This incredible beautiful set of data from IRSA / ZTF retrieval system https://irsa.ipac.caltech.edu/frontpage/ 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 : https://www.ztf.caltech.edu/ztf-camera.html
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.
PixInSight workflow to get starless and star separated masters by Starnet2 from SHO channel combination integration, this latter used as luminance level; files not stretched hereby available:
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.
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.
M81 and M82 mosaic field at F360 (William Optics Zenithstar 61 / EOS550d) PixInSight platesolving and annotation of Galaxies and DSO. Drizzle data integration of many frames at ISO400, 600sec with CLS (Svbony) and UHC (Optolong) 2″ filter.
Telescopi o obiettivi di acquisizione: Williams Optics Zenithstar 61 APO Camere di acquisizione: Canon EOS 550D Full Spectrum ir cut Montature: Skywatcher EQ35M Telescopi o obiettivi di guida: SVBONY SV106 60mm Guidescope Camere di guida: QHYCCD QHY5L-II-C Riduttori di focale: William Optics Adjustable Flattener Flat61 Software: Adobe Lightroom · Astroberry · Pleiades Astrophoto PinInsight · KStars Ekos/INDI, Astroberry OS · Photoshop · Stark Labs Phd2 Filtri: SVBONY CLS 2” Accessorio: SVBONY Filter Wheel 2″
Date:18 Gennaio 2021 Pose: SVBONY CLS 2”: 22×30″ ISO3200 SVBONY CLS 2”: 7×600″ ISO400 bin 1×1 Integrazione: 1.4 ore Dark: ~17 Flat: ~17 Dark dei flat: ~17 Bias: ~17 Giorno lunare medio: 5.24 giorni Fase lunare media: 27.97%
Telescopi o obiettivi di acquisizione: Williams Optics Zenithstar 61 APO Camere di acquisizione: Canon EOS 550D Full Spectrum ir cut Montature: Skywatcher EQ35M Telescopi o obiettivi di guida: SVBONY SV106 60mm Guidescope Camere di guida: QHYCCD QHY5L-II-C Riduttori di focale: William Optics Adjustable Flattener Flat61 Software: Adobe Lightroom · Astroberry · Pleiades Astrophoto PinInsight · KStars Ekos/INDI, Astroberry OS · Photoshop · Stark Labs Phd2 Filtri: SVBONY CLS 2”
Drizzle data integration by PixInSight of 11 frames, ISO800 180sec and CLS 2″ filter by Svbony. Canon EOS550d full spectrum IR cut on William Optics Zenithstar61 and Skywatcher EQM35 Pro. Everything guided by Astroberry server on Raspberry Pi4b [8Gb] with Kstars and PHD2. Postprod.: Photoshop and Lightroom
Telescopi o obiettivi di acquisizione: Williams Optics Zenithstar 61 APO Camere di acquisizione: Canon EOS 550D Full Spectrum ir cut Montature: Skywatcher EQ35M Telescopi o obiettivi di guida: SVBONY SV106 60mm Guidescope Riduttori di focale: William Optics Adjustable Flattener Flat61 Software: Adobe Lightroom · Astroberry · Pleiades Astrophoto PinInsight · KStars Ekos/INDI, Astroberry OS · Photoshop · Stark Labs Phd2 Filtri: Optolong UHC 2″ Accessorio: SVBONY Filter Wheel 2″
Drizzle data integration of 2 frames-set, both in UHC 2″ filter by Optolong: 15 lights 23rd 11 2020 and 6 lights on 24th. Postprod.: Photoshop and Lightroom
