Symbiotic recurrent nova RS Oph in ourburst !!!

[Olivier GARDE]

Last night, I have try to use a high resolution spectrograph (R=30000) on RS Oph.
This is the whoppshel spectrograph :
https://www.shelyak.com/produit/whoppshel/?lang=en

I have a small telescope of 400mm in diameter, so not realy the good size for this echelle resolution (and many clouds during observations) but I can have a wavelength range from 4000 to 7200Å

Here’s some graphs around H alpha and H Beta

[Joan Guarro Flo]

Hello,

Those are some graphics from Piera, with a SC16 + NOU_T echelle + ASI2600MM camera.

Regards, J.Guarro.

[Vincent Lecocq]

]hello,

a quick comparison between 09/08 and 10/08 low-res spectra of RS Oph, to be continued !

vincent

[Christian Buil]

StarEx spectra of RS Oph for the 10-11 August from Antibes. StarEx is the stellar version of the low cost SolEx instrument dedicated to the solar observation (a 3D printing setup !).
The spectrograph is on a 200-mm Newton telescope working at f/5.

The Halpha region at R=1700 (600 lines/mm grating version) :





The UV region at R=1350 (by rotating the grating knob):



The reasonable UV limit wavelength is here 3640 A.

We can note that StarEx is capable of fine astrophysics despite a low cost. Some examples for same spectral region, Vega:



Deneb:



gamma Cyg:



StarEx during session test at OHP observatory last week:



Christian Buil

(SolEx project: http://www.astrosurf.com/solex/)

[Alun Halsey]

My attempt last night (10th) using my C9.25 and Lhires III with 23m slit riding on a CEM60,captured 9x60sec images. I chose Vega as reference star,and RS Oph profile normalized at wavelength 6498 to 6503. Used ISIS to carry out calibration and Vspec to create chart.

_rsoph_20210810_902_alun halsey.png (7.27 KiB) Viewed 61653 times

Alun Halsey

[Terry Bohlsen]

Hi All
This is my effort from last night.
I used my LOSPEC at R=~4700 and my LHIRES R=16000.
Interesting to see the difference that the resolution makes.
Terry

[Vincent Lecocq]

last night, good night, and now bad weather is coming back

so here is a low res comparison between 09 and 11 august, 4 spectra by night (1/hour):

vincent

[James Foster]

I had my LhiresIII in "CaK-mode" so I shot RS Oph in this region on 09-Aug-2021:

After this date, I changed to "Ha-mode" for spectra on 10 & 11 Aug21:
10Aug21:

11Aug21(Out of 22 only 9 were worth processing because of cloudy skies):

We seem to be having a good run on exploding stars! (NOTE: Most CaK lines identified are tentative)
Any thought appreciated........

James

[Paolo Berardi]

Hi all,

great spectra! Joan, your profiles are *top level*!

Significant changes of neutral oxygen line in two days:



Have a nice observations!
Paolo

[Olivier GARDE]

My spectrum of the last night taken with a whoppshel R=30000.



And the evolution during last 3 days (one spectrum per day)





And the raise of Iron lines



All spectra are corrected from heliocentric velocity.