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Thanks Ken! Luckily, fair (but cold) weather seems to continue here... I hope it's improved for you.

I planned the same observation for today (14 dec). Weather condition are similar.
I'm on the nova that appear brighter than yesterday.

Paolo

Hi all! Real time observation report from central Italy. Sky clear (very rare event!), good transparency and seeing, wind calm, temp 1.5° C, humidity 90%. If clouds or fog don't come, I should observe some NIR regions toward h-alpha line. Lhires III and 600 l/mm grating. Now on the NIR part, O I 844...

Hi all, yesterday observation... Near IR field, Lhires III with 600 l/mm grating. Wratten 25 filter to avoid 2nd order contamination. O I 7773 region http://quasar.teoth.it/html/spectra/novaper2020_20201203_843_PB.png O I 8446 - Ca II IR triplet region (sorry, only one 300 sec frame because of cloud...

Hi all, great spectra! My contribution using Lires III and 600 l/mm grating. H-beta and Fe II region http://quasar.teoth.it/html/spectra/novaper2020_20201126_810_PB.png H-alpha, Fe II and neutral helium http://quasar.teoth.it/html/spectra/novaper2020_20201126_874_PB.png Neutral oxygen and helium, ma...

Hi all, a new version (1.4) that allows you to search target coordinates by providing name (follows a nice suggestion from David!). Excel VBA code internally uses MS Internet Explorer for this work. If you can browse Simbad with IE, the search should work. To start, press the Simbad button to enter ...

Hello everyone! Marco Leonardi and me developed a new version of the spreadsheet. Accuracy is improved with a new algorithm. Starting from J2000 coordinates, precession is now calculated on the chosen date (the old version internally uses static coordinates for Miles stars set to 2014, year it was p...

A paper on the Betelgeuse dimming (optical spectrophotometric based analysis):

Betelgeuse Just Isn’t That Cool: Effective Temperature Alone Cannot Explain the Recent Dimming of Betelgeuse
Emily M. Levesque, Philip Massey

https://arxiv.org/abs/2002.10463

Clear skies,
Paolo

Ciao Tonino, nice to meet you on ARAS forum!
Excellent instrument and spectra... and it's all thanks to you, congratulations!

Paolo

Hi James, nice spectra! I uploaded the original Alpha Ori profiles (six spectral intervals) on BAA database. You find in attachment the Miles division FITS profile I showed in my previous post.

Paolo

Hi Robin, here's the comparison. http://quasar.teoth.it/html/spectra/alfori_20200123_8_Miles_div.png I didn't know you could go so far in the IR with the LhiresIII....did you use an red filter to reject 2nd order spectrum? Yes James. As I said, I used a red filter Wratten 25 to avoid the 2nd order c...