[Aavso-photometry] ASAS182612

Greg Crawford gc at nelsonbay.com
Tue Oct 2 03:03:16 EDT 2007


[Apologies for the previous sending of this message under the wrong subject
heading. When initially posted it was rejected because I was subscribed under
the wrong e-mail address. In my haste to reply, I picked the wrong message from
Jim to use as the foundation for the reply. :-(]

I've been getting some data on ASAS182612 from my location at longitude 152 06
28 East (eastern Australia). However, I can't see any value in my data unless it
is transformed to the standard system. (How else could it be matched to the
overall light curve?) I seem to have worked out how to do that, but I am waiting
for the new observational format for AAVSO submissions. The software I am using
was keyed up, in beta format, to do that; but it seems that the "final" form of
the format has now been ditched and a new one is in the pipeline. Since the
software moves from measurement, to standardization, to format of report, in one
continuous stream of processing, I don't want to take the risk of trying to
extract data from the middle of the process.

The plotting of the curve based on my observations alone doesn't show much, but
then it is a fairly long period after all. I am hoping that, when combined with
data from other longitudes, it will contribute to the overall curve.

Greg Crawford

-----Original Message-----
From: aavso-photometry-bounces at mira.aavso.org
[mailto:aavso-photometry-bounces at mira.aavso.org] On Behalf Of Jim Roe
Sent: Tuesday, 2 October 2007 6:16 AM
To: Aavso-Photometry
Subject: [Aavso-photometry] ASAS182612

I have been trying to monitor ASAS182612 (the only eclipsing Cepheid in our
Galaxy, I'm told) but clouds, equipment, and other things have made it spotty.
Nevertheless, I notice in the recent observation pages of the AAVSO web site
that two other observers have been working it too - GKA and CTX (I'm ROE).

It appears that GKA is observing earlier than I and CTX is observing later.
Maybe that implies GKA is East of me and CTX is West?  (I'm at W90.5, N38.5 -
Eastern Missouri).

The light curve is looking kinda ragged and I'm thinking to sit on it tonight
from roughly 1:00 - 5:00 UT (sky forecast looks promising) and I'm wondering if
anyone else would care to work this one too - especially GKA and CTX?

Jim Roe
Wentzville, Missouri



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