Abstract
Much of the visual and ultraviolet luminosity in X-ray novae is likely to result from reprocessing of X-rays illuminating an accretion disk. During the initial stages of its 1992 outburst, GRO J0422+32 exhibited short-time-scale flickering intense enough to be seen in the individual BATSE LAD detectors with a nominal 1-second time resolution. We obtained photometry with continuous minute sampling during this period, in which short-time-scale flickering as well as hourly trends are evident. In addition, we obtained resolution spectroscopy sampled at 10-minute intervals over a baselines comparable to a binary orbital period. We present results of cross-correlation analysis between the optical and hard X-ray of time-series data sets. No statistically significant time lags can be established. For the more recent X-ray nova GRO 1655 40, we have spectra obtained on separate nights within one weeks time, bracketing an upturn in the BATSE light curve, which exhibited dramatic evolution.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 261-263 |
| Number of pages | 3 |
| Journal | Astronomy and Astrophysics Supplement Series |
| Volume | 120 |
| Issue number | 4 |
| State | Published - 1996 |
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Keywords
- Accretion
- Accretion disks x-rays
- Individual (GRO J0422+32, GRO J1655 40)
- Stars -novae - Stars
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Reprocessing of hard X-ray emission in X-ray novae. / Shrader, C. R.; Wagner, R. M.; Hjellming, R. M.; Starrfield, Sumner.
In: Astronomy and Astrophysics Supplement Series, Vol. 120, No. 4, 1996, p. 261-263.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Reprocessing of hard X-ray emission in X-ray novae
AU - Shrader, C. R.
AU - Wagner, R. M.
AU - Hjellming, R. M.
AU - Starrfield, Sumner
PY - 1996
Y1 - 1996
N2 - Much of the visual and ultraviolet luminosity in X-ray novae is likely to result from reprocessing of X-rays illuminating an accretion disk. During the initial stages of its 1992 outburst, GRO J0422+32 exhibited short-time-scale flickering intense enough to be seen in the individual BATSE LAD detectors with a nominal 1-second time resolution. We obtained photometry with continuous minute sampling during this period, in which short-time-scale flickering as well as hourly trends are evident. In addition, we obtained resolution spectroscopy sampled at 10-minute intervals over a baselines comparable to a binary orbital period. We present results of cross-correlation analysis between the optical and hard X-ray of time-series data sets. No statistically significant time lags can be established. For the more recent X-ray nova GRO 1655 40, we have spectra obtained on separate nights within one weeks time, bracketing an upturn in the BATSE light curve, which exhibited dramatic evolution.
AB - Much of the visual and ultraviolet luminosity in X-ray novae is likely to result from reprocessing of X-rays illuminating an accretion disk. During the initial stages of its 1992 outburst, GRO J0422+32 exhibited short-time-scale flickering intense enough to be seen in the individual BATSE LAD detectors with a nominal 1-second time resolution. We obtained photometry with continuous minute sampling during this period, in which short-time-scale flickering as well as hourly trends are evident. In addition, we obtained resolution spectroscopy sampled at 10-minute intervals over a baselines comparable to a binary orbital period. We present results of cross-correlation analysis between the optical and hard X-ray of time-series data sets. No statistically significant time lags can be established. For the more recent X-ray nova GRO 1655 40, we have spectra obtained on separate nights within one weeks time, bracketing an upturn in the BATSE light curve, which exhibited dramatic evolution.
KW - Accretion
KW - Accretion disks x-rays
KW - Individual (GRO J0422+32, GRO J1655 40)
KW - Stars -novae - Stars
UR - http://www.scopus.com/inward/record.url?scp=23544469780&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=23544469780&partnerID=8YFLogxK
M3 - Article
VL - 120
SP - 261
EP - 263
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
SN - 0004-6361
IS - 4
ER -