17 Sept 2004: TY PsA superoutburst
Observations: Sept ,Oct 2004
Updated: 24 January 2005
TY PsA was 4 magnitudes brighter than usual in September 2004.
17 September 2004: During a robotic search for variables and intruders,
the cataclysmic star TY PsA was detected as very bright. Its Rc magnitude
was about 12.2 (with USNO-A2.0 as the COMP).
TY PsA is a SU UMa dwarf nova with an orbital period of 2.02 hours. It
can show outbursts, superoutbursts and superhumps. The interval between
outbursts is 30-50d, between superoutbursts 202d with a superoutburst magnitude of 12
(Ritter Kolb (2003))
Time serie observations were tried but the object was very low over the
horizon (air mass > 4), could not be observed for a long time, and the
weather was very bad. Some results are here.
1 October 2004: TY PsA was back in quiescence. Its Rc magnitude was 16.4.
Animation from an image on 17 Sept and an image on 1 Oct. The telescope
is a 203mm SCT with a Rc filter and a SBIG STE7 (KAF401E CCD) camera. Each exposure
is 1 minute. The COMP star has a yellow circle, TY Psa has a magenta circle
and K_TY-PsA is the check star.
H. Ritter, U. Kolb (2003) Catalogue
of cataclysmic binaries, low-mass X-ray binaries and related objects VizieR