Nova in Cassiopea (nova Cas 2020)

Alerts and Monitoring of Novae
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Peter Somogyi
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Joined: Sun Jul 13, 2014 8:56 am

Re: Nova in Cassiopea (nova Cas 2020)

Post by Peter Somogyi »

Weather cleared again, this time have taken 3 regions with the 300/1200 Newton + LHires III + 600/mm(vis) grating + Orange wratten filter.
O I 7773 + extra features
O I 7773 + extra features
Ca II IRT show outstanding intensities and increased velocities, with Paschen end not relevant:
Ca II IRT
Ca II IRT
novacas2020_20200820_907.png (51.91 KiB) Viewed 5113 times
Interestingly, the 'N I Lit' ("N I from literature") marked wavelengths do not show any correspondence to any real feature. Literature means: Raies_Novae.pdf and 1208.0380.pdf from arxiv.
However, the other 'N I' features I've copy/pasted here in PlotSpectra input are from VSpec (the more intense ones), so the N I needs confirmation by experts.
Also taken a H-alpha region (with 2 unsure features at 7000 and 7100A), sending it to the database.
Peter
Olivier GARDE
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Location: Rhône Alpes FRANCE
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Re: Nova in Cassiopea (nova Cas 2020)

Post by Olivier GARDE »

Heres' a spectrum taken last night :
Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Christian Buil
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Re: Nova in Cassiopea (nova Cas 2020)

Post by Christian Buil »

An UVEX (by Shelyak) spectrum of nova Cas (300 g/mm grating, R = 800, ASI183MM camera on Celestron 9.25), for the 21.103 August :

Image

Image

Christian B
etienne bertrand
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Re: Nova in Cassiopea (nova Cas 2020)

Post by etienne bertrand »

Bonjour,
Sur les spectres de la Nova vous indiquez qu'ils sont prit depuis l'OHP finalement la spectro party à lieu ? :)
Peter Somogyi
Posts: 420
Joined: Sun Jul 13, 2014 8:56 am

Re: Nova in Cassiopea (nova Cas 2020)

Post by Peter Somogyi »

Got one more sky, experimentally taken the 8650-9300A region, looking for other rare lines:
IR end for ccd and grating, telluric holes in 2nd half
IR end for ccd and grating, telluric holes in 2nd half
The upper half is contaminated by tellurics (visible also on reference stars) - besides the IR end is really low on signal.
Nevertheless, it's showing multiple suspects for a weak and wide Paschen.
Another region reveal widened Fe II lines, with a narrow P-Cyg:
FeII widened
FeII widened
novacas_20200821_987.png (44.12 KiB) Viewed 5049 times
Peter
Christian Buil
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Re: Nova in Cassiopea (nova Cas 2020)

Post by Christian Buil »

Etienne, et bien non malheureusement, la Star Party OHP n'a pas pu ce dérouler. Un petit groupe de 3 à 5 personnes a pu se réunir un bref moment sur place pour de la mise au point spectro (UVEX notamment) ou encore pour discuter administrativement avec l'observatoire et maintenir contacts pour la suite, mais rien ne pouvais ce faire raisonnablement coté stage, et en étant passé sur place, je peux mieux m'en rendre compte. Vivement l'an prochain !

Christian Buil
Christian Buil
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Re: Nova in Cassiopea (nova Cas 2020)

Post by Christian Buil »

UVEX 1200 g/mm grating for August 22.03 (C9.25 telescope) :

Image

For curiosity the gamma Cas spectrum (Be star) by using the same setup and the same date :

Image

Christian
etienne bertrand
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Re: Nova in Cassiopea (nova Cas 2020)

Post by etienne bertrand »

Ok Christian,

Merci pour pour ton message. Si tu as des photos d'ambiances n'hésites pas à les poster c'est toujours agréable à voir et l'OHP.
Amicalement
Christian Buil
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Re: Nova in Cassiopea (nova Cas 2020)

Post by Christian Buil »

Very short (900 s) exposure of near-IR region (wind (le Mistral) + bad seeing, near 5 arcec):

Image

Quelques photos de ce petit run à l'OHP. Travail sur UVEX :

Image

Sur un C9.25:

Image

Sur un RC12 Kepler:

Image

Christian
etienne bertrand
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Re: Nova in Cassiopea (nova Cas 2020)

Post by etienne bertrand »

merci pour les photos :D , c'est impressionnant ces télescopes !
Belle ambiance.
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