[vsnet-obs 39986] V4641 Sgr observations (Alexandre Amorim)

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

V4641 Sgr observations (Alexandre Amorim)

      Well, isn't easy observe V4641 Sgr using a 143mm reflector and strong
moonlight interference, but my MALE is ~ 11.8-magnitude (GSC Catalogue). Some
notes:

1) I'm using this comparison stars:

(a)  E_GSC 0684804244  m:10.83 (= TYC6848-04244-1 Vt:11.05 )

(b)  E_GSC 0684803606  m:10.94

(c)  E_GSC 0684803438  m:11.71 and

(d)  E_GSC 0684803245  m:11.87


2) In May 24 , all this stars was detected - comp (d) was the limit.

3) In May 25 there was a unusual thing: comp (a) and (c) was observed, but no
(b). That's my report:

SGRV4641 20020525.1597 11.7 AAX G M
SGRV4641 20020525.1632 11.7 AAX G M
SGRV4641 20020525.1667 11.8: AAX G M
SGRV4641 20020525.1701 11.6 AAX G M
SGRV4641 20020525.1736 11.5 AAX G M
SGRV4641 20020525.1771 11.5 AAX G M
SGRV4641 20020525.1806 11.4 AAX G M
SGRV4641 20020525.1840 11.4 AAX G M
SGRV4641 20020525.1875 11.4 AAX G M
SGRV4641 20020525.1910 11.4 AAX G M
SGRV4641 20020525.1944 11.5 AAX G M
SGRV4641 20020525.1979 11.3: AAX G M
SGRV4641 20020525.2014 11.3 AAX G M

Notes: G - GSC Catalogue from Guide 7.0
       M - moonlight interference

4) Now, May 26 03:00 UT, my MALE is ~11.0 and V4641 Sgr wasn't detected. I wait
for any outburst like 1999...

    If you want, this message may be forward to vsnet mailing-list.

    With regards,

    Alexandre Amorim (AAX)

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