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Observations of classical and recurrent novae with X-ray gratings

Orio, M.

X-ray grating spectra have opened a new window on nova physics. High signal-to-noise spectra have been obtained for 12 novae after the outburst in the last 13 years, with the Chandra and XMM-Newton gratings. They offer the only way to probe the temperature, effective gravity and chemical composition of the hydrogen burning white dwarf before it tu…

High-resolution spectroscopy and high-density monitoring in X-rays of novae

Ness, J. U.

The 21st century X-ray observatories XMM-Newton, Chandra, and Swift gave us completely new insights into the X-ray behaviour of nova outbursts. These new-generation X-ray observatories provide particularly high spectral resolution and high density in monitoring campaigns, simultaneously in X-rays and UV/optical. The entire evolution of several nov…

Investigation of variability of iron emission lines in Centaurus X-3

Paul, Biswajit; Naik, Sachindra

We present the results obtained from a study of the variability of iron emission lines in the high mass X-ray binary pulsar Cen~X-3 during the eclipse, eclipse-egress and out-of-eclipse phases using XMM-Newton observations. Three iron emission lines at 6.4 keV, 6.7 keV, and 6.97 keV are clearly detected in the spectrum of the pulsar during the ent…

Simultaneous X-ray and optical observations of thermonuclear bursts in the LMXB EXO 0748-676

Paul, Biswajit; Saripalli, Lakshmi; Archana, M.

We report the detection of a large number of optical bursts in the Low Mass X-ray Binary (LMXB) EXO 0748-676 simultaneous with the thermonuclear X-ray bursts. The X-ray and the optical bursts are detected in a long observation of this source with the XMM-Newton observatory. This has increased the number of thermonuclear X-ray bursts in the LMXBs w…