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UBVRI Light Curves of 44 Type Ia Supernovae
Saurabh Jha, Robert P. Kirshner, Peter Challis +2
We present UBVRI photometry of 44 type-Ia supernovae (SN Ia) observed from 1997 to 2001 as part of a continuing monitoring campaign at the Fred Lawrence Whipple Observatory of the…
Characterizing the QPO Behavior of the X-ray Nova XTE J1550--564
Ronald A. Remillard, Gregory J. Sobczak, Michael P. Muno +1
For all 209 RXTE observations of the X-ray nova XTE J1550-564 during its major outburst of 1998-1999, we have analyzed the X-ray power spectra, phase lags, and coherence functions.…
Optical Observations of the Black Hole Candidate XTE J1550-564 During Re-Flare and Quiescence
Raj K. Jain, Charles D. Bailyn, Jerome A. Orosz +3
We report optical monitoring of the soft X-ray transient XTE J1550-564 during the 1999 season (4 January 1999 to 24 August 1999). The first optical observations available in 1999 s…
Complete RXTE Spectral Observations of the Black Hole X-ray Nova XTE J1550-564
Gregory J. Sobczak, Jeffrey E. McClintock, Ronald A. Remillard +5
We report on the X-ray spectral behavior of the exceptionally bright X-ray nova XTE J1550-564 during its 1998-99 outburst. Our study is based on 209 pointed observations using the…
Characterizing the Low-Frequency QPO behavior of the X-ray Nova XTE J1550-564
Gregory J. Sobczak, Ronald A. Remillard, Michael P. Muno +1
For all 209 RXTE observations of the 7-Crab X-ray nova XTE J1550-564, we analyzed the X-ray power spectra, phase lags, and coherence functions. These observations cover the entire…
Correlations between Low-Frequency QPOs and Spectral Parameters in XTE J1550-564 and GRO J1655-40
Gregory J. Sobczak, Jeffrey E. McClintock, Ronald A. Remillard +5
Utilizing observations obtained with the Rossi X-ray Timing Explorer, we examine correlations between the properties of 0.08-22 Hz variable frequency QPOs and the X-ray spectral pa…
X-ray Nova XTE J1550-564: Discovery of a QPO Near 185 Hz
R. A. Remillard, J. E. McClintock, G. J. Sobczak +4
We have investigated the X-ray timing properties of XTE J1550-564 during 60 RXTE PCA observations made between 1998 September 18 and November 28. We detect quasi-periodic oscillati…
X-ray Nova XTE J1550-564: RXTE Spectral Observations
G. J. Sobczak, J. E. McClintock, R. A. Remillard +4
Excellent coverage of the 1998 outburst of the X-ray Nova XTE J1550-564 was provided by the Rossi X-ray Timing Explorer. XTE J1550-564 exhibited an intense (6.8 Crab) flare on 1998…
RXTE Spectral Observations of the 1996-97 Outburst of the Microquasar GRO J1655-40
Gregory J. Sobczak, Jeffrey E. McClintock, Ronald A. Remillard +2
Excellent coverage of the entire 16-month 1996-97 outburst cycle of GRO J1655-40 was provided by RXTE. We present a full spectral analysis of these data, which includes 52 PCA spec…