JWST NIRCam NGC2070 Tarantula Nebula (Stefano Zamblera)

JWST NIRCam NGC2070 Tarantula Nebula

Revision title: NGC2070 Tarantula Nebula in Dorado, JWST NIRCAM raw data starless and luminance composition

Link: https://www.xiulong.it/tianwensheying/2023/03/14/jwst-nircam-ngc2070-tarantula-nebula/

Link to TIFF/FITS: https://www.dropbox.com/s/xt5g2egoe0ygvsj/TarantulaNebula-JWST-NIRCAM-Bf090Wf187W_Gf200Wf335M_Rf444W.psb

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 filtersAccording 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 filterBeing 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 filterIn 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 NGC2070Starry NIRCAM f444W filter master as luminance was finally imported as upper layer in luminosity blending mode, while starless f444W master for starless version.

Photoshop .psd file with starless, adjustement and luminance layer available here: https://www.dropbox.com/s/xt5g2egoe0ygvsj/TarantulaNebula-JWST-NIRCAM-Bf090Wf187W_Gf200Wf335M_Rf444W.psb

B

Title: NGC2070 JWST NIRCAM f090W

Description: NGC2070 JWST NIRCAM f090W narrowband registred integration

Uploaded: ...

C

Title: NGC2070 JWST NIRCAM f187N

Description: NGC2070 JWST NIRCAM f187N narrowband registred integration

Uploaded: ...

D

Title: NGC2070 JWST NIRCAM f200W

Description: NGC2070 JWST NIRCAM f200W narrowband registred integration

Uploaded: ...

E

Title: NGC2070 JWST NIRCAM f335M

Description: NGC2070 JWST NIRCAM f335M narrowband registred integration

Uploaded: ...

F

Title: NGC2070 JWST NIRCAM f444W

Description: NGC2070 JWST NIRCAM f444W narrowband registred integration

Uploaded: ...

G

Title: NGC2070 JWST NIRCAM f090W, f187N, f200W, f335M, f444W integration

Description: NGC2070 JWST NIRCAM f090W, f187N, f200W, f335M, f444W narrowband masterframes registred integration, here used as luminance for Photoshop postproduction

Uploaded: ...

H

Title: NGC2070 Tarantula Nebula in Dorado, JWST NIRCAM raw data starless and luminance composition

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

Uploaded: ...

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