Reprocessing of hard X-ray emission in X-ray novae

C. R. Shrader, R. M. Wagner, R. M. Hjellming, Sumner Starrfield

Research output: Contribution to journalArticle

4 Citations (Scopus)

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 languageEnglish (US)
Pages (from-to)261-263
Number of pages3
JournalAstronomy and Astrophysics Supplement Series
Volume120
Issue number4
StatePublished - 1996

Fingerprint

novae
x rays
timescale
accretion disks
outburst
night
illuminating
cross correlation
light curve
photometry
time lag
sampling
spectroscopy
accretion
luminosity
time series
intervals
trends
orbitals
reprocessing

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

Shrader, C. R., Wagner, R. M., Hjellming, R. M., & Starrfield, S. (1996). Reprocessing of hard X-ray emission in X-ray novae. Astronomy and Astrophysics Supplement Series, 120(4), 261-263.

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 journalArticle

Shrader, CR, Wagner, RM, Hjellming, RM & Starrfield, S 1996, 'Reprocessing of hard X-ray emission in X-ray novae', Astronomy and Astrophysics Supplement Series, vol. 120, no. 4, pp. 261-263.
Shrader, C. R. ; Wagner, R. M. ; Hjellming, R. M. ; Starrfield, Sumner. / Reprocessing of hard X-ray emission in X-ray novae. In: Astronomy and Astrophysics Supplement Series. 1996 ; Vol. 120, No. 4. pp. 261-263.
@article{143cad0ef39946708ed1a86feafaee62,
title = "Reprocessing of hard X-ray emission in X-ray novae",
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.",
keywords = "Accretion, Accretion disks x-rays, Individual (GRO J0422+32, GRO J1655 40), Stars -novae - Stars",
author = "Shrader, {C. R.} and Wagner, {R. M.} and Hjellming, {R. M.} and Sumner Starrfield",
year = "1996",
language = "English (US)",
volume = "120",
pages = "261--263",
journal = "Astronomy and Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",
number = "4",

}

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 -