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28 CMa outburst
Posted: Mon Nov 02, 2015 2:56 pm
by Olivier GARDE
According to the alert message of Valerie, here's a spectrum of 28 CMa taken last night in difficult situation :
- Low target in the sky
- some fog during shooting.
Re: 28 CMa outburst
Posted: Tue Nov 03, 2015 8:14 pm
by Paul Luckas
A spectrum taken early this morning local time with the object overhead but under poor seeing.
R ~ 13,000
S/N > 300
I've uploaded it to BeSS.
Paul
- _hd56139_20151103_786_Paul Luckas.png (3.19 KiB) Viewed 9322 times
Re: 28 CMa outburst
Posted: Wed Nov 04, 2015 5:23 pm
by Benjamin Mauclaire
Hello Paul,
Nice spectrum.
Is it a normalized spectrum?
It's important to let continuum's shape natural, it could give informations.
As your wavelength bandwidth is wide enougth, I should put Ha line at a bit blue edge to get He 6678 line.
Cheers,
Benji
Re: 28 CMa outburst
Posted: Thu Nov 05, 2015 1:03 am
by Paul Luckas
Hi Benji,
No continuum removal. Just IR correction.
Cheers,
Paul
Re: 28 CMa outburst
Posted: Sun Nov 08, 2015 3:45 am
by Ken Harrison
Paul,
Well done!
Good spectrum.
Re: 28 CMa outburst
Posted: Tue Nov 10, 2015 2:25 am
by Paul Luckas
Another Lhires spectrum submitted to BeSS this morning. R ~ 14,000 @ 6532Å, S/N > 300.
The attached plot shows a comparison with last week's upload.
Paul
- 28CMa.png (4.47 KiB) Viewed 9202 times
Re: 28 CMa outburst
Posted: Fri Jan 01, 2016 11:24 am
by Thierry Lemoult
Hello
I took a new spectrum of 28 Cma last night and the night before. The Ha emission continusly increase. Relative continuous: more than 5 unit now.
LHIRES 2400T, Telescope Newton 200mm. R=17000. From Abu dhabi, lat=25°N. This star is high is the sky. Alt=35°
- cmp-lemoult-DongLi.png (5.42 KiB) Viewed 9089 times
Re: 28 CMa outburst
Posted: Sun Mar 20, 2016 5:31 pm
by Olivier GARDE
28 Cma taken the 18th March with eShel spectrograph and comparaison from my last spectrum taken in november 2015 (with heliocentric velocity correction)
H Alpha
H Beta
H Gamma
