JWST NIRCam starless and luminance approach for postprocessing

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NGC2070 Tarantula Nebula in Dorado, JWST NIRCAM raw data

After processing James Webb Space Telescope raw calibrated .fit data focused about NGC2070 by Photoshop screen colorized blending layers, with colours assigned according to NIRCAM filters guideline (cfr.: https://jwst-docs.stsci.edu/jwst-near-infrared-camera ) I was able to obtain this preliminary result.

Integration of NIRCAM f090W, f187N, f200W, f335M and f444W filters

According to spectrum values indicated by NIRCAM filters guidelines I decided a different approach for postproduction, considering the lowest nm values as “blue” colour band, the middle nm values as green, and the highest nm as red channel for an RGB combination.

Using Pixelmath I thus combined in PixInSight f090W and f187N masters creating my blue channel, f200W and f335N as the green channel, and f444W master for red channel.

NIRCAM f090W + f187N filter integration (PixInSight > Pixelmath)
NIRCAM f200W + f335N filter integration (PixInSight > Pixelmath)
NIRCAM f444W filter

Being NIRCAM data results of very narrowband recordings, I approach such masters as a peculiar SHO integration, and decided to attempt a starless integration for nebula details and colours work, and final recomposition of starry image using star luminance layer.

Starless version of each master I obtained by PixInSight > Starnet2. Each master I then stretched and export as .tiff in Photoshop for contrast adjustement, star residual removing and hot pixels fixing.

Starless NIRCAM f090W + f187N filter integration
Starless NIRCAM f200W + f335N filter integration
Starless NIRCAM f444W filter

In Photoshop I imported each master into pertinent RGB channel. Then I provide to contrast, saturation and Brightness adjustement layers and fix other pixels problem emerged from channels combination.

Starless LRGB integration where: L=f444W R=f444W G=f200W+f335N B=f090W+f187M JWST NIRCAM NGC2070

Starry NIRCAM f444W filter master as luminance was finally imported as upper layer in luminosity blending mode, while starless f444W master for starless version.

Art, Astronomy, Deep Sky, Dorado, James Webb Space Telescope, JWST, NGC2070, NIRCAM, NIRCAM - Near Infrared Camera, Photoshop, PixInSight, Starless, Starnet, Tarantula Nebula, Xiuart

JWST NIRCam NGC2070 Tarantula Nebula

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James Webb Space Telescope NIRCam NGC2070 “Tarantula Nebula” , filters f090W, f187N, f200W, f335M and f444W

Photoshop screen blending mode and colorizing layers of f090W, f187N, f200W, f335M, f444W master calibrated RAW .fit data of James Webb Space Telescope NIRCAM mosaic photo session focused on NGC 2070.

Astrobin: https://www.astrobin.com/uv9q6w/

Art, Astronomy, Deep Sky, Dorado Nebula, James Webb Space Telescope, JWST, NGC2070, NIRCAM, NIRCAM - Near Infrared Camera, Tarantula Nebula, Xiuart

NGC2359 Thor’s Helmet, SHO Palette – Telescopelive

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NGC2359 Thor’s Helmet in SHO Palette. RAW .fits calibrated file from Telescopelive

Astrobin:

Astrometry:

TelescopeLive: https://telescope.live/gallery/ngc2359-thors-helmet-4

Annotation by PixInSight
Art, ASA 1000/6800 CH-3-CCD, Astronomy, Astrophotography, CH-3-CCD, Deep Sky, El Sauce Observatory, El Sauce Observatory, Chile, Narrowband, NGC2359, Proline FLI PL 16803, Remote Astrophotography, Telescopelive, Thor's Helmet, Xiuart

NGC 1365 Great Barred Spiral Galaxy

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NGC 1365 Great Barred Spiral Galaxy on Planewave CDK24, El Sauce Observatory, Chile

Astrobin: https://www.astrobin.com/n61k17/

Astrometry: https://nova.astrometry.net/user_images/7470441#annotated

Telescopelive: https://telescope.live/gallery/ngc1365-5

NGC 1365 Great Barred Spiral Galaxy

Link: https://www.xiulong.it/tianwensheying/2023/03/06/ngc-1365-great-barred-spiral-galaxy/

Link al TIFF/FITS: https://www.dropbox.com/s/lomf3scyuzq967j/LRGB_lfG_DBEspccDECONVezdenoise.xisf?dl=0

Scarica il file originale:  Scarica

 Strumentazione

Telescopi O Obiettivi Di Acquisizione: Planewave CDK24

Camere Di Acquisizione: FLI PL9000

Montature: Mathis Instruments MI-1000/1250

Filtri: Astrodon Gen2 E-Series Tru-Balance Blue 50×50 mm · Astrodon Gen2 E-Series Tru-Balance Green 50×50 mm · Astrodon Gen2 E-Series Tru-Balance Lum 50×50 mm · Astrodon Gen2 E-Series Tru-Balance Red 50×50 mm

