Delta Sco brightens mag V = 0.8
Posted: Sun Jan 31, 2016 11:05 am
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Delta Sco brightens mag V = 0.8
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Re: Delta Sco brightens mag V = 0.8
Posted: Mon Feb 01, 2016 3:43 am
Bonjour à tous, je confirme l'explosion.
Cordialement Umberto
Cordialement Umberto
Re: Delta Sco brightens mag V = 0.8
Posted: Mon Feb 01, 2016 9:04 am
Molto Buono, Umberto:
Tu été le premier.
Amicalement, Joan.
Tu été le premier.
Amicalement, Joan.
Re: Delta Sco brightens mag V = 0.8
Posted: Mon Feb 01, 2016 10:50 am
Merci Joan, je vis maintenant les spectres à basse résolution sur Bess qui ne sont pas différents de ce que mon.
Je ne pense pas que ce outburst, je présente mes excuses pour l'erreur de jugement.
Cordialement Umberto
Je ne pense pas que ce outburst, je présente mes excuses pour l'erreur de jugement.
Cordialement Umberto
Re: Delta Sco brightens mag V = 0.8
Posted: Mon Feb 01, 2016 6:10 pm
Good shot Umberto, but unfortunatly a false alert (despite an ATel !)
All the best,
François
All the best,
François
Re: Delta Sco brightens mag V = 0.8
Posted: Tue Feb 02, 2016 10:17 am
The star Del Sco, in the last night.
J.Guarro.
J.Guarro.
Re: Delta Sco brightens mag V = 0.8
Posted: Wed May 11, 2016 6:11 am
Here is a spectra of del SCO taken last night with a CDK17 telescope, JTW L200 spectroscope, and ST-10xme CCD:
The calibrated with neon lamp and instrument corrected spectrum shows a nice fit of HA & Hb emission lines and a the He I line as
well as Hy and Hdelta absorption lines. The heliocentric velocity is +6.73 km/s and del SCO's space velocity is -6 km/s according
to the Simbad database. The object was quite low (>2 air mass) when shooting the 9x30 second exposure(s) at 1x1 binning, so my
telluric O2 lines are very prominent.
James Foster
Los Angeles, Ca
The calibrated with neon lamp and instrument corrected spectrum shows a nice fit of HA & Hb emission lines and a the He I line as
well as Hy and Hdelta absorption lines. The heliocentric velocity is +6.73 km/s and del SCO's space velocity is -6 km/s according
to the Simbad database. The object was quite low (>2 air mass) when shooting the 9x30 second exposure(s) at 1x1 binning, so my
telluric O2 lines are very prominent.
James Foster
Los Angeles, Ca
Re: Delta Sco brightens mag V = 0.8
Posted: Wed May 11, 2016 5:15 pm
Hello James,
It looks like your continuum is a bit eventful, mostly in blue part.
Is it real shapes from star?
Here are some low resolution spectra taken from arasbeam.free.fr :
SNR problem?
IR correction problem?
Ripples?
Benji
It looks like your continuum is a bit eventful, mostly in blue part.
Is it real shapes from star?
Here are some low resolution spectra taken from arasbeam.free.fr :
SNR problem?
IR correction problem?
Ripples?
Benji
Re: Delta Sco brightens mag V = 0.8
Posted: Mon May 16, 2016 3:18 pm
Hi James,
I agree with Benji, there does seem to be some unexpected ripples in the blue half of the spectrum. Did you make a flat correction? (This is particularly important with some Kodak CCD based cameras which can have strong ripples in the wavelength response which show up in low resolution spectra)
Robin
I agree with Benji, there does seem to be some unexpected ripples in the blue half of the spectrum. Did you make a flat correction? (This is particularly important with some Kodak CCD based cameras which can have strong ripples in the wavelength response which show up in low resolution spectra)
Robin
Re: Delta Sco brightens mag V = 0.8
Posted: Mon May 16, 2016 6:58 pm
No flat was used. The air mass was low (>1.9) and that part of the sky has pretty bad LP.
When shooting, especially after using neon lamp, I do 10-18 flush (dark frames) to purge
Any remaining after glow on the chip. I didn't see "ripples" on any other object's spectra
That night.
James
p.s. I'll post one or two more del SCO spectra taken when higher in the sky.
When shooting, especially after using neon lamp, I do 10-18 flush (dark frames) to purge
Any remaining after glow on the chip. I didn't see "ripples" on any other object's spectra
That night.
James
p.s. I'll post one or two more del SCO spectra taken when higher in the sky.