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Hi guys!I finally managed to decide I'm done processing my insane photoproject of digging deep inside M31.Long story short: One picture of M31, 27megapixel 2x2 mosaic, +3 months of imaging in crappy weather, 18 separate nights, 534 separate exposures, +150 hours of processing, 1233 manually annotated objects inside M31.(images in the end of this post, lots of "bla bla" first)I had a great start last autumn with loads of clear nights, which made me think it be a quick stab to make a 2x2 mosaic (my first mosaic btw) of M 31 since my f.o.v is to narrow to capture M31 in one frame...But pretty much as soon as I started, the swedish weather turned into a mess which made me shoot M31 during 18(!) separate nights, during more than 3 months(!).I also spent countless of hours studying the M31 Atlas available online at: http://ned.ipac.caltech.edu/level5/ANDROMEDA_Atlas/frames.htmlIt contains +40 annotated plates of M31 captured with Kitts Peak 4m telescope and contains +1000 globular clusters, open clusters, stellar ascossiations and dust-clouds inside M31.By looking at those charts, I manually annotated 1233 objects in my image, along with names & outlines (except for dustcloud-names, since it cluttered the image too much)Here's what I found within my image:232 Globular Clusters235 Open Clusters140 Stellar Assosciations626 Dust CloudsData captured using ACP + SchedulerCalibration was done in Maxim, registration & stacking + mosaic-merging done in PI, the rest in photoshop.Gear:Telescope: Orion Optics AG12Camera: QSI 583 wsg-8Mount: 10Micron GM 2000 HPSGuiding: UnguidedSummary of exposures:Lum: 364 x 180s / 1092 minutesRed: 39 x 300s / 195 minutesGreen : 36 x 300s / 180 minutesBlue : 43 x 300s / 215 minutesHa : 52 x 900s / 780 minutesTotal time: 2462 minutes / 41 hoursHere are a few 100% crops so you can appreciate the level of resolution and the hard work behind it.(note Hubbles famous Cepheid, marked as "Var 1")Also, here's one of the charts used for annotation along with a matching crop from my image:If you're not using a mobile device, I highly recommend following the links to my homepage where the image is presented in full resolution along with selectable annotation-layers containing the following:Globular ClustersOpen ClustersDark NebulaeStellar AssociationsGrid + DSO'sIt was really mind-boggling processing a image of this scale, realizing that all those fuzzy spots visible inside the galaxy are actually open clusters and globular clusters, along with Ha-regions and much more!Unfortunately mobile devices usually downscale the huge 27MP resolution images and have trouble with the annotation-layers, so if you're using a computer(highly recommended), click the following images to be taken to my homepage where you can select which layers of annotation to be displayed, as well as the choice of 3 different resolutions. Otherwise there are direct-links to all versions below the images in this thread.Direct-links to images, No annotation:http://www.grinderphoto.se/pics/Med_102.jpg - (1024px width)http://www.grinderphoto.se/pics/Large_102.jpg - (3500px width)http://www.grinderphoto.se/pics/Full_102.jpg - (+6000px width)Direct-links to images, Annotated:http://www.grinderphoto.se/pics/Med_102_Annotated.jpg - (1024px width)http://www.grinderphoto.se/pics/Large_102_Annotated.jpg - (3500px width)http://www.grinderphoto.se/pics/Full_102_Annotated.jpg - (+6000px width)Thanks for watching, I hope you enjoy exploring all the details in this fantastic galaxy!Best RegardsJonas Grindehttp://www.grinderphoto.se
Hi guys! I've finally decided it's time to stop playing with the data from my AG12 first light and come up with a final result from the processing. The AG12 from Orion Optics UK is a carbon fibre newtonian astrograph. With 300mm aperture, and a blazing fast focal ratio of f/3.8, it really gives an interesting match to my QSI 583, landing at an image-scale of 0.98 arcsec/pixel, and still superfast so no need to bin(yuck) the camera to achieve the desired pixelscale and speed. This gives me really high resolution and still a relatively wide field of view compared to other rigs sporting this resolution. Unfortunately I wasn't able to drive out to the obsy & give the scope the collimation and ccd/corrector-distance tuning needed due to a knee-injury, but it performed quite fine even though the ccd/corrector spacing was off with 4-5mm (!) One of my main goals with this image was to try to lure out the überfaint IFN (Integrated Flux Nebulae) lurking in the background between these two famous galaxies (sidenote: the IFN is in our galaxy). I found it very difficult to reach a natural balance between mega-stretched background IFN and more realistic stretch of the galaxies, so I ended up with two versions, one where I held back on the background to give the whole image the kind of look I prefer in images, and one version where I stretched away, the disney-version. And of course, annotated versions of 'em both. The Scope: Orion Optics AG12 Aperture: 12" Focal lenght: 1140mm Focal ratio: f/3.8 Imaging scale: 0.98" / pixel together with my QSI 583 The Mount: 10 Micron GM 2000 HPS All subs unguided The Camera: QSI 583 wsg (with 8-position filterwheel upgrade) Filters: Astrodon The Subs (unguided): Lum: 41 * 5 min RGB: 11 * 5 min each channel Ha: 12 * 10 min Click images for full-res version: Click images for full-res version: And the annotated ones: Hope you enjoyed the first look, I can't wait to try the scope out with the correct tuning! Best Regards Jonas Grinde
