[Aavso-photometry] Re: CCD Views Special Edition: Exoplanet Transit Campaign

[Aaron Price]

 Thanks for the report. IL Aqr is a high proper motion object, so its
location in the various catalogs differs. USNOA2 has it as two
different stars actually.  If someone could post accurate astrometry
for its current location that would be useful.

 I pulled the ASAS-3 data on IL Aqr and put it in the AAVSO database.
You can see it in the light curve generator or via the link on the IL
Aqr web page (http://www.aavso.org/news/ilaqr.shtml). It seems to  be
pretty stable for the most part, but went  through an interesting dip
of around half a magnitude about 500 days ago.

Aaron



On Sat, 9 Oct 2004 10:58:56 -0500, Michael Koppelman
<lolife at bitstream.net> wrote:
> A few notes on this star.
> 
> The coordinates on the chart seem a bit off to me. This may be an error
> propagated from the GCVS? I don't know. The actual coordinates,
> according to my astrometry, are:
> 
> 22:53:17.1 -14:15:52.72
> 
> This is +/- about 0.5".
> 
> I always forget which one (RA or Dec) is supposed to have the extra
> digit. I'm sure Arne will correct me!
> 
> This was completely constant in my 4 hour run last night. A weighted
> average of all 4 hours of data gives:
> 
> V = 10.222 +/- 0.001
> 
> I used all 3 stars from the E chart in an ensemble solution and the
> zeropoint error was 0.01 or less. I guess this means it would be more
> accurate to say it was at V = 10.22 +/- 0.01. It appears that the
> magnitude for the 11.9 star includes the companion 17" away at position
> angle 329.2. If the sequence is from ASAS this makes sense.
> 
> I have submitted my data to the AAVSO.
> 
> Cheers,
> Michael Koppelman
> http://www.lolife.com/astronomy/
> 
> 
> On Oct 7, 2004, at 11:09 AM, aavso at aavso.org wrote:
> 
> > -----------------------------------------------------------------------
> > ---
> >             THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
> >                  25 Birch Street, Cambridge, MA 02138 USA
> >                  Tel. 617-354-0484       Fax 617-354-0665
> >                           http://www.aavso.org
> > -----------------------------------------------------------------------
> > ---
> >
> >                              C C D   V I E W S   #326
> >                             --------------------------
> >                                  October 7, 2004
> >
> >  !! THIS IS A SPECIAL EDITION OF CCD VIEWS !!
> >
> > Table of Contents
> >  -----------------
> >  1. Exoplanet Transit Campaign for IL Aqr/GJ 867
> >
> > -----------------------------------------------------------------------
> > ---
> >  1. EXOPLANET TRANSIT CAMPAIGN FOR IL AQR/GJ 867
> >
> >  The AAVSO has teamed up with transitsearch.org to coordinate an
> > observing
> > campaign for IL Aqr, a.k.a GJ 867 in the transit search community. Dr.
> > Greg Laughlin, University of California at Santa Cruz, is looking for
> > observations during an upcoming transit opportunity.
> >  IL Aqr is located at R.A.: 22:53:17  Decl.: -14:15:48
> >
> 
> 
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-- 
Aaron