[vsnet-alert 8639] Re: [vsnet-chat 7176] NSV 601 = New dwarf nova

[arne]

Magnitudes in quiescence:
  V   = 19.12
  B-V =  0.19
  V-R =  0.11
  R-I =  0.33
Errors about 0.1mag.  My field photometry file is available at:
ftp://ftp.nofs.navy.mil/pub/outgoing/aah/sequence/nsv601.dat
Arne

Sebastian Otero wrote:

> Dear colleagues,
>
> I have found a new dwarf nova in ASAS data.
> It is NSV 601, although the GCVS position and identification for NSV 
> 601 is for another star, 2MASS J01422764-2216294 (J= 14.53; J-K 0.47) 
> and 2UCAC 22828004 (mag. 15.89). It is in the NPM1 catalogue (NPM 
> -22.0272) with V= 15.64 and B-V= 0.68.
>
> The new UG is not in 2MASS or UCAC2 (no outbursts in NSVS either)
>
> It is in the PHL Catalog of faint blue stars at 18.7p. This one IS the 
> star. The PHL position agrees with ASAS. The fact that it is a blue 
> star confirms the identification.
> PHL 3638 is also:
> USNO A-2.0 0675-00607322 = 01 42 25.249 -22 15 57.16 (B= 18.4)
> USNO B-1.0 0677-0026724 = 01 42 25.28 -22 15 58.3 (B= 18.8)
> GSC2.2 S00300011770 = 01 42 25.247 -22 15 56.73 (Bj= 18.48)
>
> It is not in the 2005 version of the Downes catalogue.
>
> The maximum magnitude in the 15-days long outburst recorded by ASAS 
> (the only one to date in November 2001) is V= 12.2.
> It is ASAS 014225-2216.0. See the lightcurve here:
> http://www.astrouw.edu.pl/cgi-asas/asas_lc/014225-2216.0
>
> NSV 601 is 12.2 at maximum (12.2 - <14.4) and it is BV 1187.
>
> So NSV 601 is USNO A-2.0 0675-00607322 and it is a new UG star with an 
> approximate range 12.2 - 18.7.
>
> Which subtype it is and future work is in the hands of you, CV 
> specialists!
> Surely you will look at photographic plates and find more outbursts of 
> this thing.
>
> Best wishes,
> Sebastian.
>