NGC 1333 LRGB – Gimp postproduction

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An attempt of astronomic photography postproduction using Gimp, made easy by excellent data quality retrieved from SPA-1-CCD Telescopelive network focused about NGC1333 and IC348.

Previous PixInSight processing made, generating an LRGB deconvoluted, denoised, starless/stars pre-elaboration, starless + 0,75% stars pixelmath integration before .tiff exporting and Gimp postprocessing.

C/2020 F3 Neowise 08/08/2020 ZTF data

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This incredible beautiful set of data from IRSA / ZTF retrieval system allows me to a second post-production attempt focused about Neowise comet of 2020.

I still cannot get rid of comet registration alignment by PixInSight, thus just played a hand allineation or R(zr) G(zg) and B(zi) channels in photohop of comet starless image, and then adding stars as new layer in “screen” blending mode.
After some research about Palomar 48 inches Samuel Oschin Schmidt telescope and ZTF camera I found here :

and especially here :  ]
all data necessary for letting PixInsight plate solving and annotates final image.

Apart of aesthetic results, what is important is that if pixinsight works in annotation after platesolving, I hypothesize it could works also in comet registration after a proper platesolving of single channels masterframe; I’m going to try asap.

C/2020 E3 Neowise 24/07/2020 ZTF data

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Thanks to Taras Prystavski contribute on Astrobin forum ( ) I retrieved from IRSA resource all available data from ZTF telescope focused about Neowise comet; cfr. IRSA / ZTF –

PixInSight had some problem in platesolving because of peculiar fits header, thus also was impossible to perform image registration > comet registration.
I thus worked just by star registration of the few subframes and then play an image integration for each filter: I assigned R channel to zr filter, G to zg and B to zi even I suspect other choose may be taken.
After that I made starless and star version for each channel and integrate in pixinsight the starry master, and in photoshop the starless master handly stacking rgb comet.

I finally played some photoshop tricks for pixel fixing, framing, dust lanes enhancing, etc…
I would like a more wider field of view for a next attempt, but I confess to me is simply exciting and so so funny to make post-production over these enormous scientific quality data from such powerful instruments! As when I play with JWST or Hubble data (cfr. )  I’m simply totally stoked!
Thanks again to Taras!!!

IC 2574

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IC 2574 in HaR OiiiG OiiiB, William Optics Redcat 51, ASI1600mm Pro at Bin1, -20C: RGB subframes of 60″, Ha and Oiii subframes of 180″

Ha is used as integration of R channel, Oiii as integration of G and B channel by PixelMath, PixInSight.

IC 2574 (Coddington’s Nebula) – Intermediate Spiral(SABm) Galaxy in Ursa Major, an intermediate Spiral(SABm) Galaxy in the Ursa Major constellation, situated at about 17.000 Ly from us, appears close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere.

It is an outlying member of the M81 Group and is currently forming stars; a UV analysis showed clumps of star formation 85 to 500 light-years (26 to 150 pc) in size.

M8 region in HaS H O

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M8 region from Australia, Heaven’s Mirror Observatory, Takahashi FSQ-106ED (106 mm) F3.6 telescope, QHY 600M Pro CMOS camera at -15 C ( )


Telescopi O Obiettivi Di Acquisizione Takahashi FSQ-106ED

Camere Di Acquisizione QHYCCD QHY600 Pro M

Montature Software Bisque Paramount MX+ GEM

Filtri Astrodon H-alpha 3nm 50×50 mm · Astrodon OIII 3nm 50×50 mm · Astrodon SII 3nm 50×50 mm

Software Adobe Photoshop · Pleiades Astrophoto PixInsight

Camere Guida Starlight Xpress Ultrastar M

 Dettagli d’acquisizione

Date:02 Aprile 2023 ·  05 Aprile 2023Pose:

