Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User

Observing >> Variable Star Observing and Radio Astronomy

Pages: 1
nytecam
Postmaster


Reged: 08/20/05

Loc: London UK
Nova Del - jump in emission lines !
      #6034904 - 08/19/13 04:40 PM

In dusk tonight (London UK) the emission lines of Ha and Hb and others have doubled in intensity over last night. Get those spectroscopes recording !

My uncalibrated spectra taken ~hour apart here and here



Edited by nytecam (08/19/13 06:06 PM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
robin_astro
sage


Reged: 12/18/05

Re: Nova Del - jump in emission lines ! new [Re: nytecam]
      #6035408 - 08/19/13 09:26 PM

Spectra from Australia by Terry Bohlsen
http://i566.photobucket.com/albums/ss109/TCB168/NovaDel18_19_8TB_zps8c7c79ad.png
and later from France tonight by Francois Teyssier
http://www.spectro-aras.com/forum/download/file.php?id=1043
fill in some of the gaps and show how this dramatic change progressed (The absorption part of the P Cygni profiles has disappeared)

Amateur collaboration on a global scale is really beginning to paying off with this one but there is still plenty of room for more observers.

Robin


Post Extras: Print Post   Remind Me!   Notify Moderator  
nytecam
Postmaster


Reged: 08/20/05

Loc: London UK
Re: Nova Del - jump in emission lines ! new [Re: robin_astro]
      #6038123 - 08/21/13 11:05 AM Attachment (24 downloads)

Here's my raw profiles for Aug 16, 18, 19 and 20 showing the rise of the emission lines at this stage since outburst

Post Extras: Print Post   Remind Me!   Notify Moderator  
Rich (RLTYS)Moderator
Postmaster
*****

Reged: 12/18/04

Loc: New York (Long Island)
Re: Nova Del - jump in emission lines ! new [Re: nytecam]
      #6039632 - 08/22/13 06:30 AM

Cool.

Rich (RLTYS)


Post Extras: Print Post   Remind Me!   Notify Moderator  
nytecam
Postmaster


Reged: 08/20/05

Loc: London UK
Re: Nova Del - jump in emission lines ! new [Re: Rich (RLTYS)]
      #6040583 - 08/22/13 06:15 PM Attachment (19 downloads)

Thanks Rich - here's toght's rising profile - Ha takes the lead

Post Extras: Print Post   Remind Me!   Notify Moderator  
nytecam
Postmaster


Reged: 08/20/05

Loc: London UK
Re: Nova Del - jump in emission lines ! new [Re: nytecam]
      #6040639 - 08/22/13 06:51 PM Attachment (22 downloads)

5 evening's results over 7 days below

Post Extras: Print Post   Remind Me!   Notify Moderator  
7331Peg
Sirius Observer
*****

Reged: 09/01/08

Loc: North coast of Oregon
Re: Nova Del - jump in emission lines ! new [Re: nytecam]
      #6041118 - 08/23/13 01:29 AM

How are the jumps in H-Beta and H-alpha related to brightness? I see they've been steadily increasing as the nova's been dimming over the last few days, so is it safe to say there's an inverse relationship here? Or is something else involved?


John


Post Extras: Print Post   Remind Me!   Notify Moderator  
nytecam
Postmaster


Reged: 08/20/05

Loc: London UK
Re: Nova Del - jump in emission lines ! new [Re: 7331Peg]
      #6041217 - 08/23/13 03:59 AM

Quote:

How are the jumps in H-Beta and H-alpha related to brightness? I see they've been steadily increasing as the nova's been dimming over the last few days, so is it safe to say there's an inverse relationship here? Or is something else involved? John


John - I've used the 'peak' immediately right of H-beta as my reference in each case and scaled each nightly spectrum, under varying transparency and thus exposure, to the same point - effectively as the star's background continuum decreases as the nova fades, the emission lines become more prominent but the dominant effect is the rise in intensity of the emission lines themselves as the "fog" clears around the nova's atmosphere.

The question of "brightness" or magnitude is containtly raised [as one would expect for a VS Forum] but my spectroscopy [and others] are primarily interested in the development of the spectrum, independant of its brightness - hope that clarifies


Post Extras: Print Post   Remind Me!   Notify Moderator  
7331Peg
Sirius Observer
*****

Reged: 09/01/08

Loc: North coast of Oregon
Re: Nova Del - jump in emission lines ! new [Re: nytecam]
      #6042023 - 08/23/13 03:00 PM

Thanks -- that does help to clear up the "fog" just a bit, at least. I need to learn more about spectroscopy one of these days.


John


Post Extras: Print Post   Remind Me!   Notify Moderator  
nytecam
Postmaster


Reged: 08/20/05

Loc: London UK
Re: Nova Del - jump in emission lines ! new [Re: 7331Peg]
      #6069686 - 09/08/13 02:58 PM Attachment (18 downloads)

Here's the nova's starfield and normal profile [cyan] and expanded [purple] in 3s exp from Friday night Sept 6th - my tenth night of observation of its spectra. The nova is fading below naked eye visibility but the spectrum has settled down and essentially constant

Post Extras: Print Post   Remind Me!   Notify Moderator  
NJScope
sage
*****

Reged: 03/08/04

Loc: NJ
Re: Nova Del - jump in emission lines ! new [Re: nytecam]
      #6071805 - 09/09/13 06:00 PM Attachment (14 downloads)

Nytecam:

Very similar results were obtained last evening from Nova Del 2013 using a C8/DSS-7/ST402ME spectrometer. Halpha is really dominant but the other Balmer emission lines are still clearly evident.


Post Extras: Print Post   Remind Me!   Notify Moderator  
old_frankland
Carpal Tunnel


Reged: 03/28/05

Loc: San Francisco Bay Area
Re: Nova Del - jump in emission lines ! new [Re: NJScope]
      #6086426 - 09/17/13 05:19 PM

Excellent work, Maurice. Simply outstanding.

Which software do you use for plotting?

Keep 'em coming!


Post Extras: Print Post   Remind Me!   Notify Moderator  
nytecam
Postmaster


Reged: 08/20/05

Loc: London UK
Re: Nova Del - jump in emission lines ! new [Re: old_frankland]
      #6086516 - 09/17/13 06:12 PM

Quote:

Excellent work, Maurice. Simply outstanding. Which software do you use for plotting? Keep 'em coming!


Thanks - just SX Lodestar s/ware ["intensity plot of selected pixel row"], tweaked in PaintShopPro v4 imaging s/ware and MS Moviemaker Live s/ware for video

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1


Extra information
0 registered and 2 anonymous users are browsing this forum.

Moderator:  Rich (RLTYS) 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 1019

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics