12 April 2017 at 1:59 pm #573733Jeremy ShearsParticipant
I am delighted to announce that this morning our Member’s Pages reached a significant milestone. The 100th Member’s page since we went live last November was uploaded to britastro!
It belongs to Marc Trypsteen, one of our newest members who joined just a few days ago. Welcome on board, Marc! I wish you a long a fruitful membership of the BAA.
Many thanks to everyone who contributes to BAA Member’s Pages. I always enjoy looking at your work and learning about what interests you.
All the best,
Jeremy12 April 2017 at 3:09 pm #578117Dr James DawsonParticipant
Great stuff. Welcome Marc.
James12 April 2017 at 4:46 pm #578119
Many thanks for this remarkable welcome. I did not realize I created the 100th Member’s page, so I’m pleasantly surprised. This BAA membership will give me a great opportunity to promote astronomical spectroscopy and also upcoming Pro-Am projects is this field. I’m certainly looking forward to get acquainted with the BAA members ! Many thanks again! Marc.12 April 2017 at 8:19 pm #578120Andy WilsonKeymaster
Welcome to the BAA Marc and great to have another spectroscopist! As you have no doubt seen, the spectroscopy forum has been very active.
Andy13 April 2017 at 11:16 pm #578124
Many thanks, Andy.
Good to see “Spectroscopy” is “alive and kicking” also among the BAA members 🙂
I think the upcoming VV Cephei Eclipse Campaign, which I propose to be called ” VV CEC 2017-19” is a great, if not the opportunity for all “Spectroscopically active members” to contribute to this exciting and interesting event. Must be doable for the major part of the members, as the magnitudes are within the range of most telescopes.
Would be a good idea to prepare a “standardized” recording protocol for the LR (R< 10.000) and HR (R>10.000) spectroscopy and a list of the types of available spectrograph equipments as well as a contributing observer list. Every contributing observer can be mentioned this way on the scientific papers afterwards.
As Ernst Pollmann already mentioned, a sufficiently pre-running baseline will be the major concern to finetune the V/R changes afterwards.
Marc.14 April 2017 at 12:51 pm #578125Andy WilsonKeymaster
It is great to see how spectroscopy has grown at the BAA over the past couple of years. The subject being one of the main areas of discussion on the forum, with advice being given to help members get started, as well as some fantastic results being shared.
We also have a spectroscopy database where members can upload their 1D fits format files. Noting a separate login is needed as it runs on different software to the main BAA webpages.
I think Ernst’s proposal for a VV Cep campaign is great. Though I am aware that Ernst has a long running campaign on VV Cep and so I am not sure if it is appropriate to think of it as a BAA campaign. There is a separate thread that Ernst has started on the campaign so probably best to post any questions there so that there is a single place to access the information.
Sadly for me a bank holiday weekend when I actually have time to do some spectroscopy and the forecast is for wall to wall cloud! Oh well, as a UK based amateur astronomer I learned along time ago that large reserves of patience are essential 😉
Andy14 April 2017 at 2:14 pm #578126
Indeed Andy, the excellent work of Ernst Pollman on the VV Cep campaign deserves certainly a broader participants group. I think he is looking for more observers to enter the project. I will contact him about his point of view on that.
Marc.26 April 2017 at 9:56 am #578161David BoydParticipant
Welcome to the BAA spectroscopy forum. It is great to see someone with your experience joining us.
As you will have seen from some of the earlier posts to the forum, several of our members have recently acquired low resolution spectrographs such as the Alpy and LISA. It would be helpful if you could explain whether, and how, such low resolution devices can make a useful contribution to the VV Cep campaign. The analysis Ernst has been describing clearly requires high resolution H-alpha observations. If low resolution observations are useful, I am sure some of us would contribute.
David1 May 2017 at 9:32 pm #578178
Many thanks for this friendly welcome. Encouraging enthusiastic people in the exciting world of spectroscopy is my mission and passion.
Concerning the LR spectral possibilities in case of VV Cep:
Because measurements of Radial velocities, Equivalent Widths and V/R component behavior require real R values >10000 those measurements are not possible with a low or medium resolution spectrograph.
Nevertheless LR recordings are certainly welcome for other purposes. Here come two doublets to the scene: Sodium Na I at 5889.95-5895.92 Å and Potassium K I at 7665 – 7699 Å . Their behavior (IP) and broadening is interesting to study general behavior, observe effects such as reddening, which is important to estimate temperatures & distances. Also the fact that with LR a broader spectral range is visible, which can give insight in the overall behavior of interstellar mass transfer around the primary eclipse period. So LR spectral recordings are certainly welcome and I encourage interested people to participate! Exposure times for Alpy and LISA between 180 and 300 s will be sufficient, depending on telescope size.
Of course we must keep in mind that spectrographs like the Alpy and LISA are in fact designed especially for the study of faint astronomical objects.
So LR spectra can be uploaded to the database, so we can compare them individually.
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