[Aavso-photometry] 2 New Observing Objects: AB Nor and ASAS 002511+1217.2

Aaron Price aaronp at onceler.org
Wed Sep 15 12:30:32 EDT 2004


 Here are two active dwarf novae observing projects, one for each
hemisphere:

** Southern Observers (and northern observers who can get to -42):

 AB Nor may be in outburst. The timing of this report follows its previous
outbursting behavior. Take a look and, if it is in outburst, please begin
taking quality time series observations for *as long as possible*. We need
to minimize the longitudinal observing gaps between Australlia/NZ, South
America (we really need South American observations!) and South Africa.
 Kato published a good paper on this star in MNRAS in January, 2004.
While he has much of the basic system parameters determined, he mentions
their coverage still leaves some answers open such as the evolution of
superhump behavior and calls for more observations. Also, his light curve
only shows superoutbursts and no confirmed regular outbursts.  This object
is unique enough with its long orbital period (just below the gap) and low
outburst rate that it is of some interest to the general community. So any
data is helpful.

  1542-42  AB NOR (UGSU):
    SEP 15.4610    15.0   SRX  Y      STUBBINGS, ROD   AUSTRALIA

 We have no online charts for AB Nor so just do the best you can and get
data as soon as possible. We'll come up with some comp stars soon. The
location is:       ra=15 49 15.48   dec=-43 04 48.7

** Northern Observers:

 - ASAS 002511+1217.2 (00 25 11 +12 17 12, Eqnx 2000)

   Grzegorz Pojmanski reports it may be a new bright dwarf nova:
 Observations:           V
 HJD (2450000+)   AP_0   AP_1
 3254.86329      (invisible)
 3259.70301      12.463 10.487
 3263.79241      11.074 11.076
 3263.79528      11.115 11.101

It is unclear whether it is past maximum or now. Time series observations
unfiltered or in V would be very useful. Try to go as long as possible.


Aaron



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