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The center of the Milky Way. Includes the constellations Sagittarius and Scorpius. Numerous star clusters and nebula are shown in addition to the dark dust clouds between Earth and the galaxy core. The beating heart of the scorpion, Antares, a red super giant, shines a bright reddish gold in this image. Also includes several Messier objects, including the larger Ptolemy Cluster (M7), the Lagoon Nebula (M8), and the Sagittarius Star Cloud (M24). Though faint, the red hue of the bright nebula IC 4628 is visible in the tail of Scorpius. Hover your mouse over the image to show identified objects.
Stack of 3x25 secs RAW, ISO 1600 taken with a Canon 50D. Stacked in DeepSkyStacker; processed in Photoshop CS3 using curves and levels adjustments; banding reduction using Astronomy Tools actions from within Photoshop; and final processing using Noise Ninja from within Photoshop.
Taken under dark (Bortle 2) and clear skies at St. George Island, Florida.
90 frames x 2 minutes exposures @ISO6400, using Celestron Nexstar 8SE on CG-5, Starizona field flattener, astromodded EOS550, CLS clip filter, Moonlite focusser, guided with Celestron guidescope with SPC900C guide camera and PHD guiding. BackYard EOS camera control, DeepSkyStacker stacking. Final image processing for levels and gamma in Photoshop. Dark skies, and everything worked for a change - best result so far for a galaxy.
EXIF - L-extreme: 100X120" (3h20min) + Astronomik L-2: 45X120" (1h30min)
Calibration: Flats - 30+30, Darks - 60
Camera: ZWO ASI294MC Pro (cooled to 0°C)
Filters: Optolong L-extreme & Astronomik L-2 Luminance UV/IR Block 1.25"
Main optics: Sky-Watcher Explorer 200P
Mount: Sky-Watcher EQ6-R Pro
Guiding: Artesky UltraGuide 70 + ZWO ASI120MM Mini
Controller: ZWO ASIair Pro
Electronic focuser: ZWO EAF
Software: DeepSkyStacker + Pixinsight + Photoshop
Location: Medviđa, Croatia
Location :CastresmallObservatory (Castres, Tarn - France)
Acquisition Date :2016-06-28
Author :Pierre Rougé
Scope :Newton Orion 200/1000 (f/5) + MPCC Baader
Autoguiding :Skywatcher Synguider (v1.1) & Meade ETX 70/350 mm
Camera :Canon EOS 400D (Digital Rebel Xti) refiltré Astrodon in Side (modded Astrodon in Side)
+ EOS CLIP CLS Astronomik
Exposure :75.0 minutes [15 subexposures of 300 sec each (selected from 15)] @ ISO 800
Calibration :Dark & bias : 6/9 @ ISO 800 - Flat & Dark-Flat : 9 @ ISO 800
Weather :Bonne transparence. Faible vent de E à SE. T=25°C humidité nulle.
Software Used :Astro Photograph Tool (v3.11), DeepSkyStacker, PhotoShop CS
Handful of exposure after New Year. Exposure 90s, 150s & 180s steps each 10 using Canon T4i. Camera Orion 80ED on G11
Processed in Layers after stacking in DeepskyStacker.
[31032017] Komet 41P-Tuttle-Giacobini-Kresák
Fuji X-E1
Fujinon 35mm F1.4@F1.4
10x10s @ISO400/1600/6400
RawTherapee 4.2
Deepskystacker
Fitsworks
Detail of M20 from this shot. I think it came out nicer than M8--being a little higher in the sky helped a bit.
Lens: Nikon 180mm ED AI-s f/2.8, shot at f/2.8
Camera: Canon 6D (unmodified)
Exposure: 123x1min iso400
Filter: None
Mount: Celestron CGEM DX
Captured with BackyardEOS
Registered and stacked with DeepSkyStacker
Photographed from Round Rock TX (Orange zone)
The deformation caused by the lens gives a nice sens of speed on the way to our galactic core.
Pentax K-5 II
smc PENTAX-DA 18-55mm F3.5-5.6 AL WR
72x21 seconds stacked using DeepSkyStacker
Post processing in Photoshop
Celestron Nexstar 130 SLT
Canon eos 10D
39*20 sec.
Dark picture.
Iso 800.
DeepSkyStacker.
Photoshop.
Cropped.
It was cloudy for long time.
This night was clear, but moon was shining. I wanted to test lower iso value, than before, and I think it is much better.
Composite of moon and background stars taken 07APR20 (moon) and 10APR20 (stars). Nikon D780 DSLR camera.
Stellarvue SV105SVFT telescope. Celestron CGX mount. 150X1/200sec subs for moon and 20X10 sec subs for stars. Processed with DeepSkyStacker (moon), Nebulosity 4 (stars), Pixinsight (batch resample) and Photoshop CS2.
Imaging telescope or lens:Explore Scientific 102mm ED CF APO triplet ED 102 CF
Imaging camera:Altair Hypercam 183C
Mount:iOptron iEQ30 Pro iOptron
Guiding telescope or lens:Starwave 50mm guidscope Starwave
Guiding camera:Altair Astro GP Cam 130 mono Altair
Focal reducer:Altair Lightwave 0.8 Reducer/Flattener Altair Lightwave
Software:PHD2 2.6.4, APT - Astro Photography Tool APT 2.43, DeepSkyStacker (DSS) Deepskystacker 3.3.2, Photoshop CC 2017 Photoshop
Filter:Badaar Moon and SkyGlow Badaar
Resolution: 5412x3630
Dates: Sept. 22, 2018
Frames: Badaar Moon and SkyGlow Badaar: 38x300" (gain: 11.00) 14C bin 1x1
Integration: 3.2 hours
Darks: ~30
Flats: ~40
Avg. Moon age: 12.33 days
Avg. Moon phase: 93.45%
Bortle Dark-Sky Scale: 7.00
Mean FWHM: 5.75
Temperature: 11.00
Astrometry.net job: 2268124
RA center: 350.185 degrees
DEC center: 61.203 degrees
Pixel scale: 0.784 arcsec/pixel
Orientation: 98.148 degrees
Field radius: 0.709 degrees
Data source: Backyard
25min total (5x300s@800iso)
UK 31/12/13
Takahashi FSQ106ED f/5
Celestron Advanced Vx Mount Guided
Canon D1100 (modified) CLS filter
BackyardEOS, PHD
Deepskystacker, Photoshop CS6
Comet Iwamoto was at its closest to Earth this morning, so I headed out to dark skies southwest of Brisbane early this morning to photograph it. This is a FAST comet, so even though I only had 20 minutes worth of exposures I had to align them to the comet rather then the background stars,
20 x 60 second exposures at 200mm, f/4 and 3200 iso, stached in DeepSkyStacker and processed in Lightroom.
There is a faint tail visible extending towards 11 o'clock.
This is M33 after a long time of processing. You can see more about this galaxy on Wikipedia.
The original lights came from the evenings of September 18 and the night of September 23-24, 2009
Taken with my Pentax K10D camera with the Stellarvue SV4 scope, operating at Prime Focus. A field flattenter was also used as well as a Baader Moon and Skyglow light pollution filter. Tracking was done with the Orion Starshoot Autoguider using a Stellarvue SV 70 ED. The DLSR in-camera noise reduction was turned off. Most shots were done with using the Pentax remote control software to do bulb interval shots. I allowed about 2 minutes of time between shots to give the camera a chance to cool off and for the batteries to recover.
Most of the darks were recorded well after the lights in an effort to help understand and control the noise that is generated by this camera. I learned that I had to be vigilant regarding IR light getting into the camera when making this library of darks. Also, it appears that the telescope body itself seems to act as a heatsink for this camera, making collecting darks requiring connecting the camera as if it was in the field.
