[vsnet-campaign 393] RE: 1H 1933+510

[cob585f <cob585f@mail.smsu.edu>]

>===== Original Message From Taichi Kato <tkato@kusastro.kyoto-u.ac.jp> =====
>1H 1933+510
>
>   Forwarded message from vsnet-obs 28746.  The "outburst" is apparently
>confirmed.
>
>From: "Steve O'Connor" <ocn@total.net>
>Date: Mon, 24 Jul 2000 14:55:56 -0400
>
>Can anyone confirm that the object 1H 1933+510 is located at 19h 34m 36.1s
>and +51deg 07' 39" ? This is just a few arc seconds West of the GSC star
>3568-115. I have the following observation:
>
>
>1H1933+510    20000724.319    :15.8V   OCN
>
>
>regards,
>
>Steve O'Connor
1H 1933+510 is 12.0 arcsec W and 4.3 arcsec N of the brighter companion
star I'm using as a comparison.  I'm not certain if the companion star is
GSC 3568-115, but I believe it is.  (I got the W and N offsets directly
from my CCD images.)

By the end of my day, I should be ready to post a table of differential
photometry of 1H 1933+510 vs. its brighter companion for all the nights
I ever observed it, beginning in June 1999.  It's roughly two magnitudes
fainter than its companion when in outburt, and roughly five magnitudes
fainter than its companion when in its low state.

Catching up on these reductions, I have discovered still another outburst
of the star on June 8, 2000.  This was shortly before the misidentification
on my finding chart was discovered; so, just like the November 13 1999
outburst, I had failed to notice it at the time because I was looking at
the wrong star.  The finding chart in Downes & Shara is correct and also
shows the star in a state between full outburst the low state I've mostly
found it in.

Thanks everyone for following up on this star.  As always seems to happen
when I observe CV's, I embarrass myself in some way.  I should have spotted
the earlier outbursts and announced them sooner!  The error on the finder
chart I was using was an error of my own creation.

                                                        -- Claia Bryja

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