Jump to content

Banner.jpg.b83b14cd4142fe10848741bb2a14c66b.jpg

V0973 Cep HADS light curve


Recommended Posts

Below is my attempt last night at V0973 Cep. The range is 12.2 - 12.6 V (AVVSO ) with a period of 0.08063046 d  (116.10786 minutes). In total 872 subs, at 15s each over a period of just over 4 hours.

327399828_V0973Cep(JD).png.65a661a073303e057534a7a1d62c45ec.png

I have estimated the period at 0.08056 (116.005 minutes), so close to the aavso source. It is hard to conclude on max/min magnitude, but I estimate from the shape of the plot  12.38 - 12.79 T-G.

A plotting of the magnitude vs phase is below.

513252570_V0973Cep(Phase).png.59b536b18c2bbe93dfc86fdc6323c51d.png

Looking at other examples on AVVSO the maxima at -0.5 tends to be slightly higher than the one at 0.5, and the mimima at 0 is higher than at 1. So the shape is there, but to be honest I am a little disappointed with the results.  There is quite a bit of noise and is not as smooth as I would have hoped for.

Scrolling through the subs on AstroImageJ at speed there is the tell tail pattern of very thin clouds moving over at certain times which is what I feared when I went out to shutdown from looking at the clarity of the moon. There are of course the obligatory contrails and satellite trails in the subs too. 😀 I suspect the main issue is very thin clouds (despite it looking beautifully clear during the evening), but there is maybe something else causing a problem too that I need to think about more. 

It is a nicely positioned target with a good magnitude difference to detect so well worth a try -  with the added bonus of being able to get a complete phase curve in one evening (weather permitting).

  • Like 1
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.