Hi CBAers,Yesterday in America, the CBO dominated the news. Today it seems to be the CBA - because one of our all-time favorite stars burst into its first known eruption. Bootis is decently available in the sky (1507+52)...so get thee to a telescope.
At 12th magnitude you can even use a filter (V is best). But as usual, it's the time series we're most interested in, so a nice long time series in unfiltered light is just perfect. This could be a short outburst, so speed might be essential!
joe -------- Forwarded Message -------- Subject: [vsnet-alert 20780] Re: OV Boo outburst Date: Wed, 15 Mar 2017 03:42:10 +0900 From: Keisuke Isogai <isogai@xxxxxxxxxxxxxxxxxxxxxx>To: vsnet-alert@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx <vsnet-alert@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx>, vsnet-outburst@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx <vsnet-outburst@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx>, baavss-alert-subscribe@xxxxxxxxxxxxxxx, cvnet-outburst-subscribe@xxxxxxxxxxxxxxx
This is an additional information.
OV Boo is also known as SDSS J1507+52. In order to explain why the
orbital period
is below the period minimum although the object has WZ Sge-like properties, Patterson et al. (2008) proposed that the secondary of OV Boo might be aPopulation II (metal-poor) star. (Because Pop. II star is smaller than normal stars.) However, the spectroscopic study is insufficient, and the population has not
been confrimed.If this outburst is "metal-poor outburst", the behavior might be different from
the ordinary DNe outburst. On 2017年03月15日 02:51, Keisuke Isogai wrote:
OV Boo has ultra-short period of 0.046 d, and the period is below the period minimum. By the spectroscopic study, Patterson et al. (2008) suggested that OV Boo is a member of WZ Sge stars, but the object had shown no outbursts. This outburst is very likely to be a WZ Sge-like superoutburst. Thus time-series observations are strongly encouraged. On 2017年03月15日 01:42, Seiichi Yoshida wrote:Dear colleagues, I am Seiichi Yoshida working on the MISAO Project. Masaru Mukai, Kagoshima, Japan, reported that OV Boo (R.A. 15 07 22.35, Decl. +52 30 39.8) is bright as 11.4 mag on Mar. 14.63 (UT), using Nikon 105-mm lens + CCD (STL6303E) + IR-cut filter. The VSX data shows it is a CV+EA+ZZ/GWLIB type with a range of 18.0-20.6 mag. Best regards, -- Seiichi Yoshida comet@xxxxxxxxxx http://www.aerith.net/
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