V1369 Cen

Information about outbursts of eruptive stars, Be activity, ...

Re: V1369 Cen

Postby Malcolm Locke » Tue Jan 28, 2014 10:40 am

I'm not sure what is in the ISIS config files, but in plain old gnuplot the following would do it I think:

Code: Select all
set format y "%g"


That will use the decimal or scientific notation, whichever is shorter. See http://gnuplot.sourceforge.net/docs_4.2/node184.html for other formats.
Malcolm Locke
 
Posts: 25
Joined: Mon Dec 16, 2013 11:27 am

Re: V1369 Cen

Postby Terry Bohlsen » Wed Jan 29, 2014 9:11 am

Malcolm Locke wrote:I'm not sure what is in the ISIS config files, but in plain old gnuplot the following would do it I think:

Code: Select all
set format y "%g"


That will use the decimal or scientific notation, whichever is shorter. See http://gnuplot.sourceforge.net/docs_4.2/node184.html for other formats.

Thanks Malcolm
That works perfectly.
Terry
Terry Bohlsen
Armidale NSW
Australia
Terry Bohlsen
 
Posts: 157
Joined: Thu Sep 29, 2011 7:40 am

Re: V1369 Cen

Postby Malcolm Locke » Thu Jan 30, 2014 9:22 am

Some belated results from the 27th Jan. Terribly noisy I'm afraid. Still no guiding and I tried to narrow the slit gap slightly which made things worse, plus battling with various other technical issues. Shame as it was an incredible night down here, best we've had in months.

v1369_cen_20140127.png
v1369_cen_20140127.png (17.25 KiB) Viewed 6826 times


Close up of Hb an the FeII lines.

V1369_cen_Hb_and_FeII_20140127.png
Malcolm Locke
 
Posts: 25
Joined: Mon Dec 16, 2013 11:27 am

Re: V1369 Cen

Postby Malcolm Locke » Thu Jan 30, 2014 10:10 am

Finally got around to writing a python script to plot a grid of spectra. Here's all of the low / medium resolution spectra for the nova that are present in the ARAS database. Spectra are from myself, Jonathan Powles and Terry Bohlsen.

v1369_cen_20131203-20140127.png
Malcolm Locke
 
Posts: 25
Joined: Mon Dec 16, 2013 11:27 am

Re: V1369 Cen

Postby Christian Buil » Fri Jan 31, 2014 2:53 pm

Excellent!

Christian
Christian Buil
 
Posts: 1331
Joined: Mon Sep 26, 2011 6:59 pm

Re: V1369 Cen

Postby Malcolm Locke » Sat Feb 01, 2014 12:04 pm

H alpha velocity evolution to date. There is a large gap in the sequence between 19th Dec and 09 Jan, hence the
pronounced jump in velocities and line width at that point.

Thanks to Rogerio Marcon, Tasso Napoleao and Ken Harrison for providing the data in the ARAS database.

As you can probably tell from all the plots I am under cloud again :(

Halpha_velocity_20131205-20140121.png
Halpha_velocity_20131205-20140121.png (21.42 KiB) Viewed 6807 times
Malcolm Locke
 
Posts: 25
Joined: Mon Dec 16, 2013 11:27 am

Re: V1369 Cen

Postby Malcolm Locke » Wed Feb 05, 2014 9:30 am

Another dodgy effort from Feb 2nd. I left my t-ring at home and had to use a different one so the imaging camera focus was off :(

v1369_cen_20140202.png
v1369_cen_20140202.png (20.53 KiB) Viewed 6794 times


Can still just make out the asymmetric shape of the H beta line though.

v1369_cen_Hbeta_20140202.png
v1369_cen_Hbeta_20140202.png (10.77 KiB) Viewed 6794 times
Malcolm Locke
 
Posts: 25
Joined: Mon Dec 16, 2013 11:27 am

Re: V1369 Cen

Postby Malcolm Locke » Fri Feb 07, 2014 9:17 am

My best result yet, from Feb 6.491. A huge thanks to Andrei Cotiga from Canterbury Astro Society for helping me to get guiding working.

v1369_cen_20140206.png
v1369_cen_20140206.png (13.16 KiB) Viewed 6784 times


Some structure showing in the H alpha line.

v1369_cen_Ha_20140206.png
v1369_cen_Ha_20140206.png (10.02 KiB) Viewed 6784 times
Malcolm Locke
 
Posts: 25
Joined: Mon Dec 16, 2013 11:27 am

Re: V1369 Cen

Postby Tasso Napoleao » Fri Feb 07, 2014 11:33 pm

This is excellent indeed, Malc !

Below is our last profile, made on Jan 30 with a 2400 l/mm grating. I believe the line structures are quite the same perceived on Malc´s spectrum. Also, the trend for brightening, already pointed out by Terry on Jan 28, seems clear.

140130_novacentauri_600s.png
140130_novacentauri_600s.png (21.07 KiB) Viewed 6777 times


Last but not least - Jon, many thanks for your comments on the physics of the observed phenomenae. I had read several detailed descriptions about what was happening with Nova Del 2013, but was not able to find many on V1369 Cen. I would be particularly interested on a comparison of the evolution of both novae...any hint on that would be very welcome !

Cheers,
Tasso.
Tasso Napoleao
 
Posts: 17
Joined: Wed Dec 11, 2013 5:47 pm
Location: São Paulo, Brazil

Re: V1369 Cen

Postby Ken Harrison » Sat Feb 08, 2014 12:01 am

Tasso,
Do you have any hi-res spectra of the Hb/ Fe region around 4918A area?
Ken
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before....
"Imaging Sunlight - Using a digital Spectroheliograph" - Springer
http://www.astronomicalspectroscopy.com
Ken Harrison
 
Posts: 166
Joined: Thu Oct 25, 2012 5:45 am
Location: St Leonards, Australia

PreviousNext

Return to Outbursts and alerts

Who is online

Users browsing this forum: No registered users and 5 guests

x