Hi all! Yesterday the following Nova Alert came from our french colleagues: http://tech.groups.yahoo.com/group/spectro-l/message/14168
Knud Strandbeck (team 2 of the present Teide campaign) spontaneously stopped our ongoing WR programm and took a 600s echelle spectrum of this 11mag beast. Attached are the spectra independently quick-reduced by Martin Dubs and Lothar Schanne (ISIS and MIDAS, respectively). It seems that various emission lines in Halpha, He and Carbon are visible. The most prominent is Halpha with an 82km/s width. We now discuss with our Montreal PIs how to proceed. Next night we will take a 1800s spectrum and see what we can do.
Yes, it is a dwarf nova.
This is an exciting issue...........
Do you have a link?
PNV J19150199+0719471R.A. 19:15:02.047 decl. +07:19:46.78 (J 2000.0) Robin
...this message thread is headed PNV J06270375+3952504...
(I am on it currently using my new Alpy low resolution spectrograph)
Ah, I see! Yes, I annonced the wrong number in the header. Well, just a number...
here is a comparison of last night spectrum with the night before:
Notice that in the last spectrum the calibration lines have disappeared. The first spectrum of the nova had a readout error, so it was discarded. The remaining 5 images were combined to 5x600 sec exposure, which explains the slightly better S/N compared with the first spectrum. The differences in H-alpha are small, may well be noise. A time series of single exposures of 600 sec each showed little variation, it looks that the S/N is not quite sufficient for such an analysis.
Maybe with a separate campaign some trends of spectral changes could be established, but in a short experiment it will be difficult to find a periodic change.
is anything known about the period of the assumed binary or the spectral class and luminosity of the secondary for this object? Is something very similar to WZ Sge expected? I am not familiar with this type of dwarf novae.
Spectra are uploaded to the server as usual.
Mitglieder in diesem Forum: 0 Mitglieder und 0 Gäste