I have the LHIRES III. A neon spectrum has to be taken before and after getting the target spectrum. I had been slant correcting both neon spectra, but it then occurred to me that I only need to do it

Here is the BeSS monthly report of January and February 2023 These reports and the archive are available there: http://valerie.desnoux.free.fr/BeSS/ And the summary of February Events of the month… EE

Hi all! I have a focus issue with my Lowspec that I would need some good ideas on, I think. I've been using my Lowspec on a C8 before, and now I have moved it and placed it on a C11 instead, hunting w

Hi I have made a compilation of the latest version of the CALPEC standard data base (StSci / HST) readable with ISIS. About CALSPEC : https://www.stsci.edu/hst/instrumentation/reference-data-for-calib

This question is from my own discussion group: "Do any of you astronomers know the spectrum of the moon, visible and invisible to the human eye? How does the ultraviolet proportion compare with that o

On the Shelyak side, we are in the process of seeing if it would be interesting (or not) to release an ALPY 200 or ALPY 300 (R=200 or R=300) and so already as a survey, could you tell me if such a spe

Hello, Although I have been following the forum for some time, I decided to introduce myself, and to present some results obtained with the Spec3K spectrograph (LowSpec with some modifications). First

The attached document contains various things that have caught my eye while using the English version of specINTI, from trivial typographical errors to more serious problems. I hope this will serve to

Hi! I've run into some problems with a series of images of Z Cam: I am processing a series of images, where I had restart the process midway through, resulting in some images to have the spectrum at a

Just want to let you know that I've just uploaded the updated version of the LOWSPEC spectrometer. This version has an improved slit holder which will ensure that the whole slit length can be used. It

I'm copying Derek's message for the benefit of the members. Ken Today is the 2nd anniversary of the fall of the Winchcombe meteorite. My article by the RSC, who made the video and guided me with the a

Hi everyone! I just published a video about spectroscopy and Star'Ex to my YouTube channel, in English. Check it out: https://www.youtube.com/watch?v=H0HJO7Oe9bM. This is just an introductory video de

I am trying to use the function "_img_merge" described on page http://www.astrosurf.com/solex/specinti4_en.html to create a calibration frame that includes emission lines at longer wavelengths (shorte

Hi! I have another small issue: In a recent spectrum, I have a bad hot pixel that interferes with the profile. It is not present on my darks, taken the same day, so I don't know what it is - but hot e

Hi all! I have run into a problem with removal of atmospheric lines in Isis. This is the final image when processing AU Cep. As you can see, there are remnants of atmospheric lines, for some reason no

I am gathering my lenses for Paul's LowSpec and of course am trying to save money when i can without compromising the quality of the final instrument. I have seen along this journey, cautions about le

Hello, I read explanations such as: for a selected region snr is = the average flux / standard deviation. I seek an answers as to just what image conditions should or might apply when measuring snr e.

https://www.astronomerstelegram.org/?read=15910 Hi all, I send the spectral profile of the new transient. Thanks Hamish, it's the first spectrum. I entered the date

Hi Umberto, Did you take another observation? It would probably be good to add the date and time of your observation in the title of each plot. There must surely be some other people observing this no