Pleiades M45 HD 23643 Star Spectrum
Spectral Atlas and Spectral Classification
Spectral Sequence of Stars Color Chart
Bright Star Spectra Index
Image Information
- The above screen capture the spectra graph was created by
MaxIm DL V5.07
graph window. The pointer indicates the star at
spectral order zero
and the horizontal line is the measurement of the spectra at the blazed
spectral order plus one that is to the right of the star.
- A MaxIm DL V5.07 measurement line is placed on spectral order of plus one and the pixel values are shown in the graph window. The pixel locations along X axis represents the wavelength of the star light. In the graph the short wavelengths are on the left and the long wavelengths are on the right.
- The upper right identification window is from Cartes du Ciel 2.76c
- Field of view of full image: 77 arcminutes wide x 53 arcminutes high
- Image scale of 2.12 arcsec/pix.
- Top image is full size
- North is bottom and west is left
- Exposure: 1 image x 7 seconds per image
- Darks: 45 x 7 seconds per dark frame
- Flats: 32 x 12 seconds per flat frame
- Darks for Flats: 64 x 12 seconds per dark frame
- CCD-TEMP: -25°C
- Tracking, no guided
- Information: Measure Signal to Noise of the background with no stars
- Background average 39.637/background Std Dev 1.523 = Signal to Noise 26.0
Observing Information
- OBS-Location: Camas, WA USA, 16.6 miles East-North-East from the center of Portland, OR
- Image taken through the Vancouver, WA USA sky glow
- DATE-Local = October 10, 2009 at 1:53 am PDT
Imaging Equipment
Imaging Processing
- AIP4WIN V2.2 Series Analysis each image
- Diffraction Limited MaxIm DL V5.07
- Create master dark with SD Mask combine
- Create master flat dark with SD Mask combine
- Create master flat with SD Mask combine
- Calibrate images with master dark and master flat
- Save as FIT
- Screen Stretch to see background noise
- Save as 8-bit TIFF for Photoshop, Stretch, Linear Only, Input Range Screen Stretch, Output Range 8-bit
-
- Adobe Photoshop CS3 10.0.1
- Label stars
- Save as JPG for webpage
The following test pattern is to help you adjust your monitor to best view the CCD astro images.
The test pattern is used for adjusting monitor brightness, and contrast.
Adjust monitor brightness and contrast to see all 16 gray scale levels.
The most important adjustment when viewing astro images is to see the differences in all of the black bands.
© 1998-2010 David Haworth