Stacking was with DSS using the below settings:
Stacking mode: Custom Rectangle
Drizzle x2 enabled
Total exposure: 4hrs 42 mins 21s
Stacking step 1 ->2 frames (ISO: 800) - total exposure: 16 mn 4 s
-> Offset: 36 frames (ISO: 800) exposure: 1/4000 s
-> Dark: 40 frames (ISO : 800) exposure: 8 mn 3 s
-> Dark Flat: 36 frames (ISO : 800) exposure: 1/4000 s
-> Flat: 24 frames (ISO: 800) exposure: 1/4000 s
Stacking step 2 ->2 frames (ISO: 800) - total exposure: 20 mn 6 s
-> Offset: 36 frames (ISO: 800) exposure: 1/4000 s
-> Dark: 90 frames (ISO : 800) exposure: 10 mn 5 s
-> Dark Flat: 36 frames (ISO : 800) exposure: 1/4000 s
-> Flat: 24 frames (ISO: 800) exposure: 1/4000 s
Stacking step 3 ->4 frames (ISO: 400) - total exposure: 1 hr 0 mn 20 s
-> Offset: 24 frames (ISO: 400) exposure: 1/4000 s
-> Dark: 18 frames (ISO : 400) exposure: 15 mn 7 s
-> Dark Flat: 48 frames (ISO : 400) exposure: 1/1600 s
-> Flat: 19 frames (ISO: 400) exposure: 1/1600 s
Stacking step 4 ->1 frames (ISO: 400) - total exposure: 20 mn 7 s
-> Offset: 24 frames (ISO: 400) exposure: 1/4000 s
-> Dark: 3 frames (ISO : 400) exposure: 20 mn 9 s
-> Dark Flat: 48 frames (ISO : 400) exposure: 1/1600 s
-> Flat: 19 frames (ISO: 400) exposure: 1/1600 s
Stacking step 5 ->11 frames (ISO: 400) - total exposure: 2 hr 45 mn 44 s
-> Offset: 24 frames (ISO: 400) exposure: 1/4000 s
-> Dark: 11 frames (ISO : 400) exposure: 15 mn 4 s
-> Flat: 19 frames (ISO: 400) exposure: 1/1600 s
Processing was with PixInsight LE 1.0 using the instructions provided by Rogelio Andreo regarding gradient subtraction:
blog.deepskycolors.com/archivo/2010/05/
Further processing was done via the tutorial at this page from David Nash's website:
www.davesastro.co.uk/techniques/pixinsight_tutorial/index...
I'm extremely happy with how this image turned out. I know that there are a few gradients still showing up. Still, this is much better than I've been able to get from what I've always known was good data. The missing bits were getting a library of decent darks and flats and bias frames to give DSS some meat to chew on.
Finally being able to follow what is happening in PixInsight really helps as well.
Now I'll try to fill in the holes in my other data from last year and I'll see what I can get!
Die Plejaden (M45) im Urlaub in Spanien (Empuries) fotografiert.
Pentax K3 II, TS 80/480 mm F6, ISO 100,19 x 300s.
Stacking mit DeepSkyStacker, Bearbeitung am Notebook mit Photoshop.
30 x 10s ISO800
20 darkframes
DeepSkyStacker
Canon XS @ Celestron C6N
Segundo intento de fotografiar orion, di mas tiempo de exp aunque perdiera un poco de definicion (mi montura no tiene un seguimiento correcto)
Promete el asunto :)
DeepSkyStacker: 62 frames X 1 sec, f/2.8, 3200 ISO.
First time trying stacking, I had very little idea what I was doing, but it came out ok. You can see some of the texture of the galaxy, and no star trails (I don't have a tracking mount). I learned a lot for next time I try it, mostly just MORE FRAMES.
