[vsnet-campaign-xray 64] Re: SAX J1711.6-3808 optical observation

[Hitoshi YAMAOKA <yamaoka@rc.kyushu-u.ac.jp>]

Dear Colleagues,

>   The Kyoto team (Uemura et al.) imaged the field of SAX
>J1711.6-3808 (the new X-ray transient).  Quick-look analysis of
>individual images has not revealed a bright, promising optical
>counterpart.  The data are being intensively and deeply analyzed by
>Yamaoka-san and Uemura-san. 

  The full reduction of these images (no filter, total exposure 510
sec, limiting mag about 16.5) reveals no promising optical
counterpart, though there are two stars somewhat brighter than DSS R
image. 

  One is an USNO_A2.0 star at R.A. = 17:11:36.40, Decl. = -38:08:16.3
(2000.0), whose rmag = 15.4 bmag = 18.9.  It appears on Kyoto image to
be 14.8:C.

  And, another one is located at R. A. = 17h11m39s.15, Decl. =
-38o07'52".7 (2000.0), which is not cataloged in USNO_A2.0, but can be
seen on DSS2 R and Bj image.  The rough magnitude estimates on DSS are
r = 17.6, b = 19.5.  It appears on Kyoto image to be 16.0:C.   

  These are possibly res stars (variables), but further observation
should be needed for the determination.  

Sincerely Yours,
Hitoshi Yamaoka, Kyushu Univ., Japan
yamaoka@rc.kyushu-u.ac.jp

VSNET Home Page

---

vsnet-adm@kusastro.kyoto-u.ac.jp

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp