The Astronomer's Telegram
Telegram Index | Search
To The Parent Site

[ Previous | Next ]

Nova 2005-09c in M31

ATEL # 1390; Marina Orio (INAF-Padova, and University of Wisconsin) and Thomas Nelson (University of Wisconsin)
on 18 Feb 2008; 16:58 UT
Distributed as an Instant Email Notice (Nova)
Password Certification: Marina Orio (

Subjects: X-ray, Nova

Marina Orio and Thomas Nelson report that the M31 nova 2005-09 c (Quimby et al. 2005, ATel 600, and Hatzidimitriou et al., A&A 464, 1075) is detected as a luminous supersoft X-ray source (SSS) in an archival XMM exposure taken 10 months after the optical maximum of this nova, on 2006-06-28, with a count rate 0.0100$\pm$0.0018 cts/s in the 0.15-1 keV range. Despite the poor signal to noise, no significant counts above the background are measured above 0.8 keV and the spectrum is consistent with a blackbody with luminosity 2.5-3 $\times 10^{37$ erg/s, blackbody temperature T~60 eV and column density N(H)>=1.3 10$^{21}$ cm$^{-2}$. M31 N 2005-09 was a Fe nova, and this is the first time the SSS behaviour of a classical nova in M31 can be correlated with its spectroscopic and photometric properties in the optical range.

[ Telegram Index ]

R. E. Rutledge , Editor
ATEL Mirror v1.0 Updates