V877 Ara: A New SU UMa Star with P=0.084d
R. Stubbings reported on June 7 that this dwarf nova experienced a bright
outburst (13.8-13.9mag)(vsnet-campaign-dn
2526). The data taken by R. Santallo on June 9 showed fully developed
superhumps (amplitude 0.25-0.30 mag), establishing that V877 Ara is a new
member of SU UMa-type dwarf novae (vsnet-campaign-dn
2538). T. Kato noticed that the position of the object may be different
from previous identifications (vsnet-campaign-dn
2540). H. Yamaoka reported the object is identified with a USNO_A2.0
star of r=17.8mag (vsnet-campaign-dn
2543). T. Kato reported a superhump period of 0.08458(3) d using the
light curves obtained by S. Walker, G. Bolt and R. Santallo (vsnet-campaign-dn
2546, 2548).
Superhump periods were variable, and the inferred period change was reported
to be an order of -2x10^(-4), which is the largest period change ever observed
in long-period SU UMa-type systems (vsnet-campaign-dn
2566).
In the light curve taken by T. Richards on June 17, superhumps were still
observed and the secondary humps became evident (vsnet-campaign-dn
2578, 2580).
The mean superhump period was around 0.0841 d, and the large period change
was confirmed also in the data on June 17 (vsnet-campaign-dn
2584). In the light curve taken by G. Bolt, superhumps were also detected
and additionally, a temporary fading by 0.15mag were seen (vsnet-campaign-dn
2587). The object entered a rapid fading phase since June 18 (vsnet-campaign-dn
2591, 2599).
Another outburst of 14.3mag was reported by R. Stubbings on October 11 (vsnet-campaign-dn
2891).
Other articles:
vsnet-campaign-dn
2545, 2550,
2557,
2562,
2571,
2576
Links:
Images taken by R. Santallo:
/vsnet/ftpfile/DNe/V877_Ara/san1.jpg
[vsnet-campaign-dn
2540]
Superhump light curve:
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/v877ara.html
[vsnet-campaign-dn
2547]
Time series observations by T. Richards, see [vsnet-campaign-data
97]
CCD image taken by B. Monard:
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/v877ara.html
[vsnet-campaign-dn
2595]
Preprint by Kato et al.:
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-preprint/msg00093.html
VSNET special page for this object:
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/v877ara.html