Faint Objects
- Capture at least 5x15mins, ideally 20 mins, max gain
- Stack in nebulosity and save as FITS
- Debayer (RGGB, VNG) in pixinsight then, rotate, crop
- denoise – channel extract L, use as inverted mask, run atrous 4-5 times, save as 16-bit TIFF
- Process in RSpec
- Load, subtract background
- Calibrate – 5.83A/pix on the H183c+RC8
- Crop <4000 and > 7000
- Instr Adjust.
- To create instrument response curve for the current night:
- image A or F class star at in the same part of the sky as your target.
- Load star spec into Rspec and calibrate using well-known lines.
- Load smoothed ref spec of correct class as Reference.
- Delete <4000 and >7000, divide main by ref.
- Move back to main, then smooth and save Ref as Inst Resp curve for today along with your spectra.
- To create smoothed ref spec
- Load reference spectrum into RSpec, crop <4000 and > 7000
- delete absorbtion lines, fit spline through data
- save ref as SmoothedA3V or whatever in the UserData directory.