V844 Her

P. Schmeer reported a possible outburst (13.5mag) of the short period SU UMa-type dwarf nova, V844 Her on March 9 (vsnet-campaign-dn 2163). No confirmation was reported, and the object was  reported to be faint on March 10.  T. Kato commented that the object resembles SW UMa in its outburst pattern (vsnet-campaign-dn 2426). The last confirmed outburst was in 2001 August. The all recorded outbursts of V844 Her was superoutbursts.

H. McGee reported on May 18 that V844 Her experienced a bright outburst.  The detection of superhumps revealed that it was a superoutburst.  Superhumps decreased in amplitude from 0.3 to 0.1mag on May 20-24 (vsnet-campaign-dn 2448, 2462). The object entered a rapid fading phase from superoutburst in the end of May (vsnet-campaign-dn 2467, 2470, 2479).

Another bright outburst was detected by E. Muyllaert, P. Schmeer and H. McGee on October 23. The interval of the outbursts has become shorter than the previous values (vsnet-campaign-dn 2914). In the light curve taken by K. Tanabe on October 24, there was no strong superhump signal, indicating that the outburst was a normal outburst (vsnet-campaign-dn 2923). The object then quickly faded (vsnet-campaign-dn 2918, 2933).  It was reported to have been  still active at 14.2 mag on Oct. 28 (vsnet-campaign-dn 2942).

T. Kinnunen reported an outburst (12.5mag) on December 21.  The outburst interval was again unusually short.  The brightness and the long duration of the outburst indicated that it was a superoutburst (vsnet-campaign-dn 3176, 3181, 3190).  T. Kato reported that, if the superoutburst nature of the present outburst is confirmed, V844 Her belongs to rather unusual SU UMa-type dwarf novae having clearly different maximum magnitudes (cf. SW UMa, BC UMa) (vsnet-campaign-dn 3178).  

Other articles:
vsnet-campaign-dn 2432, 2436, 2447, 2450, 2920, 2926, 2925, 2931

General Information about This Object

Return to HomePage

Return to Daisaku Nogami's page


Powered by ooruri technology