[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Data Taking Rate
- To: tass@wwa.com
- Subject: Re: Data Taking Rate
- From: aah@nofs.navy.mil
- Date: Sat, 02 May 98 15:23:28 -0700
- Old-Return-Path: <aah@nofs.navy.mil>
- Resent-Date: Sat, 2 May 1998 18:33:04 -0400
- Resent-From: tass@wwa.com
- Resent-Message-ID: <"N_HCwD.A.BXG.A65S1"@kani.wwa.com>
- Resent-Sender: tass-request@wwa.com
Chris wrote about methods to save non-photometric nights. The way I was
expecting the project to go was as follows:
(1) astrometry from all nights are combined for mean positions.
Clouds directly impact the photometry, but only reduce the
signal in the coordinate calculation.
(2) Photometric nights are used to determine mean magnitudes for
all objects.
(3) These same photometric nights are used to find variables based
on their scatter.
(4) Differential photometry with respect to a nearby subset of stars
with known mean magnitudes is used to determine the magnitudes
for the variable stars. This technique works equally well for
photometric and non-photometric nights.
Arne