spectro-aras.com

Hi,

I wrote this message erroneously to another forum in spectro-aras, but I do believe this is the one that ismore fitting.

I am trying to determine the FWHM and SNR using the line profile in ISIS. With the profile on the screen I select the FWHM button from the list on the right side of the ...

Hello,

I have been away from spectroscopy for a few years and am now getting back into it. I went out last night and took some specs of P Cyg and am now trying to process them. I took darks, flats. and bias frames (8 each), created master frames for all, and placed them into a working directory ...

Hi All,

I am having an issue in ISIS when I check the Auto Atmosphere box in the General tab. While processing a spectrum with the Auto Atmosphere box checked, ISIS gets as far as “Divide by atmospheric transmission” and then stops with the error message that the atmo file cannot be found. However ...

Thanks a bunch, Andrew. Looking at all of the graphs, the results appear to be very similar to what I found.

I was puzzled at these results because I have seen posts from other Atik (314 and 460) users claiming their images are so clean that they do not use darks because their images are very ...

I see that the table on this message did not line up. I am trying to scan and attach a file, but my scanner is now giving me fits. More to come.

Hi,

I recently purchased an Atik 460ex camera to replace my ST8Xme. In creating a master cosme file in ISIS I was quite surprised at my results and perhaps I am misinterpreting exactly what the cosme file is telling me. The table below shows a comparison of threshold values vs number of pixels ...

Hi Robin,

Yes, I do know the purpose of flats as you described. I was just wondering if not using flats in the spectral processing routine would have any adverse effects on the final spectrum. I have actually not detected any, but I certainly could be missing something. I do use an IR curve (nearly ...

Hi Robin,

Yes, the IR curve is essentially a straight line. The irregularities occur with or without using the IR curve so apparently they are not caused by any interaction between the IR curve and the flat.

I would like to try your suggestion of running ISIS using the XML file from a previous ...

Hi Andrew,

Yes, I have actually used different flats including the ones I used for each session all with the same results. It does appear as if I am knocking on the door to rectifying this strange behavior, but that door just refuses to open up - at least for now. Your suggestion helped to bring me ...

I may be getting closer to the source of the issue. Andrew, I went through your suggestions and found one I had not tried – the one to retain all images in the processing routine and put them through their paces. Here are the results.

No Flat Used:
Individual @pro1.fit, @pro2.fit, etc files all ...