Time: 2019. 1. 26. 20:00 ~
Location: Boeun, South Korea (Bortle Dark-Sky Scale: 4)
Optics: Takahashi FS60CB with Flattener(370 mm ƒ/6.2)
Exposure: Sony A7s (Modified) ISO 8000 x 30s x 280 subs (with Dark, Flat, Bias frames)
Filter: Optolong L-Pro filter
Mount: Toast Pro (TP2)
Software: DeepSkyStacker, Astronomy Tools, GradientXTerminator, Adobe Photoshop
Shotdate: 4-12-2013
Camera: Nikon D3x
Optics: 105mm AF Micro Nikkor @ f4
ISO speed: 1600
Subs: 10 x 300 seconds
Calibration: 108 bias, 32 dark and 32 flat frames.
Stacking in DeepSkyStacker and post-processing in PixInsight
The Orion Nebula (M42) is close to Earth in universe scale at only 1,344 light years away. The nebula is visible to the naked eye, even in light polluted areas as a "fuzzy" star in the middle of Orion's sword,, to the south of Orions belt. This nebula is busy forming new planets and stars.
My first astro photography photograph.
Capture Details:
Exposure duration: 38x 120s (1h16m)
ISO: 800
Canon EOS 1100D
AdvancedVX Mount
Sky-Watcher Pro 80ED APO Refractor (600mm Focal Length, 3.1" or 80mm Aperture)
Guider: Orion Magnificent Mini Autoguider
Post processing: DeepSkyStacker + Corel Photo Paint X6
All Star Polar Alignment assistance: @AstroTanja
Auto-guider configuration assistance: @TheAstroShake
Telescopi o obiettivi di acquisizione: Sky-Watcher Equinox 80ED
Camere di acquisizione: QHY8L
Montature: Skywatcher AZ EQ6 GT
Telescopi o obiettivi di guida: Celestron 102mm f/6.6 Achromat
Camere di guida: Magzero MZ-5m
Software: DeepSkyStacker, photoshop, Absoft Neat Image
Accessori: TecnoSky Flattener 1x
Risoluzione: 2988x1962
Date: 13 aprile 2015, 17 aprile 2015
Pose:
60x300" -15C bin 1x1
21x600" -15C bin 1x1
Integrazione: 8.5 ore
Dark: ~57
Flat: ~31
Bias: ~40
Giorno lunare medio: 25.26 giorni
Fase lunare media: 22.65%
Scala del Cielo Scuro Bortle: 3.00
Temperatura: 8.50
Centro AR: 184,572 gradi
Centro DEC: 47,211 gradi
Orientazione: -86,153 gradi
Raggio del campo: 1,603 gradi
Luoghi: Drassa, Corinth, Grecia
Comet c/2012 S1 ISON imaged from my front yard this morning! Note the faint cyan coloring of the comet.
Two "bonus" satellites crossed the field, one smack-dab through ISON's tail and a dim one in the lower left. Just above the middle of the dim one's track is a faint galaxy, NGC 3433. The brightest star is 53 Leonis.
The sky was brightening quickly as I was getting these images, hence the bluish cast in the lower part of the frame.
Camera information:
Nikon D90 camera
Sigma 150-500mm f/5-6.3 DG OS HSM APO Autofocus Lens
Orion TeleTrack GoTo Altazimuth Telescope Mount
Stack of twenty-one 30” exposures, f/6.3, ISO1600
760mm 35-mm equivalent focal length
Stacking done using DeepSkyStacker software; Post-processing with Photoshop CS5.
Discovered by NASA's Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) mission on March 27th 2020, this long period comet is now on its way out of the Solar System having passed just inside the orbit of Mercury at perihelion.
Exposure: 52 x 8s exposures @ ISO1000 equiv. (Total integration time: 6 min 56 s)
Camera: Canon EOS 7D MKII
Lens: EF 70-200mm 1:4 L USM @ f/3.5. 200mm (x1.6).
Mount: Piggy-backed on 8" Meade LX10.
Guiding: None
Alignment & stacking in DeepSkyStacker
Post-processing and image crop in PSP2019
C9.25 with 3.3 focal reducer and QHY5L-II. Captured 20 subs at 20secs each,no guiding. Stacked in Deepskystacker and processed in Photoshop.
