V1026 Sco (Be) Alpy600/T60

Show your spectra, your results ...
Post Reply
Daniel Dejean
Posts: 127
Joined: Sun Sep 18, 2016 7:20 am

V1026 Sco (Be) Alpy600/T60

Post by Daniel Dejean »

Hello All,
Here, near Toulouse/France, we are lucky to get access to the T60 telescope at the top of the Pic du Midi (2850m). To use the calibration module with Alpy60 it require to mount a corrector for proper backfocus. Details reports are available on the T60 web site (http://www.astrosurf.com/t60/) . After successful experiment with a Paracorr corrector by previous teams (see for example JP Godard/M.Verlinde result here : viewtopic.php?f=6&t=1716) , our goal was to test an alternative with a low cost Kepler corrector.
Our setup :
- T60 : NewtonD600/F2000
- Alpy 600 with Kepler corrector (ref : KE244 à « La Clef des Etoiles »)
- main cam : Atik428EX bin1x1
- guide cam : Atik314
Because of very poor weather condition we only had one good night for observation. Our work has been focused on Be stars to facilitate comparison with reference results already stored in the BESS data base.
As a first example , the graph below shows our result on V1026 Sco (A8Ve / mv8.8 / 23° above horizon at time of observation). The reference (blue curve) is from C.Buil /Alpy600+Atik460 (only Bess low resolution data available in the data base for this star : _v1026sco_20130420_055_cbuil). This reference has a better definition than our own result (at R370 estimated by Isis). A zoom on Halpha region provide a more detailed view. However, in overall, the use of that low cost Kepler corrector appears to be an acceptable alternative to the Paracorr.
Collaboration between T60 spectro teams is providing an excellent working place for progress..:-). Thank to all ! Thanks also to Valérie Desnoux for help on BeSS and to my team partner Frederic Pastor excellent to pilot the T60 telescope (not an easy task in spectro...) !
Any question or comment is more than welcome.
Cheers,
Daniel
Attachments
our result vs Bess C.Buil example
our result vs Bess C.Buil example
Post Reply