[Aavso-photometry] 0020+11 ASAS002511

[Arne Henden]

interesting comparison.  My results from the file
ftp://ftp.nofs.navy.mil/pub/outgoing/aah/sequence/j0025.dat
from last night, using UCAC2, yield
00:25:11.09  +12:17:12.3
with errors under 100mas, so quite in agreement with David's.
USNO-B, especially if you use the proper motion fields, is a good
alternative to UCAC for those fields not yet released or where
the star density is low.
Arne

David Boyd wrote:
> Dear colleagues,
> 
> I obtained 3.8 hrs of V-band photometry on this object last night from JD3264.40
> to 3264.56. It shows a single sharp peak per cycle with an amplitude of 0.25 mag
> and a period of 0.0568+/-0.0004d using Peranso/ANOVA. I will reanalyse and
> upload the data when field calibration is available.
> 
> Astrometry on 5 good images using USNO-B1.0 gives:
> 
> ASAS0025 C2004 09 15.98317 00 25 11.09 +12 17 12.5 11.4 V J90
> ASAS0025 C2004 09 15.98372 00 25 11.10 +12 17 12.5 11.3 V J90
> ASAS0025 C2004 09 15.98590 00 25 11.10 +12 17 12.5 11.3 V J90
> ASAS0025 C2004 09 15.98646 00 25 11.10 +12 17 12.6 11.3 V J90
> ASAS0025 C2004 09 15.98919 00 25 11.09 +12 17 12.6 11.3 V J90
> 
> with an average of 28 reference stars fitted, FWHM 4.5" and maximum errors in RA
> +/-0.28",
> DEC +/-0.25".
> 
> Regards,
> David
> 
> ----- Original Message ----- 
> From: "Aaron Price" <aaronp at onceler.org>
> To: <aavso-photometry at aavso.org>
> Sent: Thursday, September 16, 2004 12:36 AM
> Subject: [Aavso-photometry] 0020+11 ASAS002511
> 
> 
> 
>>
>> We've added the new object to our validation file so you can
>>upload observations as 0020+11 or ASAS002511. Arne will attempt to get a
>>night's photometry on the field tonight. If successfull I'll post a
>>prelim sequence to this discussion group tomorrow. In the meantime please
>>image away and go as long as possible to keep the observing gaps small!
>>
>>
>>Aaron
>>
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>