Image taken 12/04/16
Canon EOS 550D, Prime Focus, Skywatcher Explorer 200p, Astronomik CLS CCD Filter, 84 lights (30s ISO1600), 11 darks, DeepSkyStacker > Lightroom
100 minutes of integration on M1.
The asteroid left of center is 1997 WN35:
Object (33078) 1997 WN35 RA 05 34 23.2 DEC +22 20 36 Magnitude 19.9 Motion in Arcsecs/Hr: RA 76+ DEC 0-
I've recalibrated and stacked and worked this image a few times since I first attempted it. Each time I come back with one more bit of knowledge.
This time, I'm still calibrating with Maxim. What's new is that I'm calibrating with 2C increments. Thus, for the 10 lights, there's two sections for calibration. This significantly reduces the over and undercorrection that I was seeing before. Also, it makes the post process a lot easier to manage.
Same details as before:
10 lights total, each at 600 seconds and 400 ISO.
Scope was the Orion 127mm Maksutov Cassegrain guided by a ST80 with SSAG.
64 darks for 14-15C
32 darks for 16C
256 bias
15 flat
Calibrated to make FITs in Maxim. Then debayered and stacked in DSS 3.3.3 beta 47 with kappa 2 5 iterations.
Processed in PI: dynamic crop, dbe, masked stretch, masks made from extrated lightness, these maskes used on atrous and deconvolution, multiscale media transform used on the remaining layers to boost the brightness of the nebulosity, unsharp mask, new mask from lightness, curves used on positive and inverse of this mask to bring up saturation and rgb as well as drive the background lower.
Exported to LR3 for upload.
Here's the platesolve:
Referentiation Matrix (Gnomonic projection = Matrix * Coords[x,y]):
+0.000009018848 +0.000208680214 -0.282411212779
-0.000208635884 +0.000008952885 +0.388572952899
+0.000000000000 +0.000000000000 +1.000000000000
Resolution ........ 0.752 arcsec/pix
Rotation .......... -92.472 deg
Focal ............. 1665.23 mm
Pixel size ........ 6.07 um
Field of view ..... 48' 2.7" x 31' 50.5"
Image center ...... RA: 05 34 32.008 Dec: +21 59 10.65
Image bounds:
top-left ....... RA: 05 33 18.711 Dec: +22 22 28.49
top-right ...... RA: 05 33 28.047 Dec: +21 34 29.13
bottom-left .... RA: 05 35 36.340 Dec: +22 23 50.62
bottom-right ... RA: 05 35 44.903 Dec: +21 35 50.79
Sky-Watcher 80ED APO, AZ-EQ5 GT, Altair Lightwave Flattener/Reducer 0.8x, Nikon D7000, ZWO ASI120MC + Altair 60mm f/3.75 guidescope. Only two frames 180 sec. each due to some technical problems, stacked with DSS. Approx. 25 x dark and bias.
Comet 46P/Wirtanen
Optics: Takahashi FS60CB with 0.72x Reducer (255 mm F4.2)
Exposure: Fujifilm X-E1 (Unmodded) iso6400 x 1 min x 60 subs (with Dark, Flat, Flat Dark, Bias)
Mount: Toast Pro (TP2)
Software: DeepSkyStacker, Astronomy Tools, GradientXTerminator, Adobe Photoshop
A planetary nebula in Constellation Vulpecula....1360 l.y. away
Taken from my suburban Sydney backyard on 15/08/2009
Modified Canon EOS 400D, Orion ED80 (FL600mm) at prime focus. IDAS LPS filter
EQ5 mount autoguided by 3"WO refractor;Philips webcam & PhD
ISO800 6 X 5min subs stacked in DeepSkyStacker with darks.
Heavily cropped
Rework of previous data from Jan 2021. Less 'over-processed' as some would say.
Comments welcomed, Ed.
