[Aavso-photometry] GJ436b comp stars...constant over time?

[Arne Henden]

Not quite sure what you mean, Pedro.  The VSP marked
comparison stars have BVRI photometry, as given in the
accompanying photometry table.
Arne

On Fri, Apr 4, 2008 at 2:00 PM, Pedro Pastor <pps at dlsi.ua.es> wrote:
> No Tom, I haven't found any noticeable variation for the 106 and 107 stars
>  during the night-session.
>
>  On the other hand, I'm using the R filter. Could anybody provide me with the
>  respective R magnitudes for some comparation stars?
>
>  Thank you very much.
>
>  Pedro
>
>  -----Mensaje original-----
>  De: aavso-photometry-bounces at mira.aavso.org
>  [mailto:aavso-photometry-bounces at mira.aavso.org] En nombre de Tom Krajci
>  Enviado el: viernes, 04 de abril de 2008 15:52
>  Para: aavso-photometry at mira.aavso.org
>  Asunto: [Aavso-photometry] GJ436b comp stars...constant over time?
>
>
>
>  A bunch of folks have been working on GJ436b for some time.  Two comp stars
>  are most often used:  HIP 57103 (3 - 4 arcminutes NE) and GSC
>  1984-1884 (3 - 4 arcmin N).
>
>  Have these comps shown any variability over time?
>
>  Thanks in advance.
>
>  -------------------------------------------
>  Tom Krajci
>  Cloudcroft, New Mexico
>  http://picasaweb.google.com/tom.krajci
>
>  http://overton2.tamu.edu/aset/krajci/
>
>  Center for Backyard Astrophysics (CBA)
>  http://cbastro.org/ CBA New Mexico
>
>  American Association of Variable Star
>  Observers (AAVSO): KTC http://www.aavso.org/
>  -------------------------------------------
>
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