Ahoy mateys! I finally had the time to process some of the data I've acquired during this autumn, my current workload have "forced" me keep shooting completely automated data from my roll-off-roof observatory 12km outside my city. This have been by far one of the toughest targets to process, even though I had quite a pile of data to juggle with, there's endless of stuff embedded in the spiral-arms that took great concentration and discipline to bring out without throwing off the rest of the image. Data aquired during 5 different nights, shooting the subs when the target was in the highest position of the sky. I've also included an annotated version where tons of dss2-galaxies are marked and labeled with magnitude. Moonlight during the lum-acquisition limited the background-depth somewhat. Aquisition:ACP + SchedulerMaximDLFocusMaxTelescope: Orion Optics AG12Camera: QSI 583 wsg-8Mount: 10Micron GM 2000 HPSGuiding: UnguidedExposures:Lum : 77 x 180sRed : 20 x 180sGreen : 20 x 180sBlue : 20 x 180sHa : 12 x 600sTotal time: 531 minutes / 8.9 hours Click image for bigger versionClick image for annotated versionI've just implemented a smooth transition "mouse-over" function for annotated images on my homepage, it's very interesting to spot the weak background-galaxies without having to alt-tab between the two versions...Check it out here: http://grinderphoto.se/image.php?id=98&resolution=fullBest RegardsJonas Grindehttp://www.grinderphoto.se
What's up guys, long time since posting due to über-project and horrible weather!Here's a new image I took recently, just to have something to post while I keep collecting more data for a project I'm growing more & more skeptic of being able to bag all the data I need before it's too late for this season.It's the small M 108 in Ursa Majoris, a tiny lil' galaxy measuring around 2x8 arcminutes, so it's a great way to see if it's worth chasing those really small targets, and I'd say it is!But as many of these small galaxies are portrayed with tight & cramped field of views, I think it looks awesome with much space around it, giving all those small background galaxies a change to shine.The annotated version made in PixInsight reported a total of over 2400 galaxies visible in this image (!!!)Some may be really hard to see since I wanted a natural look in the image, but they're all there, I set the magnitude-limit for annotation at the weakest visible galaxies (20.4) with my 3min lum subs & slight lightpolution. Aquisition:ACP + SchedulerMaximDLFocusMaxDate: 2014-01-04Telescope: Orion Optics AG12Camera: QSI 583 wsg-8Mount: 10Micron GM 2000 HPSGuiding: UNGUIDEDLum: 48 x 180s / 144 minutesRed: 12 x 300s / 60 minutesGreen : 12 x 300s / 60 minutesBlue : 12 x 300s / 60 minutesTotal time: 324 minutes / 5.4 hoursClick image for bigger versionClick image for annotated versionI hope you enjoyed both the M 108 and also exploring the area around itBest RegardsJonas Grindehttp://www.grinderphoto.se
How's going people? Long time since last post due to bright Swedish summer nights, gear-tuning and automation fiddling, but now I'm up & running again. I'm starting off the dark season with one of my favorite targets inside the cygnus loop, NGC 6992, east veil nebula. The subs where acquired during three moonlit nights, all subs unguided. (shooting other targets too, so subs are shot when the target is in the highest position in the sky, thanks to ACP automation) I've only used two filters for this image, Ha & O3 (both 5nm). I mixed the color close to Ha/O3/O3 as R/G/B , with slight different weights in G & B, to reach a more blue tone rather than cyan. Both Ha & O3 was used as luminance-data. I also created a "natural" star-color mix of the layers, with Ha / Ha+O3 / O3 as R/G/B and adjusted filterweights until I had a natural mix of yellow & blue (go Sweden!) stars, which was later applied as color-data with a star-mask on top of the image. The Subs (unguided): Ha : 19 x 600s / 190 minutes O3 : 12 x 600s / 120 minutes Total time: 310 minutes / 5.2 hours The Scope: Orion Optics AG12 Aperture: 12" Focal lenght: 1140mm Focal ratio: f/3.8 Imaging scale: 0.98" / pixel together with my QSI 583 The Mount: 10 Micron GM 2000 HPS All subs unguided The Camera: QSI 583 wsg (with 8-position filterwheel upgrade) Filters: Astrodon Click image for full resolution: It's been so much fun to see this object in the high resolution my setup produces, so many faint formations of nebulosity I've never seen before. I also recommend to have a peek at the following link, it's crazy how different the same object can look, imaged through different wavelengths: Click here to see the difference between the Ha & O3 at my homepage, with a "mouse-over" function that switches between the two Thanks a lot for watching Best Regards Jonas Grinde http://www.grinderphoto.se