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[vsnet-newvar 1792] (fwd) another outburst of ASAS 000155-6707.7 = 1RXSJ000154.2-670749 = EC 23593-6724

Date: Wed, 15 Jan 2003 12:13:15 +1100
From: Vello Tabur <vello@pcug.org.au>
Subject: Re: [vsnet-newvar 1777] (fwd) Sequence for ASAS 000155-6707.7 = 
 1RXSJ000154.2-670749 = EC 23593-6724

Hi Dr. Kato,

John Greaves suggested that I examine my image archive to see if I could
detect this star when at maximum. Although it's a bit faint for my
imaging setup for decent photometry, I did detect it on several images
and could confirm the ASAS observations. Additionally, I have found
another maximum. Here is a copy of what I sent to John. I hope this may
be of some use to you.


I've reviewed my images with mixed success. My older images were taken
with a 135mm lens, and the slightly longer focal
length and larger aperture does show the star on some images.
Unfortunately, the images taken with a 100mm lens (a large
proportion of images) also show it occasionally, but much closer to the
noise threshold. I doubt that the derived mags are
of sufficient quality... but here goes. Mags are CCD-R.

2000 01 04 000756.st6    2451548.047    12.5    Image is blurred, but
shows the object.
2000 12 23 005440.st6    2451902.079    12.6
2000 12 23 005538.st6    2451902.080    12.4
2001 07 20 001902.st6    2452111.097    12.9
2002 04 03 191145.st6    2452367.883    11.4    Possible cosmic ray hit
2002 07 10  223857.st6   2452466.028    12.3
2002 07 10  223956.st6   2452466.028    12.0

The two images on 2451902 gel with the ASAS peak of 2451890.
The one image on 2452111 is a few days before the second ASAS peak on
2452120.
The two images on 2452466 suggest another peak around this time.

Best Regards,

--
Vello Tabur
Comet Hunting Techniques    http://vsnet.tip.net.au/~vello
R&D, SearchSoftwareAmerica  http://vsnet.searchsoftware.com

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