spectro-aras.com

About Iot CrB (MILES) variability (...that I also started to use...):

SIMBAD -> Iot CrB -> "References (260 between 1850 and 2022) (Total 260) ", 1850 - now, second article:

"TESS survey of rotational and pulsational variability of mercury-manganese stars. "
https://academic.oup.com/mnras/article ...

Nice serie, Christophe!
Let me extend yours with my time serie (exceptional weather): All normalized for the 6520-6530A range.
Cheers,
Peter

Robin Leadbeater wrote: Your titles say 2400 grating and R~3300. Is this correct (600 grating?)

Sorry, I've overlooked an old value in ISIS -> Gnuplot -> double plot (has to be filled manually), should have been 600/mm grating.
The .fit headers are correct.
Clear skies,
Peter

An idea of the actual magnitude, the object seem faint last night ?

Christian
I've been taking spectrum on the night before yesterday, and it was hard to guide on the star (was just thinking about switching to offslit guide):
novaher2021_Halpha_change.png
My signal has halved on the raw images ...

Etienne,

At the time when UV is correct, can you also please check the green and IR-end regions? (preferably with a target star, using eShel spectra for a comparison)
Green range is hard to check without target star, because calibration lines are weak and blended... so we won't even get a proper ...

Nice results Christophe, let me extend the H-alpha serie: The daily cadence looks reasonable.
Got rainy days, please continue!
Peter

Hello,

Sorry for not answering sooner, been busy with more people contacting in private and discussing stuff.
To establish a result-based decision, I've found one of my earlier observation session suitable: I've made a full night observation of Gam Cas around He I 4471 to repeat an earlier known ...

Hi Benji,

Currently I'm evaluating 2 software (spcAudace and SpectroCalc2) for use, so far only by reading the specs and maybe doing quick experiments (more time only at weekends).
I don't rush, and I'm a slow learner.

The SpectroCalc2.pdf manual tells about exactly my need, so easy to understand ...

Benji,

That method is still not the best for precision, because there are times when the shifts are nonlinear - which Robin noted here in this thread:

http://www.spectro-aras.com/forum/viewtopic.php?f=8&t=2697#p15228

e.g. Gam Cas, HeI 6678, R~17000: I typically do these exposures (6 x 10 minute ...

Benji,

If I'm reading the calibration method correctly, there are only 2 calibration frames requested by Pipeline 2a for 1 target (via google translated link):

" 4. Pipeline Calculation Options
...
Calibration with several lamp spectra:
To even better manage the mechanical deformation of the ...