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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; 4:57 UT
Distributed as an Instant Email Notice (Nova)
Password Certification: Jan-Uwe Ness (Jan-Uwe.Ness@asu.edu)
Subjects: Ultra-Violet, X-ray, Cataclysmic Variables, Nova, Transients
We have obtained two Swift observations of the fast nova V2467 Cyg (IAUC #8821, CBET #894, 897, 900). 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 (0.017±0.002) counts per second (cps). We also obtained UV magnitudes from the UVOT filters uvw1, uvw2, and uvm2, and found 18.26±0.18, 19.41±0.37, and 20.28±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 (0.048±0.003) cps. The UVOT v filter yields a magnitude of 15.68±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 http://erica.la.asu.edu/~ness/v2467_lc.gif and the spectra under http://erica.la.asu.edu/~ness/v2467_spec.gif.
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 N=8.7×10cm for the first observation and kT=46 eV and N=5.2×10cm for the second observation. With a total of 80 counts and 198 counts in the respective first and second observations, these parameters are poorly constrained.
We thank the Swift PI and operations team for their support.