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Optical observations of "hot" novae returning to quiescence
P. Zemko, S. Ciroi, M. Orio +10
We have monitored the return to quiescence of novae previously observed in outburst as supersoft X-ray sources, with optical photometry of the intermediate polar (IP) V4743 Sgr and…
Multi-mission observations of the old nova GK Per during the 2015 outburst
P. Zemko, M. Orio, G. J. M. Luna +3
GK Per, a classical nova of 1901, is thought to undergo variable mass accretion on to a magnetized white dwarf (WD) in an intermediate polar system (IP). We organized a multi-missi…
V4743 Sgr, a magnetic nova?
P. Zemko, M. Orio, K. Mukai +3
Two XMM Newton observations of Nova V4743 Sgr (Nova Sgr 2002) were performed shortly after it returned to quiescence, 2 and 3.5 years after the explosion. The X-ray light curves re…
Multi-mission observations of the old nova GK Per during the 2015 outburst
Polina Zemko, Marina Orio, Gerardo Juan Manuel Luna +1
The remarkable old nova and an intermediate polar (IP) - GK Per was observed with Swift, the Chandra HETG and NuSTAR during its recent dwarf nova (DN) outburst in March - April 201…
Suzaku observation of the classical nova V2491 Cyg in quiescence
Polina Zemko, Koji Mukai, Marina Orio
We present Suzaku XIS observation of V2491 Cyg (Nova Cyg 2008 No. 2) obtained in quiescence, more than two years after the outburst. The nova was detected as a very luminous source…
X-ray observations of VY Scl type nova-like binaries in the high and low state
P. Zemko, M. Orio, K. Mukai +1
Four VY Scl-type nova-like systems were observed in X-rays during both the low and the high optical states. We examined Chandra, ROSAT, Swift and Suzaku archival observations of BZ…