MBCAA Observatory

V603 Aql: a flickering nova remnant

Observed: 2, 23 July 2006

Michel Bonnardeau
3 July 2006
Updated 24, 26 July 2006


Light curves for this cataclysmic variable, the remnant of a 1918 nova, are presented.


V603 Aql is a cataclysmic variable star, that is a binary star with an accreting white dwarf. It blew up as a nova in 1918. It is a bright, well studied star (Warner (1995)):

  • the orbital period is 3.3157 hours;
  • very variable, notably with flickering and superhumps;
  • it is an X-ray source and, according to some authors, the accretion may be magnetically funnelled (an Intermediate Polar type cataclysmic star).
  • V603 Aql is a CBA target for June-July 2006.


    The observations were carried out with a 203mm SC telescope, a Clear filter and a SBIG ST7E camera (KAF401E CCD). 529 images were obtained over 2 observing sessions. Each exposure has a duration of 30s.

    For the photometry, the comparison star is GSC 448-00731 with an assumed unfiltered magnitude of 10.0. The check star is GSC 448-00587 with an observed unfiltered magnitude of 12.388 and a standard deviation of 0.014.

    The resulting light curves:

    Red: V603 Aql, Blue: the check star shifted by -0.2 mag. The error bars are +/- the 1-sigma statistal uncertainties.


    Warner B. (1995) Cataclysmic variable stars Cambridge U.P..

    Technical notes

    Telescope and camera configuration.

    Computer and software configuration.

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