Software: Adobe Photoshop · Pleiades Astrophoto PixInsight

 Dettagli d’acquisizione

Date:29 Gennaio 2021 ·  28 Gennaio 2022 ·  29 Gennaio 2022 ·  01 Febbraio 2022Pose:

Astrodon Gen2 E-Series Tru-Balance Blue 50×50 mm: 8×600″(1h 20′) -25°C bin 1×1
Astrodon Gen2 E-Series Tru-Balance Green 50×50 mm: 8×600″(1h 20′) -25°C bin 1×1
Astrodon Gen2 E-Series Tru-Balance Lum 50×50 mm: 8×600″(1h 20′) -25°C bin 1×1
Astrodon Gen2 E-Series Tru-Balance Red 50×50 mm: 8×600″(1h 20′) -25°C bin 1×1

Integrazione: 5h 20′

Giorno lunare medio: 16.88 giorni

Fase lunare media: 32.18%

Scala del Cielo Scuro Bortle: 1.00

Centro AR: 03h33m23s.864

Centro DEC: -36°04′55″.95

Campionamento: 0,620 arcsec/pixel

Orientazione: -1,195 gradi

Raggio del campo: 0,372 gradi

Trasformazione WCS: thin plate spline

Info:Apri 

 Trova immagini nella stessa area 

Risoluzione: 3056×3056

Dimenzione file: 53,5 MB

Luoghi: El Sauce Observatory, Chile, Coquimbo, Cile

Origine dei dati: Osservatorio remoto di proprietà

Origine dei dati remoti: Telescope Live

 Descrizione

After James Webb Space Telescope MIRI and NIRCAM data, I focused about NGC 1365 Great Barred Spiral Galaxy, and found good calibrated data from Telescopelive archive to be downloaded and elaborated.
Telescope:  Planewave CDK24 610/3962mm (CH-1-CCD)
Camera: Proline FLI PL 9000
Location: El Sauce Observatory, Chile
600″ x LRGB subframes, taken between 28/01/2022 and 01/02/2022

NGC 1365 LRGB, annotated
NGC1365 RGB integration
White Balance values and data after PixInSight > Spectrophotometric Color Calibration
Art, Astrophotography, CHI-1 CCD - Planewave CDK24 610/3962, Deep Sky, El Sauce Observatory, El Sauce Observatory, Chile, Galaxy, NGC1365, Planewave CDK24, ProLine PL09000, Proline FLI PL 9000, Remote Astrophotography, Telescopelive, Xiuart

NGC 1672 Seyfert Galaxy

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NGC 1672 Seyfert type II nucleus galaxy, from CH-1-CCD > Telescoplive .raw data

Astrobin:

Astrometry: https://nova.astrometry.net/user_images/7393327#annotated

Telescope Live: https://telescope.live/gallery/ngc-1672-7

Annotated integration by PixInSight
Art, Astronomy, Astrophotography, CH-1-CCD, CHI-1 CCD - Planewave CDK24 610/3962, Chile, Deep Sky, El Sauce Observatory, El Sauce Observatory, Chile, NGC 1672, ProLine PL09000, Remote Astrophotography, Seyfert Galaxy, Southern Emisphere, Telescopelive, Xiuart

LMC – LARGE MAGELLANIC CLOUD

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Astrobin: https://www.astrobin.com/vmtkrd/

Astrometry: https://nova.astrometry.net/user_images/7363248#annotated

Telescopi O Obiettivi Di Acquisizione: Takahashi FSQ-106ED

Camere Di Acquisizione: FLI PL16083

Filtri: Astrodon Gen2 E-Series Tru-Balance Blue 50×50 mm · Astrodon Gen2 E-Series Tru-Balance Green 50×50 mm · Astrodon Gen2 E-Series Tru-Balance Lum 50×50 mm · Astrodon Gen2 E-Series Tru-Balance Red 50×50 mmSoftwareAdobe Photoshop · Pleiades Astrophoto PixInsight

Camere Di GuidaStarlight Xpress Ultrastar M

Large Magellanic Cloud, (Nubecula Major)
LRGB 300″ and 600″ subframes integration, data retrieved from Telescopelive.com/AUS-2 sessions focused on Large Magellanic Cloud.
Scope: AUS-2 Takahashi FSQ-106ED, cfr. https://help.telescope.live/hc/en-us/articles/360005155197-AUS-2-10cm-F3-6-Refractor [17/02/2023]
Camera: ProLine FLI PL16083, cfr. https://help.telescope.live/hc/en-us/article_attachments/4406735822609/PL16803.pdf [17/02/2023]
Integration and first stretch by PixInSight; final post-production by Photoshop

White Balance values according to PixInSight > Spectrophotometric Color Calibration
Art, Astronomy, AUS-2, AUS-2 Takahashi FSQ-106ED, Deep Sky, HEAVEN'S MIRROR OBSERVATORY, AUSTRALIA, Large Magellanic Cloud, LMC, Nubecula Major, ProLine FLI PL16083, Remote Astrophotography, Telescopelive, Xiuart