Re: Nova Sgr = PNV J18365700-2855420
Posted: Fri May 08, 2015 9:14 pm
Hi:
The Nova Sgr#2 2015 in the last night.
J.Guarro.
The Nova Sgr#2 2015 in the last night.
J.Guarro.
Spectra flux callibrated.
spectro-aras.com
ARAS Spectroscopy Forum
http://www.spectro-aras.com/forum/
Nova Sgr = PNV J18365700-2855420
Page 4 of 5
Re: Nova Sgr = PNV J18365700-2855420
Posted: Thu May 14, 2015 12:41 pm
My first spectra of this nova. Taken with a LISA on a C11 scope. It is very bright still with a V mag of 5.1
Spectra flux callibrated.
Spectra flux callibrated.
Re: Nova Sgr = PNV J18365700-2855420
Posted: Sat May 16, 2015 3:13 pm
Hello:
Small variations in Nova Sgr 2015 # 2.
J.Guarro
Small variations in Nova Sgr 2015 # 2.
J.Guarro
Re: Nova Sgr = PNV J18365700-2855420
Posted: Sun May 17, 2015 12:39 am
The new broad feature at ~4650A is also seen very clearly in a Star Analyser spectrum take by Rob Kauffman 14th May
https://groups.yahoo.com/neo/groups/sta ... sages/3774
Does anyone know what is causing it?
Robin
https://groups.yahoo.com/neo/groups/sta ... sages/3774
Does anyone know what is causing it?
Robin
Re: Nova Sgr = PNV J18365700-2855420
Posted: Sun May 17, 2015 3:50 pm
Hi Robin,
this looks similar to NovaDel2013, where about a month after peak magnitude this line appeared also, as can be seen from this animation, basaed on spectra from the ARAS database http://www.astrosurf.com/aras/Aras_Data ... l-2013.htm:
Notice that the flux scale is logarithmic, quite useful for the spectra with large variation in flux. Robs asssignment to the NIII line at 4638A seems reasonable, maybe Francois can tell more about it.
Regards, Martin
this looks similar to NovaDel2013, where about a month after peak magnitude this line appeared also, as can be seen from this animation, basaed on spectra from the ARAS database http://www.astrosurf.com/aras/Aras_Data ... l-2013.htm:
- animation of flux calibrated spectra of NovaDel2103
- @NovaDel_long2_.gif (576.22 KiB) Viewed 10016 times
Regards, Martin
Re: Nova Sgr = PNV J18365700-2855420
Posted: Sun May 17, 2015 5:59 pm
-
This is the 'N flash'. A blend of NIII/CIII from 4640 to 4660
Ionization is increasing as the ejecta becomes thin for UV.
In the red edge of the blend will appears He II 4686
See http://www.astrosurf.com/aras/novae/Nova2013Del-2.html
Spectrum of 05-09-2013
This blend also appears in C.V. in outburst.
François
That's rightRobs asssignment to the NIII line at 4638A seems reasonable, maybe Francois can tell more about it.
This is the 'N flash'. A blend of NIII/CIII from 4640 to 4660
Ionization is increasing as the ejecta becomes thin for UV.
In the red edge of the blend will appears He II 4686
See http://www.astrosurf.com/aras/novae/Nova2013Del-2.html
Spectrum of 05-09-2013
This blend also appears in C.V. in outburst.
François
Re: Nova Sgr = PNV J18365700-2855420
Posted: Mon May 18, 2015 11:35 pm
An eShel spectrum (R=11000) on a 8-inch Newton telescope (10 x 3 min exposure) the 18.121 / 05 / 2015:
and some details:
Christian B
and some details:
Christian B
Re: Nova Sgr = PNV J18365700-2855420
Posted: Thu Jun 04, 2015 11:58 am
An eshel spectrum taken last night.
4 exposures of 10 minutes each.
detail on order 34 (H alpha)
detail on order 46 (H Beta)
4 exposures of 10 minutes each.
detail on order 34 (H alpha)
detail on order 46 (H Beta)
Re: Nova Sgr = PNV J18365700-2855420
Posted: Sat Jun 06, 2015 10:26 am
An ancient unpublihed VHIRES-MO spectrum of nova Sgr 2015 #2 (24.06 / 04 / 2015):
Christian
Christian
Re: Nova Sgr = PNV J18365700-2855420
Posted: Fri Jun 26, 2015 1:19 am
An eShel spectrum taken the 17.9/09/2015 (V=9):
Detail of Halpha region for the same date:
Note evolution of Halpha profile at high resolution on a eShel spectrum taken the 23.9/06/2015:
Alpy600 spectrum taken the 24.9/06/2015 (V=11 -> very fast decrease of the brightness -> cloud dust around the nova):
Christian
Detail of Halpha region for the same date:
Note evolution of Halpha profile at high resolution on a eShel spectrum taken the 23.9/06/2015:
Alpy600 spectrum taken the 24.9/06/2015 (V=11 -> very fast decrease of the brightness -> cloud dust around the nova):
Christian