Two SSS Swift X-ray spectra of Nova Cyg 2007 (V2467 Cyg)
ATel #1747; J.-U. Ness (Arizona State University), G. Schwarz (West Chester), J. P. Osborne and K. Page (University of Leicester), J. J. Drake (Smithsonian Astrophysical Observatory), J. Krautter (Landessternwarte Heidelberg)
on 27 Sep 2008; 04:57 UT
Distributed as an Instant Email Notice Novae
Credential Certification: Jan-Uwe Ness (Jan-Uwe.Ness@asu.edu)
Subjects: Ultra-Violet, X-ray, Cataclysmic Variable, Nova, Transient
We have obtained two Swift observations of the fast nova
The first observation was taken 2008, June 15.17, 459 days after outburst,
and the 5700-s exposure yields an average X-ray count rate of
counts per second (cps). We also obtained UV magnitudes from
the UVOT filters uvw1, uvw2, and uvm2, and found 18.26Â±0.18,
19.41Â±0.37, and 20.28Â±1.11, respectively.
100 days later, the second observation was taken (2008, September 23.3=559
days after outburst). The 5000-s observation yields a
higher XRT count rate of (0.048Â±0.003) cps.
The UVOT v filter yields a magnitude of 15.68Â±0.016. We found small
variations in the X-ray and UV data, but no period with a strong signal
in the periodogram is present. We also found no clear correlations between
UV and X-ray count rates.
The X-ray and UV light curves of both observations can be seen under
and the spectra under
The X-ray spectra were both soft with their peak at ~0.5 keV.
Blackbody fits to the XRT spectra yield the parameters
kT=34 eV and
for the first observation and
kT=46 eV and
for the second observation. With a total of 80 counts and 198 counts in
the respective first and second observations, these parameters are
We thank the Swift PI and operations team for their support.