EP Car: Possible short time modulations during February outburst

A. Pearce reported an outburst (14.8mag) of the suggested dwarf nova EP Car on February 16 (vsnet-alert 4232). The GCVS does not presented the true position of EP Car (vsnet-alert 4234). Some results of astrometry were reported: RA=10h28m23s.138 Dec=-58d57'58".21 identified with mb=20.8, mr=17.6 USNO star (by G. Garradd;vsnet-alert 4235); RA=10h28m23s.24, Dec=-58d57'58".7 identified with mb=18.7, mr=17.7 USNO star (by B. Skiff; vsnet-alert 4236, 4239); RA=10h28m24s.4, Dec=-58d58'01" identified with mb=18.5, mr=18.5 USNO star (by M. Morel;vsnet-alert 4237) (vsnet-alert 4241).

(CCD images taken by G. Garradd vsnet-alert 4240)

G. Garradd performed a 6-hour time-series photometry during the outburst. The first half of the data seemed to be indicate the presence of 0.1-mag modulation, which might be attributed to superhumps (vsnet-alert 4238). The second half of the data did not convincingly confirmed the recurring nature of the hump. The object brightened again by 0.1 mag at around February 17 14 h UT, but remained bright for at least the following two hours. The possibility of superhumps with a period shorter than 2 hours can be safely precluded, but the possibility for a longer period still remains (vsnet-alert 4245).

Light Curve and General Information of This Object