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[vsnet-alert 5450] [Fwd: [CCD-astrometry-photometry] Questions On Variable Star]

Dear Colleagues,
ss the moderator of the CCD-astrometry-photometry@egroups mailing list, I forward this
note by Robert Koff.

Regards,
Gianluca Masi

-- 
***********************************************************************
* Gianluca Masi                           "Two things fill the soul   *
* Via Madonna de Loco, 47               with awe and reverence [...]: *
* 03023 Ceccano (FR)                     the starry sky above me and  *
* ITALY                                    the moral law within me"   *
* e-mail: gianmasi@fr.flashnet.it                                     *
* web:  http://vsnet.eurolink.it/comets/                  I. Kant       *
* Minor Planet Center Obs. Code: 470 - Ceccano                        *
* Center for Backyard Astrophysics - Italy                            *
* VSNET Collaboration Team member                                     *
* CCD-astrometry-photometry@egroup mailing-list moderator             *
***********************************************************************

Hello, all,

While imaging an asteroid for a light-curve determination, I noticed that
one of my comparison stars had taken a sudden drop in magnitude.  I have now
observed this star for four nights, and have seen the event a second time.
While a period solution will require more observing, (the likely periods are
such that they repeat at near 24-hour intervals), I need advice on how to
proceed, as this is my first variable star observation.

The details and a tentative light curve are on my web page at
http://home.att.net/~Bob.Koff/GSC2315/GSC_4686_2315.htm

I am thinking that this star may be an eclipsing binary, Algol type.  So my
first question would be, am I on the right track?

I have tried to find a reference to this star as a variable star, and so far
have found none.  This may indicate that it is a previously unknown
variable, or it may indicate that I don't know how to search  :-)  .  Can
someone refer me to a web site or other source of variable star data which I
could search using the GSC or USNO designation for this star?

Next, if this is a new variable, I am unsure as to how to report this
object.  Perhaps the VSNET or AAVSO members of the group could point me in
the right direction, as to where to send the data and in what format.  I've
surfed the various web sites, but it's not clear to me how to proceed,
particularly with voluminous CCD data.  As I mentioned, my current results
are preliminary.  Should I wait to report until I have a firmer grasp of the
situation?

Thank you all very much.  I hope the feedback generated by my inquiry will
be helpful to others who find themselves, purposely or accidentally,
observing variable stars.

Happy Holidays to All,

Bob Koff


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