Search found 191 matches

by Terry Bohlsen
Tue Oct 13, 2020 10:31 am
Forum: Miscellanous
Topic: Request for spectrum asassn 20mg dec 48 south
Replies: 17
Views: 15129

Re: Request for spectrum asassn 20mg dec 48 south

Hi Hamish
I’m currently taking a spectra with my LISA and V images also. I’ll post it here later.
Terry
by Terry Bohlsen
Fri Oct 09, 2020 7:01 am
Forum: Novae
Topic: Nova Sgr 2020 No 4
Replies: 5
Views: 4483

Nova Sgr 2020 No 4

A new nova in Sgr that is currently mag V=10.77
I have taken 2 spectra of it so far with my LISA.
Lots of change over 2 days.
Terry
nsgr2020no.4_20201006_8_TBohlsen.png
by Terry Bohlsen
Wed Sep 30, 2020 11:48 am
Forum: Spectroscopes and Softwares
Topic: First Spectra from my new UVEX
Replies: 0
Views: 1721

First Spectra from my new UVEX

Hi All I have built a UVEX spectrograph. I purchased a 600l/mm and 1200 l/mm grating but have only installed the 1200 so far. I had to modify the design somewhat as I did not want to buy a new slit so am using a slit that was designed for my LISA. I had it spare as I had replaced it with a photometr...
by Terry Bohlsen
Sat Aug 22, 2020 10:38 am
Forum: General Topics, Annoucements, Forum Life
Topic: AAVSO free spectroscopy webinar!
Replies: 2
Views: 3237

Re: AAVSO free spectroscopy webinar!

This would be very good but 04:00 local time is a bit difficult. :D
Will it be recorded?

Terry
by Terry Bohlsen
Sun Aug 02, 2020 7:33 am
Forum: Symbiotic Stars
Topic: Suspected/Misclassified Symbiotics: spectra required
Replies: 128
Views: 144292

Re: Suspected/Misclassified Symbiotics: spectra required

Hi
I have taken spectra of EC19249-7343 and V618 Sgr.
V618 Sgr seems to have NaI emission and a very weak Ha emission.
Terry.
ec19249-7343_20200730_455_TBohlsen.png
v618sgr_20200730_496_TBohlsen.png
by Terry Bohlsen
Tue Jul 28, 2020 1:20 am
Forum: UVEX Project
Topic: UVEX3/CALIBREXV2
Replies: 8
Views: 7111

Re: UVEX3/CALIBREXV2

How did you modify the slit holder to take the photometric slit?
I have a spare LISA slit but it is much larger than the holder. I may make a holder out of aluminium to accommodate the larger slit.
Terry
by Terry Bohlsen
Wed Jul 22, 2020 5:43 am
Forum: Symbiotic Stars
Topic: Suspected/Misclassified Symbiotics: spectra required
Replies: 128
Views: 144292

Re: Suspected/Misclassified Symbiotics: spectra required

Hi
I have also taken a spectra of Hen 3-860 or WRAY 15-1062 as it came up on Simbad.
It is clearly a symbiotic star.

Terry
wray15-1062_20200721_510_TBohlsen.png
by Terry Bohlsen
Mon Jul 20, 2020 10:32 am
Forum: Novae
Topic: Nova Sgr 2020c (2020-07-16)
Replies: 4
Views: 4635

Re: Nova Sgr 2020c (2020-07-16)

Spectra from last night. Very wide features. taken with my LISA and LOSPEC giving 2 different resolutions R=1800 and R=4000.

Terry
nsgr2020no3_20200719_464_TBohlsen.png
by Terry Bohlsen
Mon Jul 13, 2020 10:56 am
Forum: Symbiotic Stars
Topic: Suspected/Misclassified Symbiotics: spectra required
Replies: 128
Views: 144292

Re: Suspected/Misclassified Symbiotics: spectra required

I will hopefully be able to obtain spectra of the 2 southern stars but the weather needs to improve first. :D
Terry
by Terry Bohlsen
Sat May 09, 2020 7:28 am
Forum: Astrophysics, Theory, Publications ...
Topic: possible black hole binary/ternary system in ArasBeAm
Replies: 3
Views: 4902

Re: possible black hole binary/ternary system in ArasBeAm

Hi Hamish This could be an interesting star to follow. I have taken spectra of it before at Ha, but Ha is not much good to measure the RV fo this star . He I 6678 is easy to image and seems to give good measurements. This is another link to the paper. https://www.eso.org/public/archives/releases/sci...