[Aavso-photometry] TT Ari Comp Stars

[arne]

Aaron Price wrote:

>I found a few CCD comparison stars for TT Ari:
>
>This one is from ASAS-3:
>RA: 02:07:14.2   Dec: 15:19:48.3    V:11.829    Verr: 0.039   
>
>Arne's .dat file is faint. These are the brightest stars I could fine.
>Try to stay within 3 mags of TT Ari. So use the 14.6 star first and
>switch to 15.2 if TT Ari gets fainter than  12.2.
>
>RA: 02 06 49.0   Decl.: +15 17 00.1   V: 14.624   Verr: 0.017   B:
>15.300   Berr: 0.040
>RA: 02 06 49.8   Decl.: +15 20 05.5   V: 15.210   Verr: 0.042   B:
>16.039   Berr: 0.065
>
>I'm doing this from my laptop in a hotel room, without my usual tools.
>So I'd appreciate it if someone else would double check these values.
>
>  
>
Looking at my exposure logs, I took both long and short exposures of
this field, so should have brighter stars calibrated than V=14.  However,
these frames were also taken in 1993 using the 6.7x6.7arcmin FOV CCD,
so only nearby stars would be recorded.  I'll look at them sometime in
the next day or so.
Arne