent multifrequency studies of galactic black hole binaries, aiming at revealing the underlying emission processes and physical properties in these systems. The opt…
Black Hole Spin in X-Ray Binaries: Observational Consequences
S. N. Zhang, Wei Cui, Wan Chen
We discuss the observational consequences of black hole spin in X-ray binaries within the framework of the standard thin accretion disk model. When compared to theoretical flux dis…
Temporal Properties of Cygnus X-1 During the Spectral Transitions
Wei Cui, S. N. Zhang, W. Focke +1
We report the results from our timing analysis of 15 RXTE observations of Cygnus X-1 throughout its 1996 spectral transitions. The entire period can be divided into 3 distinct phas…
Discovery of a non-blazar gamma-ray transient near the Galactic plane: GRO J1838-04
M. Tavani, R. Mukherjee, J. R. Mattox +6
We report the discovery of a remarkable gamma-ray transient source near the Galactic plane, GRO J1838-04. This source was serendipitously discovered by EGRET in June 1995 with a pe…
The 1996 Soft State Transitions of Cygnus X-1
S. N. Zhang, W. Cui, B. A. Harmon +3
We report continuous monitoring of Cygnus X-1 in the 1.3 to 200 keV band using ASM/RXTE and BATSE/CGRO for about 200 days from 1996 February 21 to 1996 early September. During this…
Dual Nature of Hard X-Ray Outbursts from the Superluminal X-Ray Transient Source GRO J1655-40
M. Tavani, A. Fruchter, S. N. Zhang +5
We report the results of multiwavelength observations of the superluminal X-ray transient GRO J1655-40 during and following the prominent hard X-ray outburst of March-April 1995. G…
Evidence from quasi-periodic oscillations for a millisecond pulsar in the low mass x-ray binary 4U 0614+091
E. Ford, P. Kaaret, M. Tavani +6
We have detected quasi-periodic oscillations (QPOs) near 1 kHz from the low mass X-ray binary 4U 0614+091 in observations with XTE. The observations span several months and sample…