Suspected Symbiotic Stars: campaign for Adrian Lucy

Re: Suspected Symbiotic Stars: campaign for Adrian Lucy

Postby Francois Teyssier » Thu Dec 20, 2018 5:41 pm

1. Research note of the newly identified yellow symbiotic Hen 3-1768 (≡ASAS J195948–8252.7), based on spectra obtained by Terry Bohlsen. Congratulations to Terry!
http://iopscience.iop.org/article/10.3847/2515-5172/aaf71c/meta

Hen3-1768.PNG
Hen3-1768.PNG (98.33 KiB) Viewed 3451 times


2. Additional targets in Adrian's list. Some of them observable from northern hemisphere.

http://www.astrosurf.com/aras/Aras_DataBase/Symbiotics/SuspectedLog.htm

François
Francois Teyssier
 
Posts: 1345
Joined: Fri Sep 23, 2011 1:01 pm
Location: Rouen

Re: Suspected Symbiotic Stars: campaign for Adrian Lucy

Postby Terry Bohlsen » Sun Dec 23, 2018 1:55 am

We have had poor weather in December so I haven't been able to do much observing. I did have some clear skies last night but with a full moon.
I observed GAIA DR2 4636654969717900032 which I have observed before. It is a mostly flat featureless spectrum.
I also observed the second star on the list without a name but it is UCAC3 157:43452 at mag 12.3 in CMa.
It shows some features but no emission. Both were 30 mins of exposure. More time is probably needed but since there wasn't any emission I didn't persevere.
Terry
_ucac3157.43452_20181222_467_TBohlsen.png
_ucac3157.43452_20181222_467_TBohlsen.png (7.96 KiB) Viewed 3427 times

_dr24636654969717900032_20181222_423_TBohlsen.png
_dr24636654969717900032_20181222_423_TBohlsen.png (8.87 KiB) Viewed 3427 times
Terry Bohlsen
Armidale NSW
Australia
Terry Bohlsen
 
Posts: 158
Joined: Thu Sep 29, 2011 7:40 am

Re: Suspected Symbiotic Stars: campaign for Adrian Lucy

Postby Francisco Campos » Sat Mar 30, 2019 6:56 pm

Hello,

here is a recent spectrum of the suspected symbiotic GDS J0731468-195434. No emission lines have been detected, the signal is low but enough to discard the presence of medium or strong emisison bands.

gdsj0731468-195434_ 20190329_842_FPC.png


Greetings,
Fran
Francisco Campos
 
Posts: 88
Joined: Sun Nov 29, 2015 10:13 pm

Re: Suspected Symbiotic Stars: campaign for Adrian Lucy

Postby Terry Bohlsen » Sun Apr 14, 2019 1:03 pm

Hi
These stars are starting to become visible in the evening again. I have taken spectra of 2 further targets.
GSC9507:2249 which is the 6th star on the list with no name.
_gsc95072249_20190412_517_TBohlsen.png
_gsc95072249_20190412_517_TBohlsen.png (7.81 KiB) Viewed 2975 times

GAA_DR2_41315875002733611280
_gaa_dr2_41315875002733611280_20190413_519_TBohlsen.png
_gaa_dr2_41315875002733611280_20190413_519_TBohlsen.png (8.23 KiB) Viewed 2975 times


Cheers
Terry
Terry Bohlsen
Armidale NSW
Australia
Terry Bohlsen
 
Posts: 158
Joined: Thu Sep 29, 2011 7:40 am

Re: Suspected Symbiotic Stars: campaign for Adrian Lucy

Postby Olivier GARDE » Wed May 29, 2019 2:58 pm

Last night, we tried to make GAIA DR24168021909706732672 (mag V = 14.3) with a one meter telescope and a LISA with 50µm slit.
We had a lot of clouds during the acquisitions and had to take the spectrum through the clouds

Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Olivier GARDE
 
Posts: 1060
Joined: Thu Sep 29, 2011 6:35 am
Location: Rhône Alpes FRANCE

Re: Suspected Symbiotic Stars: campaign for Adrian Lucy

Postby Olivier GARDE » Fri May 31, 2019 9:28 pm

And with the same setup : V2525 Oph

Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Olivier GARDE
 
Posts: 1060
Joined: Thu Sep 29, 2011 6:35 am
Location: Rhône Alpes FRANCE

Suspected Symbiotic Stars: two new targets

Postby Francois Teyssier » Sat Feb 15, 2020 6:12 am

Adrian Lucy (Columbia University) fairly-urgently need ARAS optical spectra (any resolution, e.g. R~700--1000 or higher covering at least Halpha, preferably also Hbeta and [O III] 5007) of IRAS 15175-4508 and Haro 1-10.

Adrian writes:

These are my top two non-burning symbiotic candidates, and I'm trying to get a Chandra DDT observation of them based on recent Swift results. The Chandra PI is concerned about whether they are still detectably accreting, so I'd like to compare the emission line strengths to my SpUpNIC spectra from last year.

The coordinates for IRAS 15175-4508 (V=12.3--13.6) are:
15:20:58.3 -45:19:44.4

The coordinates for Haro 1-10 (V=14.2--15.3) are:
16:27:49.76 -29:16:45.46


Send spectra to francoismathieu.teyssier at bbox.fr
Francois Teyssier
 
Posts: 1345
Joined: Fri Sep 23, 2011 1:01 pm
Location: Rouen

Previous

Return to Symbiotic Stars

Who is online

Users browsing this forum: No registered users and 1 guest

x