Acquisition Equipment
Camera - CANON EOS 60D (Modified)
Filter - Astronomik CLS-CCD EOS Clip
Telescope - SkyWatcher Evostar 80ED
Reducer/Flattener - 0.85x
Focal Length - 510mm
F Ratio - F6.3
Mount - Celestron CG-5 Adv GT GEM
Guide Scope - Celestron 9x50
Guide Camera - QHY 5 Mono
Image Capture
136 x 10 secs = 22 mins
28 x 60 secs = 38 mins
80 x 180 sec = 4 hours
Total = 5 hours
350 x Dark frames
250 x Bias frames
230 x Flat frames
230 x Dark flat frames
Acquisition Software
Capture/Sequence - N.I.N.A.
Plate Solving - ASTAP
Guiding - PHD2
Planetarium – Stellarium
Processing Software
Stacking - DeepSkyStacker
Post - Adobe Photoshop / Bridge / Camera Raw
taken at McDermott Court at MIT.
Camera settings: 70-300mm lens @ 300mm, F/5.6, 2 sec. per frame, 144 frames, ISO 1250. Stacked with dark, flat, and offset frames subtracted.
Total exposure time 56 min.
I used iso 800 and iso 400
Few darks
Celestron Nexstar 130Slt
Canon Eos 10D
DeepSkyStacker
Photoshop
I took more pictures of this object and added them to my previous session.
I think this is a little green, but I got backround quite dark..
I am still working to get flats right, but after testing I noticed that 50 frames without any calibrate frames gives me less noise.. And noise is the hardest to edit. Vigneting is easier..
I am going to make lightbox and I´m hoping to get opportunity to test it in this season, while nights are still dark.
Localisation : CastresmallObservatory (Castres, Tarn - France)
Acquisition Date : 2017-01-07
Auteur/Author : ROUGÉ Pierre
Mouture/mount : Orion Atlas EQ-G
Tube/Scope : Newton Orion 200/1000 (f/5) + MPCC Baader
Autoguiding : Skywatcher Synguider (v1.1) & Meade ETX 70/350 mm
Camera : Canon EOS 400D (Digital Rebel Xti) refiltré Astrodon in Side (modded Astrodon in Side)
+ EOS CLIP CLS Astronomik
Exposure : 37 minutes [37 subexposures of 60 sec each (selected from 40)] @ ISO 1600
Calibration : Dark & Bias : 20/11 @ ISO 1600 - Flat & Dark-Flat : 9 @ ISO 400
Temps/Weather : Bonne transparence. Faible vent nul. T= -2°C. Humidité faible.Lune/moon 62 %.
Constellation : Gemeaux
Software Used : Astro Photograph Tool (v3.13), DeepSkyStacker 3.3.6, Pixinsight LE, PhotoShop 7, xnview, Noiseware Community Edition
Got a new scope :) A skywatcher 200mm f5 Newtonion. Spent the last couple of nights collimating - not perfect yet but getting there......
Date:11/10/2009
Location:Brisbane Australia
Imaging Camera: Canon 1000D prime focus
Imaging Scope: 200mm Newtonian
Focal Length: 1000mm F5
Guide Camera: SSAG
Guide Scope: Orion 80mm F5 Refractor
Guided with PHD Guiding
Mount: Celestron EQ5 GT
Exposure: 20 min (10x2min) full colour
Darks: 4x2min
ISO: 800
Processing: DeepSkyStacker, CS3, Noel Carboni's Astronomy Tools
Equipment:
Telescope: Orion XT10i on Skywatcher EQ6 Pro
Camera: Canon 550D unmodified + Baader MPCC
Guiding: None
Software: DeepSkyStacker, PixInsight
Images: 65x60sec ISO1600 Lights; 22x Darks; 8x Flats
Messier 20, The Trifid Nebula
OTA: Celestron C8N 8" f/5 newtonian reflector
Mount: CGEM DX
Camera: Canon 350d modified 54F
Exposure: 15x4min ISO 200
Skyglow imaging filter
MPCC coma corrector
Guided with PHD, SSAG, ST80
Captured with BackyardEOS
Registered and stacked with DeepSkyStacker
Photographed from Round Rock TX (Orange zone)
