Suspected symbiotic - Spectra required

Suspected symbiotic - Spectra required

Postby Francois Teyssier » Tue Apr 28, 2020 4:06 pm

A request from Adrian Lucy:


If anyone has visibility, we'd like a new optical spectrum of IRAS 13224-5839, one of our symbiotic candidates, to follow up on some possible X-ray variability in recent Swift observations. Any resolution is acceptable. Although I've only seen Balmer lines previously in my observations of this target, just in case I'd like coverage of Halpha, Hbeta, [O III] 5007, and He II 4686.
The coordinates are: 13:25:41.7 -58:55:05.9
Archival V-band photometry ranges from around 13 to 15, but I don't know the current magnitude.

I may want more followup observations in the future on this target, like once every three weeks for a few months, but since it would be better to time to Swift observations (if we get them), I suppose I'll alert you or individual observers later...

Thanks! Hope you're all doing ok and taking care of yourselves. I may have a larger sample of southern targets for you soon...

Adrian B. Lucy
NSF Graduate Research Fellow, Dept. of Astronomy, Columbia University


Note: two new symbiotic stars were discovered in the frame of the observing program proposed by Adrian Lucy +

https://iopscience.iop.org/article/10.3847/2515-5172/aaf71c/meta
http://www.astrosurf.com/aras/novae/InformationLetter/ARAS_EruptiveStars_2019-04.pdf

http://www.astrosurf.com/aras/Aras_DataBase/Symbiotics/Suspected.htm
Francois Teyssier
 
Posts: 1345
Joined: Fri Sep 23, 2011 1:01 pm
Location: Rouen

Re: Suspected symbiotic - Spectra required

Postby Francois Teyssier » Sun May 17, 2020 9:39 pm

A new request from Adrian Lucy:
(Two new symbotic stars have been discovered by Terry Bohlsen and Forrest Sims within the frame work of Adrian's program)

I could really use a spectrum to check on the optical state for each of the following targets around the following days, in conjunction with Chandra and Swift observations of these symbiotic candidates (the exact times for the Chandra observations are given only in case anyone wants to try for spectra at exactly the same time, but it's not necessary):

IRAS 15175-4508
on or around this Monday, May 18 (17:30--23:43 UT)
15:20:58.3 -45:19:44.4
V~12.8?

Haro 1-10
on or around Sunday, May 24 (16:20--19:05 UT)
16:27:49.8 -29:16:45.5
V~14.7?

IRAS 13224-5839
on or around May 19 and June 10
13:25:41.7 -58:55:05.9
V~13.4

Any resolution is acceptable. I'd like coverage of at least Halpha, Hbeta, [O III] 5007, and He II 4686. Maybe Raman O VI 6830 just in case.

Thanks!
Adrian


--
Adrian B. Lucy
NSF Graduate Research Fellow, Dept. of Astronomy, Columbia University
Francois Teyssier
 
Posts: 1345
Joined: Fri Sep 23, 2011 1:01 pm
Location: Rouen


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