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 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. https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html ) I’m simply totally stoked! Thanks again to Taras!!!
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 from Australia, Heaven’s Mirror Observatory, Takahashi FSQ-106ED (106 mm) F3.6 telescope, QHY 600M Pro CMOS camera at -15 C ( Telescopelive.com )
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
IRAS 20324+4057 Hubble Space Telescope, ACS/WFC, filters f606W, f658N, f814W Calibrated .fit data retrieved from MAST – Mitsuki Archive for Space Telescopes https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html Very hard postproduction for hot pixel removing and color rendering of this incredible beauty.
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:
