Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  56 Cyg  ·  57 Cyg  ·  B349  ·  IC 5070  ·  NGC 6989  ·  Pelican Nebula  ·  The star 56Cyg  ·  The star 57Cyg
IC5070 Pelican Nebula, Jason
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IC5070 Pelican Nebula

IC5070 Pelican Nebula, Jason
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IC5070 Pelican Nebula

Equipment

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Acquisition details

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Description

Weighted batch preprocessor with cosmetic correction, all subs aligned to the best in their filter.

(Selected bottom-up FITS)

Sub-frame selector, reject anything with score less than 67, approved subs separated out into own directory.

1x1 = 1.5 arcsec/pixel

2x2 = 2.99 arcsec/pixel

Gain 0.652

12bit camera res

Ha IC_5070_Light_H_Alpha_600_secs_2020_06_22T00_57_53_006_c_cc

OIII IC_5070_Light_OIII_600_secs_2020_06_26T00_28_51_008_c_cc

SII IC_5070_Light_SII_600_secs_2020_06_29T01_32_37_006_c_cc

Best sub from each filter then used as reference for Alignment and Local Normalisation.

Integration using SSWEIGHT from sub-frame selection for Sub Weights

Muredenoise of integrated images cycle-spin = 48

Gain 1x1 = 0.06

Gain 2x2 = 0.240

Gaussian Noise 2x2 = 24.99 (OIII & SII)

Gaussian Noise 1x1 = 50.65 (Ha)

Combination count SII = 26, OIII= 23 Ha=36

ABE of integrated images subtraction then division.

Align integrated imaged to the best Ha sub

Linear fit to SII (lowest median, can only do at this stage after images resize to Ha size)

dynamic crop on all

channel combination SII,Ha,OIII

correct magenta stars script (amount = 0.8)

90deg clockwise rotation

STF & Histogram stretch

Curves transformation Saturation, L, a, b and c

Luminance mask applied to mask large cloud and expose the 'pool'

Multilayertransform 4 layers, 2,3&4 = +0.1 to sharpen slightly

Curves tweek with same mask

Inverted mask

Curves tweek (L) to bring out dust cloud detail

Comments

Sky plot

Sky plot

Histogram

IC5070 Pelican Nebula, Jason