Astrodon H-alpha 3nm 50×50 mm: 8×300″(40′) -15°C bin 1×1
Astrodon OIII 3nm 50×50 mm: 2×300″(10′) -15°C bin 1×1
Astrodon OIII 3nm 50×50 mm: 4×300″(20′) -16°C bin 1×1
Astrodon SII 3nm 50×50 mm: 10×300″(50′) -15°C bin 1×1Integrazione:2hGiorno lunare medio:12.70 giorniFase lunare media:93.27%

Luoghi: Heaven’s Mirror Observatory – Yass, North South Wales, Australia, Manton, NSW, Australia

NGC3324 in SHO (Hubble) palette

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NGC3324 in SHO palette, from El Sauce Observatory, Chile – Planewave CDK24 610/3962, Proline 9000

.fit BIN1 and BIN2 calibrated frames from Telescopelive, from 29/04/2020 to 17/06/2022

Barnard 33 and half Barnard’s Ori loop

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Horsehead, M42 Orion nebula region and half Orion loop

C2022 E3 ZTF 31/12/2022

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Comet ZTF from Telescopelive network, telescope Takahashi FSQ-106EDX4 of Almeria, Spain, camera Proline FLI PL16083, 31/12/2022


IC1396 SHO Palette

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IC1396 in SHO narrowband, Hubble palette. Star integration by pixelmath (pixinsight) .75* on starless


Telescopi O Obiettivi Di Acquisizione: William Optics Redcat 51
Camere Di Acquisizione: ZWO ASI1600MM Pro
Montature: Sky-Watcher EQM-35 ×
Filtri: Astronomik H-alpha CCD 6nm · Astronomik OIII CCD 6nm · Astronomik SII CCD 6nm
Accessori: ZWO ASIAIR Pro · ZWO EAF · ZWO EFW 8 x 1.25″ / 31mm
Software: Pleiades Astrophoto PixInsight
Telescopi, Obiettivi Di Guida: QHYCCD Mini Guide Scope
Camere Di Guida: ZWO ASI120MM Mini
Dettagli d’acquisizione
Date: 27 Maggio 2021 · 31 Maggio 2021 · 01 Giugno 2021 · 03 Giugno 2021 · 09 Giugno 2021 · 14 Giugno 2021 · 15 Giugno 2021 · 17 Giugno 2021 · 22 Giugno 2021 · 26 Giugno 2021 · 27 Giugno 2021 · 28 Giugno 2021 · 29 Giugno 2021 · 30 Giugno 2021 · 01 Luglio 2021 · 05 Luglio 2021 · 06 Luglio 2021 · 07 Luglio 2021 · 08 Luglio 2021 · 09 Luglio 2021 · 12 Luglio 2021
Pose: 379×300″(31h 35′) (gain: 180.00) -15°C bin 1×1
Integrazione: 31h 35′
Dark: 33, Flat: 33, Dark dei flat: 33
Giorno lunare medio: 18.63 giorni
Fase lunare media: 44.81%
Scala del Cielo Scuro Bortle: 6.00
Centro AR: 21h39m17s.23, Centro DEC: +57°28′09″.9

Campionamento: 3,151 arcsec/pixel

Orientazione: 60,684 gradi

Raggio del campo: 2,554 gradi

IC348 SHO Dynamic Narrowband Combination

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According to Andre B. [ ] who in turns referred to The Coldest Night [ ] narrowband channels integration and combination is subjective and could not coincide with a simple channel combination of Sii Ha and Oiii masters within an RGB implementation, as also suggested by Edoardo Luca Radice during CEDIC 2019; cfr. “Creating near true color images for nebulae from narrow band data using PixInsight” [ ]

In my approach and attempt I used PixInSight > Pixelmath formula

R = (Oiii^~Oiii)Sii + ~(Oiii^~Oiii)Ha
G = ((OiiiHa)^~(OiiiHa))Ha + ~((OiiiHa)^~(OiiiHa))Oiii
B = Oiii

to generate IC348 integration and postproduction.

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