Search found 430 matches
- Mon Jul 25, 2022 4:08 pm
- Forum: Novae
- Topic: Call for observations of the preoutburst phase of T CrB
- Replies: 17
- Views: 9373
Re: Call for observations of the preoutburst phase of T CrB
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....
- Wed Sep 15, 2021 11:16 pm
- Forum: Novae
- Topic: Alert! Nova Cas 2021 mag 9
- Replies: 128
- Views: 141784
Re: Alert! Nova Cas 2021 mag 9
Nice serie, Christophe!
Let me extend yours with my time serie (exceptional weather): All normalized for the 6520-6530A range.
Cheers,
Peter
Let me extend yours with my time serie (exceptional weather): All normalized for the 6520-6530A range.
Cheers,
Peter
- Fri Jun 25, 2021 11:42 am
- Forum: Novae
- Topic: Probable nova in Hercules mag 6.4 !
- Replies: 39
- Views: 25681
Re: Probable nova in Hercules mag 6.4 !
Sorry, I've overlooked an old value in ISIS -> Gnuplot -> double plot (has to be filled manually), should have been 600/mm grating.Robin Leadbeater wrote: Your titles say 2400 grating and R~3300. Is this correct (600 grating?)
The .fit headers are correct.
Clear skies,
Peter
- Thu Jun 24, 2021 3:45 pm
- Forum: Novae
- Topic: Probable nova in Hercules mag 6.4 !
- Replies: 39
- Views: 25681
Re: Probable nova in Hercules mag 6.4 !
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, ove...
- Mon Jun 21, 2021 3:52 pm
- Forum: Spectroscopes and Softwares
- Topic: Calibration ISIS dans le bleu - probleme
- Replies: 2
- Views: 2732
Re: Calibration ISIS dans le bleu - probleme
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 RMS...
- Sun May 30, 2021 1:07 pm
- Forum: Novae
- Topic: Alert! Nova Cas 2021 mag 9
- Replies: 128
- Views: 141784
Re: Alert! Nova Cas 2021 mag 9
Nice results Christophe, let me extend the H-alpha serie:
Got rainy days, please continue!
Peter
The daily cadence looks reasonable.Got rainy days, please continue!
Peter
- Sun Jan 17, 2021 2:06 pm
- Forum: Spectroscopes and Softwares
- Topic: LHires III shifts with long exposures - how to handle?
- Replies: 26
- Views: 13463
Re: LHires III shifts with long exposures - how to handle?
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 phe...
- Mon Jan 04, 2021 10:03 pm
- Forum: Spectroscopes and Softwares
- Topic: LHires III shifts with long exposures - how to handle?
- Replies: 26
- Views: 13463
Re: LHires III shifts with long exposures - how to handle?
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: &...
- Mon Jan 04, 2021 9:51 am
- Forum: Spectroscopes and Softwares
- Topic: LHires III shifts with long exposures - how to handle?
- Replies: 26
- Views: 13463
Re: LHires III shifts with long exposures - how to handle?
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)...
- Sun Jan 03, 2021 8:07 pm
- Forum: Spectroscopes and Softwares
- Topic: LHires III shifts with long exposures - how to handle?
- Replies: 26
- Views: 13463
Re: LHires III shifts with long exposures - how to handle?
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 sp...