spectro-aras.com

My telescope is all reflecting (newtonian) so no chromatism problem.

Good point re atmospheric dispersion. regarding airmass lookup of uncatalogued objects, if it cannot lookup an object on simbad, ISIS asks if it should use the coordinates which have been entered on the misc/airmass lookup tab. note that the date entered on the airmass lookup tab are not used, airma...

yep, saw that Atel. did you manage to take a spectrum also, or is it in an unfavourable RA in terms of sun distance?

welcome Gord. I strongly recommend that you try getting up to speed with ISIS or SpecInti as they do provide excellent tools for processing multiple sub exposure spectra at once, and with a little extra work automatic airmass calculation and intrinsic instrumental response correction. The only gripe...

Yes of course glass reflective is easier to keep clean since the actual slit is in the dust free internal part of the spectrograph. The idea of air slit is just as a later possible improvement, since a 70-100 micron gap and the internal focal reduction makes it feasible. I see that the alpy foil pla...

https://www.wis-tns.org/object/2022tqu per the Atel, measured magnitudes were 13.25 and 13.29 using the Canadian 0.15m NEOSSat telescope. So, a bit faint for now but perhaps it is on the way up. no spectra reported yet so a chance for someone on the forum to measure and confirm it. RA/Dec 06:01:57.3...

Hi Robin, thanks for the constructive input. To paraphrase the old saying about birds and bushes, fair call on the fact that a useable proven instrument in the hand is worth two (or more) prototypes on the workbench. :-) Indeed, an alpy600 (or modified per your alpy200) is the model of solid and sta...

I am thinking of building a spectrograph optimised for long focus, large aperture, high f ratios, for C14 but also possibly to attempt to convince AAVSO to install on the UC Mt John 61cm f16 Optical Craftsman fork mounted cassegrain telescope, optimised for faint transients, as deep as possible. Jus...

Hen 4-129 from last night. I don't have expertise to make classification of it but have submitted the fits file to Francois and Jaroslav.

thanks Nacho.

That is a well written guide for users of your facility. I was thinking more in terms of a quick reference checklist/flow chart card to keep handy when making a set of observations. I will draw something up and post here.