An update (click to enlarge):
Bright nova in Centaurus
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Re: Bright nova in Centaurus
Impressive Paul.
I only have 2 spectra taken due to crappy weather.
Terry
I only have 2 spectra taken due to crappy weather.
Terry
Terry Bohlsen
Armidale NSW
Australia
Armidale NSW
Australia
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Re: Bright nova in Centaurus
Hi Terry,
Nice work. Like you, I also managed some simultaneous photometry last night. I used my transformed V-band image in ISIS to create a flux calibrated version similar to yours. I think it serves to provide a useful comparison.
Cheers,
Paul
Nice work. Like you, I also managed some simultaneous photometry last night. I used my transformed V-band image in ISIS to create a flux calibrated version similar to yours. I think it serves to provide a useful comparison.
Cheers,
Paul
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Re: Bright nova in Centaurus
François Teyssier
http://www.astronomie-amateur.fr
http://www.astronomie-amateur.fr
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Re: Bright nova in Centaurus
Corrected (thanks, Paul!)
Steve Shore (University of Pisa) requests spectroscopic observation of Nova Oph 2017
Steve Shore wrote: Oph 2017 is now starting to form dust (see: http://www.astronomerstelegram.org/?read=10492), it’s essential that high resolution observations be obtained now and continuing for at least the next month with a cadence of about 1 or two days
Spectra should be obtained at a resolution of at least R = 5000
H alpha would certainly be enough for the basic observation. It doesn’t even require that high a S/N, just the change in the symmetry of the line will suffice. Yes, the brightness will drop considerably, that’s why now is so important.
Low resolution spectra are also usefull if flux calibrated
Nova Oph 2017 is currently at mag V = 15 and R = 13.5
So I think impossible at that resolution with amateur scopes
Steve Shore (University of Pisa) requests spectroscopic observation of Nova Oph 2017
Steve Shore wrote: Oph 2017 is now starting to form dust (see: http://www.astronomerstelegram.org/?read=10492), it’s essential that high resolution observations be obtained now and continuing for at least the next month with a cadence of about 1 or two days
Spectra should be obtained at a resolution of at least R = 5000
H alpha would certainly be enough for the basic observation. It doesn’t even require that high a S/N, just the change in the symmetry of the line will suffice. Yes, the brightness will drop considerably, that’s why now is so important.
Low resolution spectra are also usefull if flux calibrated
Nova Oph 2017 is currently at mag V = 15 and R = 13.5
So I think impossible at that resolution with amateur scopes
François Teyssier
http://www.astronomie-amateur.fr
http://www.astronomie-amateur.fr
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Re: Bright nova in Centaurus
Aside from oscillating hydrogen emission lines, there's still little change noted in ASASSN-17gk (Nova Cen).
Paul
Paul
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Re: Bright nova in Centaurus
Hi Paul,
Great serial spectra...
Great serial spectra...
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
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Re: Bright nova in Centaurus
An update on ASASSN-17gk.
Starting to get low in the south west, but as it enters the nebula phase, some interesting features (N II) changing over the course of 24 hours (resolvable even with the Alpy).
Paul
Starting to get low in the south west, but as it enters the nebula phase, some interesting features (N II) changing over the course of 24 hours (resolvable even with the Alpy).
Paul