
brownrb1
Member-
Content count
19 -
Joined
-
Last visited
-
Country
United States
Community Reputation
0 NeutralAbout brownrb1
-
Rank
Inactive member
-
brownrb1 started following Making Progress With ISIS-But?, Atik ACIS7.1 Camera For Spectroscopy, Success With Demetra and and 3 others
-
At some point I will upgrade to another camera for spectroscopy. Would the Atik ACID7.1 be a good choose? Dick
-
Vega08082020.pdf I was able to attach the profile using REPLY. Dick
-
Hi, I finally was successful in using Demetra in acquiring and doing the data reduction of a star, which, not surprising, was Vega. My main obstacle, before, was calculating the SMILE in the GEOMETRY section, but it worked this time. When I did the RESPONSE the IR didn't look quite right, but otherwise things seemed to work. I wanted to attach a copy of my profile, but when I clicked CHOOSE FILES nothing happened. It was the first time that I used the guiding module and my mount was tracking well enough that Vega stayed in the slit during the entire exposures, which were 5-15 s frames. To get the exposure I took single exposures and increased the time until I got an over saturation warning and then decreased to the last exposure time. My focusing could have been better. I then tried Beta Lyrae, since I was in the neighborhood, got a couple of under exposed spectra, and no success doing the data reduction. Again, since I was in the neighborhood, I got a quick shot of M 57 and was not able to use Demetra to get a profile, but used RSpec with some success. It was a bit noisy, exposure off, but my first spectrum capture of an extended object. Next on my list is learning to use PHD 2 to help in tracking. Thanks Dick
-
Wavelength Off With Demetra Profile
brownrb1 replied to brownrb1's topic in Spectroscopy and photometry
Hi, I think you're correct-I spent today setting up and focusing my guiding module. Dick -
Wavelength Off With Demetra Profile
brownrb1 replied to brownrb1's topic in Spectroscopy and photometry
Hi Again, While I like my Atik Infinity for images , the resolution is not that great. I was thinking that I use my ZWO 178 mono for calibration and the Infinity for images and see how that works. Dick -
Wavelength Off With Demetra Profile
brownrb1 replied to brownrb1's topic in Spectroscopy and photometry
Hi Nicolas, Attached is 1 of 6 images of P Cyg and the 1 image of Alpy calibration images. I also got 7 bias frames, darks, and flats. Dick pcyg_A_Object_60s_20200809_051952-2.fit vega 2_Calibration_120s_20200729_162339-1.fit -
Wavelength Off With Demetra Profile
brownrb1 replied to brownrb1's topic in Spectroscopy and photometry
Hi Again, Here's a profile of a spectrum I got last night and when I did the data reduction the same thing happened with 'Geometry' but the wavelength seems to be fairly close. Dick Vega_4.pdf -
Wavelength Off With Demetra Profile
brownrb1 replied to brownrb1's topic in Spectroscopy and photometry
Here's thw Calibration screen Calibration.pdf -
Wavelength Off With Demetra Profile
brownrb1 replied to brownrb1's topic in Spectroscopy and photometry
Hello Nicolas, Thanks for you input. I've just started using Demetra and really like it. I was our last night and used Demetra to get some spectra using it to get correct exposure and focusing work well. I use a 10" Meade SCT with f/6.3 reducer, Atik Infinity monochrome camera and the Alpy Calibration module. I'm not comfortable using the guiding module yet , so I used the small slit to get my bias frames, darks, flats, and calibration and put them in a file. I use the 3mm hole to get my spectra. When I do the data reduction and get to "Calibration" I click "Geometry", then 'Tilt'-"Calculate"-"Detect" and that works fine. I the do "Smile"-"Calculate"-and when I click"Detect" a screen shows 'Warnin-Invalid Search' I then enclose one of the bright vertical line and then"Preview" and nothing happens. I run them anyway and get yellow warnings. I checked "Calibration"->"Run" and it said "Image wavelength correct" and the Calibration srceen is attached Thanks Again Dick Calibration.pdf -
Hi, I've just started learning Demetra to reduce my data and get spectra profiles. I had previously posted a profile of Vega and, attached here, a profile of Beta Lyrae. In both cases, the wavelength of absorption and emission lines were off. What could I do to correct this? Thanks Dick
-
Vega (1) .pdf Hi, After correcting some glitches with my Alpy-Camera I imaged a spectrum of Vega the other night and got my Masters and calibration from Alpy calibration module. I think that I will enjoy using Demetra to do data reduction. Hopefully I will be out tonight and get spectra of various stars and use Demetra to get their profiles. Attached is a screenshot of the profile of Vega. Thanks Dick
-
Hi Olivier, Attached are 2 raw images-a 10 s expoure and a 60 s exposure. Both are from Shelyak calibration. Thanks Again Dick
-
Sorry-pressed wrong key-correct one was entered and can be seen above this one. Dick
-
I've been trying to learn how to use the ISIS program to do data reduction on my spectra and have been making some progress. When I get to PROFILE I get this profile (which is attached) of spectrum from my Alpy calibration lamp. I acquired the calibration spectrum using different exposures - 10s, 20s, 60s, and 120s. This profile is from 10s exposure, but they are all about the same. I use an Atik Infinity monochrome camera. The resolution of the profile is not what I expect. been