[vsnet-alert 3489] Re: GM Sgr = SAX J1819.3-2525? outburst

[AYANI Kazuya <ayani@bao.go.jp>]

Dear colleagues,

We obtained the optical spectra of GM Sgr using Bisei Astronomical
Observatory 1.01-m telescope.

The following report has posted to CBAT.

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K. Ayani, Bisei Astronomical Observatory, Japan, and T. C. Peiris,
Arthur C. Clarke Inst. for Modern Technologies, Sri Lanka, report the
following observation of GM Sgr.

The optical spectra (range 390-760 nm; resolution 0.7nm at H alpha) of
GM Sgr were obtained with Bisei Astronomical Observatory 1.01-m
telescope on Sept. 15.50-15.52 UT, when the X-ray flux of SAX
J1819.3-2525 was rapidly increasing (IAUC 7253).  Broad emission lines
of Balmer series and of He II 468nm are prominent.  H-alpha emission
line has a FWHM of about 2700 km/s and an equivalent width of 8nm.  He
II 541nm emission line is also present.  These facts indicate that GM
Sgr is the opitcal counterpart of SAX J1819.3-2525.
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Best regards,
Kazuya Ayani

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