[Aavso-photometry] Question on ASAS182612 Campaign

[arne]

arne wrote:
> Greg Crawford wrote:
> 
>>Alert notice 351 refers to the ASAS182612 Campaign and makes the following
>>comment on comparison stars:
>>
>>
>>
>>>If you are going to use a single comparison star along with a check star, we
>>>recommend using:
>>>ID       RA(J2000) DEC           V     B-V    V-Rc   Rc-Ic  V-Ic
>>>comp  18:26:09.44 +12:17:37.2  11.914  0.748  0.444  0.432  0.876 check
>>>18:26:23.68 +12:15:47.2  10.892  0.665  0.383  0.358  0.738
>>
>>
>>The software I use (MPO Canopus) can use up to 5 comparison stars. I have vague
>>recollections of a recommendation on this list to use only one comparison star
>>so that corrections can be made more easily. Is it recommended in this campaign
>>that only *one* comparison star be used, (with check star, of course), for
>>reduced measurements?
>>
> 
> If you are using the BVRI photometry from VSP for this field, you
> are given "permission" to use ensemble techniques for this campaign.
> Likewise, for GJ436, you can use ensemble techniques.  These fields
> have high-quality SRO calibration, so all stars are on the same
> system. Be sure to include a comment indicating ensemble.  For all
> other fields, wait until we get our new file format published
> and available from the software vendors.

One additional caveat: you have to use a supported file format in
order to upload through WebObs, and I'm not sure the ensemble formats
are accepted.  If that is the case, then just use the single comp/check
format, and don't ask Kate to create a special script to cover your
ensemble submission.
Arne