Getting plate-solving status, please wait...
Vega Spectrogram, 



    
        

            Joel Shepherd
Vega Spectrogram, 



    
        

            Joel Shepherd

Vega Spectrogram

Getting plate-solving status, please wait...
Vega Spectrogram, 



    
        

            Joel Shepherd
Vega Spectrogram, 



    
        

            Joel Shepherd

Vega Spectrogram

Imaging telescopes or lenses: TEC 140 APO FL

Imaging cameras: Atik 460EX Mono

Mounts: Astro-Physics Mach1GTO

Guiding cameras: Lodestar X2

Focal reducers: TEC FRC (.9 reducer + FF)

Software: Field Tested Systems RSpec  ·  Sequence Generator Pro

Filters: Paton Hawksley Education Ltd Star Analyser 200

Accessory: QHYCCD OFF AXIS GUIDER


Dates:June 16, 2020

Frames:Paton Hawksley Education Ltd Star Analyser 200: 1x1" (1") -10C bin 1x1

Integration: 1"

Avg. Moon age: 25.03 days

Avg. Moon phase: 21.19%

Bortle Dark-Sky Scale: 6.00

Temperature: 14.00


Basic astrometry details

Astrometry.net job: 3619330


Resolution: 1342x714

Locations: Home, Seattle, WA, United States

Data source: Backyard

Description

I've started tinkering with spectrography: this is the first decent spectrogram I've been able to capture. Vega is a type A0v star which (I am told!) is a good starting point thanks to its very strong Balmer lines which delineate wavelengths of hydrogen absorption. The pretty rainbow and curve is the spectrograph that I captured. The blue lines are a reference spectrum for A0v-type stars. The noticeable dips in both spectras indicate (primarily) hydrogen absorption: H-alpha, H-beta and so on. One reason the shapes of the two curves are so different is that I haven't calibrated mine for instrument response (sensitivity at different wavelengths). That'll come later: the absorption lines are easy to pick out nonetheless.

It's definitely a bit of a different sport from "ordinary" astrophotography: focusing is much more manual, exposure times are much shorter, you can stack exposures though I didn't here, Processing (in RSpec, here) is fairly quick. The analysis afterwards is the interesting part.

Actual exposure time was 0.225 seconds: for such a bright star, the exposure needs to be quite short so as not to saturate any part of the spectrum.

Comments

Histogram

Vega Spectrogram, 



    
        

            Joel Shepherd

In these public groups

Spectroscopy