Starbash Images

Semiautomatic (beta) image workflows by Starbash

Starbash targets by geeksville Hosted on GitHub Pages — Theme by mattgraham

M 13

Processing summary

Coordinates: RA 250.65417 / Dec 36.394167

M 13

M 13

Workflow

The stages used to process this target, with each stage’s parameters:

Parameters: grey = recipe default · amber = this target’s override
  • master_dark siril Generate master dark
  • master_bias siril Generate master bias
  • master_flat siril Generate master flat
  • light_vs_bias siril Extract OSC light calibrated vs bias
    • options = "-cfa -equalize_cfa"
  • light_vs_dark siril Extract OSC light calibrated vs dark
    • options = "-cfa -equalize_cfa"
  • light_no_darks siril Calibrate OSC lights that have no dark frames available
    • options = "-cfa -equalize_cfa"
  • stack_osc siril Basic OSC stacking (no fancy narrowband extraction)
    • registration = "rej w 3 3"
    • filtering = "-filter-wfwhm=80%"
    • drizzle = ""
    • options = "-norm=addscale -output_norm -rgb_equal -32b"
    • framing = "max"
  • seqextract_haoiii siril Extract OSC HaOiii channels
  • stack_dual_duo python stack Stack OSC dual duo (HaOiii + SiiOiii) filter data: with separate Ha, Oiii and Sii channels
    • drizzle = "-drizzle"
    • framing = "cog"
    • filtering = "-filter-wfwhm=80% -filter-round=80% -filter-bkg=80%"
  • stack_single_duo python Stack OSC single duo (HaOiii) filter data: with separate Ha and Oiii channels
    • drizzle = "-drizzle"
    • framing = "cog"
    • filtering = "-filter-wfwhm=80% -filter-round=80% -filter-bkg=80%"
  • background graxpert background Do background subtraction with graxpert
    • smoothing_option = 0.5
    • ai_version = "1.0.1"
  • deconv-obj graxpert deblur skipped Do object deconvolution with graxpert
  • blur_exterminator rc-astro deblur Sharpen/deconvolve with BlurXTerminator (rc-astro bxt)
    • sharpen_stars = 0.5
    • sharpen_nonstellar = 0.5
  • denoise skipped Do denoising with graxpert
  • noise_exterminator rc-astro denoise Denoise with NoiseXTerminator (rc-astro nxt)
    • denoise = 0.9
    • denoise_intensity (no default)
    • denoise_color (no default)
    • denoise_hf (no default)
    • denoise_lf (no default)
    • denoise_intensity_hf (no default)
    • denoise_intensity_lf (no default)
    • denoise_color_hf (no default)
    • denoise_color_lf (no default)
    • frequency_scale (no default)
    • iterations = 2
  • palette_sho siril SHO palette: R=Ha, G=Sii-or-synthetic, B=OIII
    • ha_weight = 0.4
    • oiii_weight = 0.6
    • green_strength = 2
    • blue_strength = 2.0
    • red_suppression = 0.3
  • palette_hoo siril HOO palette: R=Ha, G=OIII (optionally blended with Ha), B=OIII
    • green_ha_weight = 0.0
  • starnet starnet skipped Star removal with StarNet via Siril
    • params = "-stretch"
  • veralux python Do VeraLux HyperMetric Stretching
    • background = 0.1
    • log_d = 0.0
    • protect_b = 6.0
    • star_recovery = 3.5
    • color_grip = 1.0
  • merge_stars siril Screen-blend the removed stars back into the stretched starless image
    • stretch = 1000.0
  • thumbnail siril Generate a stretched thumbnail image
    • size = 1600
    • quality = 95
  • crop python Crop and rotate stacked FITS outputs
    • crop_width = "60%" (default "80%")
    • crop_height = "60%" (default "80%")
    • rotate_deg = 0
  • report_stack_osc python Record per-frame registration metrics for basic OSC stacks
    • seq_basename = "r_osc"
  • report_duo python Record per-frame registration metrics for duo stacks
    • seq_basename = "r_all_ha"
  • palette_broadband siril Broadband palette: load the denoised broadband stack and save it as broadband.fits
  • astro_color_stretch astro-color-stretch (ACS): per-channel zero-sky black point, stretch, colour restore
    • stretch_type (no default)
    • rootiter (no default)
    • rootpower (no default)
    • rootpower2 (no default)
    • asinhiter (no default)
    • k1 (no default)
    • k2 (no default)
    • logiter (no default)
    • log_k1 (no default)
    • log_k2 (no default)
    • skylevelfactor (no default)
    • zeroskyred (no default)
    • zeroskygreen (no default)
    • zeroskyblue (no default)
    • rgbskyzero_method (no default)
    • ulx (no default)
    • uly (no default)
    • win_width (no default)
    • win_height (no default)
    • win_frac (no default)
    • scurve (no default)
    • color_correction_type (no default)
    • colorenhance (no default)
    • gamma (no default)
    • hsv_adjust (no default)
    • hue_adjust (no default)
    • sat_adjust (no default)
    • val_adjust (no default)
    • vib_adjust (no default)
    • setmin (no default)
    • setminr (no default)
    • setming (no default)
    • setminb (no default)
    • wb_mode (no default)
    • temp (no default)
    • tint (no default)
    • ca_correct (no default)
    • vn_correct (no default)
    • vn_strength (no default)
    • lg_correct (no default)
    • lg_strength (no default)
    • star_reduction (no default)
    • reduction_strength (no default)
    • rl_deconvolve (no default)
    • rl_iterations (no default)
    • psf_sigma (no default)
  • grax-denoise graxpert denoise Do denoising with graxpert

View processing workflow

Sessions

2025-07-12

Focal length Focal ratio Image scale
250 mm — 2.39 arcsec/pixel
Equipment Model
camera Seestar S50
telescope S50_153dd4e2
filter IRCUT

Session timeline

2025-07-17

Focal length Focal ratio Image scale
250 mm — 2.39 arcsec/pixel
Equipment Model
camera Seestar S50
telescope S50_153dd4e2
filter IRCUT

Session timeline

2025-08-25

Focal length Focal ratio Image scale
494 mm — 1.57 arcsec/pixel
Equipment Model
camera ASI2600MC Duo
telescope OnStep
filter None

Session timeline

2026-07-03

Focal length Focal ratio Image scale
983.0 mm f/7.5 0.79 arcsec/pixel
Equipment Model
camera ASI2600MC Duo
telescope Ascar 131F
filter None
filterwheel ZWO EFW 5x2 Filter Wheel

Session timeline