WR140 aproaching periastron

[Olivier GARDE]

Here's a comparaison between a spectrum taken last night with another from last August (eShel Spectrograph)

[Thierry Lemoult]

I got a spectrum tonight of WR140. With eShel R=11000, ATIK460, Celestron C14.
But i forget who collects these data ?

Regards

Thierry Lemoult

[Olivier GARDE]

Thierry,

I don't know who collects the spectra...

But I upload my last spectra of WR140 in BAA data base

Olivier

[Francisco Campos]

Hello,

congratulations to everybody for your excellent spectra. Here you are the result of three consecutive nights. All spectra taken with the DADOS (1200 l/mm, R=5200-5700) operating through a newton 8". Exposures of 5x1200" (except the first night, 3x900" with bad seeing).

wr140_ 20161202_754_FPC amp.png (35 KiB) Viewed 7244 times

Also, I wonder where can I upload these fits.

Clear skies!
Fran

[Robin Leadbeater]

The campaign was originally announced on the Pro-Am Convento forum. The link is here
http://www.spectro-aras.com/forum/viewt ... =20&t=1483
Noel Richardson also requested data via AAVSO
https://www.aavso.org/aavso-alert-notice-546

I plan to save mine up until after periastron and offer the full set to Noel Richardson or whoever on the Convento forum make can use them. Eventually I will put them on the BAA database for future researchers.

Cheers

[James Foster]

I've shot this object as well! Unfortunately, I just barely found-out I missed the interesting lines longer than 5850 angstroms in most of my shots;
thanks to the spectra presented here I was able to figure out my equivalent Relco Ne-Ar lines! I'll get these longer wavelengths on subsequent spectra.

Here is my result of observations (line calibrated/instrument response corrected) taken on 30-Nov-2016:


Hope to catch more activity as the stellar winds increase and collide. Looking forward to the excellent spectra taken here!
(Btw, I shot some CaK and Ha shots which I'll show later)

James Foster
Los Angeles, CA

[James Foster]

I just processed data for WR140 taken on 09 Dec 2016 (sum 8x300sec exposures, 2x2 bin):

When I compare this to the data taken on 30Nov16, I see some change in the CIII "mound."
Weather has taken a turn for the worse so I may need to go to the field to take data close
to periston on 18Dec16!

James

[Olivier GARDE]

New spectrum of WR 140 taken last night.
Some smalls évolutions in 6 days

[Joan Guarro Flo]

Hello :

I believe that together, we are getting good results with the ER140.

I leave you with a graph of test reliability of the observation Paolo Beradi and one of mine.

Also a graph of 10 days in 2016 05/2016 12 08.

Regards, Joan.

[James Foster]

Here is my latest (14Dec16) spectrum of WR140:

CIII and HeI looks more prominent; I did a longer exposure and used a wider slit
to improve my spectral efficiency, which at the wavelength is kinda of week.

I see a lot of light pollution background in my spectra, which is towards downtown
LA 10 miles away; see:


James Foster
Los Angeles, CA