Friday, November 27, 2009

NOVA ERIDANI 2009 - Update

According to the Cbets 2053 & 2055 the transient in Eridanus has been spectroscopically confirmed as a nova.

Spectra obtained on Nov. 26 by H. Maehara (Kyoto University) and by M. Fujii (Okayama) shows that the object seems likely to be an He/N-class nova

Moreover another spectrum obtained by NASA researchers using the Aerospace Near-Infrared Imaging Spectrograph on the 3-m Shane reflector of Lick Observatory shows very strong, broad emission lines and confirm this object as a nova.

In the meantime prediscovery measurements of Nova Eridani 2009 have been reported on VSNET mailing list by "Pi of the Sky” team.

According to their measurement the nova reached the magnitude 5.60 (R-filter) on Nov. 15:

20091113.301 7.10 R "Pi of the Sky"
20091114.304 5.71 R "Pi of the Sky"
20091115.308 5.60 R "Pi of the Sky"
20091116.302 5.92 R "Pi of the Sky"
20091117.297 6.09 R "Pi of the Sky"

Their light curve and a nice animation showing the first days after the outburst:

http://grb.fuw.edu.pl/pi/var/catac/nova_eri.htm


ASAS-3 system (Pojmanski 2002, Acta. Astron. 52, 397) also detected this object at the following V magnitudes:

Nov. 10.236 UT, [14.0:
Nov. 19.241, 7.34;
Nov. 22.179, 7.98;
Nov. 24.269, 8.12.

by Ernesto Guido

3 comments:

Roy Bishop (Canada, N.S.) said...

A measurement of the Nova: I took a photo (Canon XTi, 17 mm focal length) of the Orion region on Nov. 18.16 UT and have just analysed the image (Nov 29). The Nova was recorded, and by comparing it to the brightness of several nearby stars of comparable brightness in the photo, I put the Nova at mag 6.9 +/– 0.1 at that time.
Roy Bishop (Canada, Nova Scotia, Avonport, Maktomkus Observatory)

Team said...

Dear Roy

Thanks for sharing your results!!

Ciao,
Ernesto

Kevin Heider said...

At 2009-11-30 16:13 UT, I took a 2 minute photo of Nova Eridani 2009 with a 14" telescope even though I was fighting the 96% full moon.

See Wikipedia for image and more details:http://commons.wikimedia.org/wiki/File:Nova-Eridani-2009-LB4.jpg

-- Kevin Heider