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[vsnet-alert 7093] Possible Nova in Oph Spectrophotometry (HadV105)
- Date: Sat, 26 Jan 2002 10:49:57 EST
- To: tkato@kusastro.kyoto-u.ac.jp, vsnet-alert@kusastro.kyoto-u.ac.jp, vsnet-campaign-nova@ooruri.kusastro.kyoto-u.ac.jp, vsnet-discovery-nova@ooruri.kusastro.kyoto-u.ac.jp
- From: DWest61506@aol.com
- Subject: [vsnet-alert 7093] Possible Nova in Oph Spectrophotometry (HadV105)
- Cc: cbat@cfa.harvard.edu, dgreen@cfa.harvard.edu, aavso@aavso.org
- Delivered-To: vsnet-alert@kusastro.kyoto-u.ac.jp
- Sender: owner-vsnet-alert@ooruri.kusastro.kyoto-u.ac.jp
On 1/26/02 12:52 UT three low-resolution spectra of the potential nova in
Oph were taken with a nonobjective slitless spectrometer. Thin clouds were
present and the sky was becoming light due to the approaching dawn. The sky
conditions and the relative faintness of the object (V=9.2) resulted in a low
signal to noise ratio of ~3 for each spectrum. The spectrometer consists of a
transmission grating, an 0.2 m SCT, and a SBIG ST-8 CCD camera. The
wavelength is calibrated relative to A type stars. The standard deviation of
wavelength measurement is approximately 25 Angstrom.
All three spectra contained an emission peak at an average wavelength of 6598
Angstrom. This peak is within two standard deviations of the H alpha peak at
6562.81 Angstrom. From this measurement, I conclude that the new object in
Oph does exhibit H alpha emission.
Regards,
Doug West
Mulvane, KS, USA
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