Comet Pons-Brooks passing by C27, 13 January 2024.
Comet starless integrations by subframes in LRGB 60″, 3 x each filter. Star integration from RGB.
C27 and surrounding starless layer in Ha Oiii and Hbeta, 180sec subframes, from 2023 spring-summer several sessions; cfr. https://www.astrobin.com/dqa6po/C/
Comet C/2020 ZTF approaching to NGC300 on 2023 October 16th and 17th.
LRGB data integration by 300sec. subframes with Takahashi FSQ-106ED (106 mm) F3.6 and CMOS camera QHY 600M Pro belonging to Telescopelive network.
Comet Leonard C/2021 A1 from iDK Namibia remote telescope, Skygems.
Astrobin: https://www.astrobin.com/w0ah2q/
Very hard but completely stocked within this processing; mosaic is obtained by 4 different kind of imaging, at different binning. BIN2 mosaic in LRGB consisted in 3 framing. one for the comet head, another framing for the middle comet tail, third framing for distal part of comet tail.
Bin1 Luminance set finally integrated within mosaic.
Final star & starless integration in Photoshop, with numerous adjustement layers and pixel fixing needed.
Dataset available for free from Skygem network here: https://forum.skygems-observatories.com/d/104-new-year-present-c2021-a1-data-set
Calibration is not quite easy as Skygems archives missing proper dark for right calibrated masterflat creation.
Comet C/2023 E1 Atlas from Ic Astronomy Observatory, Spain, Takahashi FSQ-106ED (106 mm) F3.6 telescope with CMOS camera QHY600M Pro.
Astrobin: https://www.astrobin.com/ihrzvk/
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
and especially here : https://iopscience.iop.org/article/10.1088/1538-3873/ab4ca2/pdf
[ https://doi.org/10.1088/1538-3873/ab4ca2 ]
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.
Thanks to Taras Prystavski contribute on Astrobin forum ( https://www.astrobin.com/forum/c/group-forums/comets-imaging/c2020-f3-neowise-comet-raw-data-from-remote-hosting/ ) I retrieved from IRSA resource all available data from ZTF telescope focused about Neowise comet; cfr. IRSA / ZTF – https://irsa.ipac.caltech.edu/applications/ztf/?__action=layout.showDropDown&
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!!!
Comet ZTF from Telescopelive network, telescope Takahashi FSQ-106EDX4 of Almeria, Spain, camera Proline FLI PL16083, 31/12/2022
Astrobin: https://www.astrobin.com/r6u9bj/
Telescopelive: https://telescope.live/gallery/c2021-a1-leonard-0
Astrobin: https://www.astrobin.com/z7rxb0/
Astrometry: https://nova.astrometry.net/user_images/7582376#annotated
Astrobin:
Astrometry: https://nova.astrometry.net/user_images/7357487#annotated
Astrobin: https://www.astrobin.com/misrip/
Astrometry: https://nova.astrometry.net/user_images/7310563#annotated
Telescopi O Obiettivi Di Acquisizione: William Optics Redcat 51
Camere Di Acquisizione: ZWO ASI1600MM Pro
Montature: Sky-Watcher EQM-35 ×
Filtri: Astronomik L-1 Luminance UV/IR Block 1.25″ · Astronomik Type 2c Blue 1.25″ · Astronomik Type 2c Green 1.25″ · Astronomik Type 2c Red 1.25″
Accessori: DeepSkyDad Flap Panel (FP1) · ZWO ASIAIR Plus · ZWO EAF · ZWO EFW 8 x 1.25″ / 31mm
Software: Adobe Photoshop · Pleiades Astrophoto PixInsight
Telescopi O Obiettivi Di Guida: QHYCCD Mini Guide Scope
Camere Di Guida: ZWO ASI120MM Mini
Date:29 Gennaio 2023
Pose:
Astronomik L-1 Luminance UV/IR Block 1.25″: 60×60″(1h) (gain: 137.00) -20°C bin 1×1
Astronomik Type 2c Blue 1.25″: 60×60″(1h) (gain: 137.00) -20°C bin 1×1
Astronomik Type 2c Green 1.25″: 60×60″(1h) (gain: 137.00) -20°C bin 1×1
Astronomik Type 2c Red 1.25″: 60×60″(1h) (gain: 137.00) -20°C bin 1×1
Integrazione: 4h
Dark: 33, Flat: 33, Dark dei flat: 33
Giorno lunare medio: 8.19 giorni
Fase lunare media: 58.58%
Scala del Cielo Scuro Bortle: 6.00
Comet C/2022 E3 ZTF
Night of 29/01/2023, group 2 subframes, 60″ x 60 x LRGB; bad weather, partially cloudy and windy.