La luna estaba casi llena, al 96%
Las estrellas rotan alrededor del Polo Norte, ubicado detrás de las nubes de tormenta
Camera: Canon T1i unmodified
Exposure: 25 min (50x30 seg) at ISO 400 @ 18 mm
White balance: Daylight
Mode: RAW
Focal ratio: f4.5
Lens: Canon EF-S 18-55 mm f/4-5.6 IS
Date: 01-Oct-2012
Processing: Combining in DeepSkyStacker (no alignment), 30 darks, no flats
Location: Bogotá, Colombia
Camera: Nikon D50
Exposure: 104m (25 frames) ISO 800 RGB
Filter: Orion Skyglow Imaging Filter
Focus Method: Prime focus
Telescope Aperature/Focal Length: 203×812mm
Mount: LXD75
Telescope: Meade 8" Schmidt-Newtonian
Guided: Yes - PHD Guiding
Stacked: DeepSkyStacker
Adjustments: cropped/leveled in Photoshop
Location: Flintstone, GA
鏡筒: 8cm F6 (笠井 BLANCA-80EDT) + 0.6x レデューサー
カメラ: OM-D E-M5
赤道儀: スカイメモS
288mm, F3.6, 20s, ISO1000 を DeepSkyStacker で8枚コンポジット。LightRoom CC でトリミング、トーンカーブ調整等。
Skywatcher 150PDS
Celestron CG5
Nikon D90
ISO: 3200
Exposure: 1 s
20 frames
DeepSkyStacker 20 frames stacked
GIMP 2.10
This was my major target and effort for Calstar 2012. Taken over a series of 3 nights from September 13-16. My first evening under the stars had the camera rotated in the wrong position, so I couldn't use the subs very well. Because the camera position varied from evening to evening, this became an exercise in making a mosaic as well.
Because of the mosaic layout, amp glow from the camera was a big problem. My previous efforts to use DSS and PI to calibrate and stack were not able to sufficiently remove the glow. In the end, I loaded up Maxim, pointed it at darks that were in the temperature range of the lights and let it do a full calibration. The stacking of the resulting 59 fit files were done in DSS 3.3.3 beta 47 as a Sigma Clip. Processing was done in PI where I cropped, DBE, masked stretch, NR, and then a small MT to tighten up the stars. Brought the images into LR3 for touches to fix the blue halos in the bright stars (artifacts from calibration) and some final lines from the mosaic.
Final stack of 59 lights of 10 minutes at 400 ISO. Calibrated in Maxim with 63 darks, 27 flats, and 55 bias. Shot with the full-spectrum Pentax K10D camera with the cooler attached giving temps ranging from 19-21C. Telescope was a Stellarvue SV4 guided with Maxim using Orion SSAG on SV70ED. All used on a Losmandy G-11.
Here is the resolve data from PI:
Resolution ........ 1.912 arcsec/pix
Rotation .......... -168.166 deg
Focal ............. 582.47 mm
Pixel size ........ 5.40 um
Field of view ..... 2d 30' 8.6" x 1d 22' 2.1"
Image center ...... RA: 04 02 03.917 Dec: +36 19 53.55
Image bounds:
top-left ....... RA: 03 55 19.664 Dec: +35 54 27.14
top-right ...... RA: 04 07 22.991 Dec: +35 23 53.25
bottom-left .... RA: 03 56 37.168 Dec: +37 14 59.58
bottom-right ... RA: 04 08 52.468 Dec: +36 43 53.97
Lessons learned: Maxim does a good job with non-linear amp glow areas. I'll be going back to some of my problematic subs to recalibrate. I'll have to see what I can do to fix the blue rings in the bright stars as calibration doesn't seem to control these well.
40min total (4x600s@800iso)
UK 30/12/13
Takahashi FSQ106ED f/5
Celestron Advanced Vx Mount Guided
Canon 1100d (modified) CLS filter
BackyardEOS, PHD
Deepskystacker, Photoshop CS6