American Association of Variable Star Observers (AAVSO)
Sat, 06/17/2023 - 19:32

Hi folks.  In the AAVSO webinar last Saturday a question was asked about which CV’s would be good choices for DSLR work.  Shawn Dvorak and I had a couple of suggestions.  These choices were based on a couple of assumptions:

  • A DSLR is often mated to telescopes up to about 12inch aperture and so brighter is better. 
  • DSLR photometry is best suited to CV’s where we are looking primarily for the periodic signals of the systems rather than magnitudes that match a standard bandpass. 

Here are the systems we suggested last week.

UX UMa: It ranges from about 12.5 to 14th mag as it goes through beautiful eclipses every ~4.7 hours.  Data on this system allows tracking the change in the 4.7 hour orbital period.  There are also other periods on the order of several days layered in the data so light curves over many nights are very helpful.

V1084 Her: Typically between 12th and 13th magnitude.  No eclipses but this one moves around a lot every night.  It also moves around over longer time scales so observing it on multiple nights yields important data.

Clearest skies,