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Showing results for tags 'h-alpha'.
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From the album: DSO, Nebula, Galaxies, Comets etc
The result of one of my imaging sessions from Kelling Heath Autumn Equinox star party NGC 7635 The Bubble Nebula in Cassiopeia Imaged using Atik 314L monochrome CCD camera and William Optics FLT-110 refractor on NEQ6 Pro SynScan mount 10 x 300 second subs in H-alpha© vicky050373
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From the album: DSO, Nebula, Galaxies, Comets etc
Reprocessed image Atik 314L and Skywatcher Equinox 80 ED H-alpha 10 x 300 seconds and 15 x 600 seconds with some dark and bias frames Stacked in Deep Sky Stacker and processed in PhotoShop CS2© vicky050373
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From the album: DSO, Nebula, Galaxies, Comets etc
The Horsehead Nebula 02.01.2017 Atik 314L and Skywatcher Equinox 80 ED H-alpha 10 x 300 seconds and 15 x 600 seconds with some dark and bias frames Stacked in Deep Sky Stacker and processed in PhotoShop CS2© vicky050373
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From the album: DSO, Nebula, Galaxies, Comets etc
M1 The Crab Nebula 30.12.2016 Taken using Atik 314L monochrome CCD and Celestron 8SE SCT telescope 10 x 300 seconds H-alpha, 10 x 300 seconds OIII and 10 x 300 second darks Narrowband data assigned to colour channels to give a bi-colour image and lightly processed in PS© vicky050373
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From the album: Solar Images
Stacked and processed image of AR12529 taken using William Optics FLT-110 refractor, 1.25" Lunt Herschel Wedge, Baader 7nm H-alpha filter, Celestron X-Cel LX 2 x barlow and QHY5L-II Monochrome planetary camera. 1000 frame AVI processed through PIPP to select the best 50%, then through RegiStax6 to stack and add wavelets.© vicky050373
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From the album: 2015 Various
recently found a cheap 16ic mono - a little old and kernakkered but does the job :) A stack of 7 or 8 subs of 300s 400s and 500s (kept increasing exposure length once good tracking had been established) -
From the album: Sun
Lots of stuff going on. The white bit under the lower left sunspot appeared as I was imaging over the course of minutes, and disappeared not long after. -
From the album: Sun
Another day, another sun. My 2nd attempt at a mosaic. Overcooked some parts though... -
From the album: Sun
ISS passing across the sun, moving left to right. -
From the album: Sun
Close up of prominence at around 4 o'clock of the disc. -
From the album: Sun
Close up of prominence at around 8 o'clock of the disc. -
From the album: Sun
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From the album: Sun
Sun still quite busy. First try since I shaved the eyepiece holder allowing it to be captured in one go now. -
NGC 7635 The Bubble Nebula in Cassiopeia Imaged using Atik 314L monochrome CCD camera and William Optics FLT-110 refractor on NEQ6 Pro SynScan mount 10 x 300 second subs in H-alpha-
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Dear all, as suggested by Hughsie, here's my pastel sketch my contribution to the solar imaging challenge. Telescope: Lunt LS50THaB600PT Eyepiece: Celestron X-Cel 10mm Date & Time: May 29th, 2019 / 1630-1700 CEST Location: home terrace, Dusseldorf region, Germany Technique: reddish Koh-i-Noor Toison d'Or pastels and pastel pens on greyish Canson Mi-Teintes pastel paper Like all of my astronomical sketches , I did this one directly at the eyepiece. The picture of the sketch is taken with my smartphone and just cropped. Clear (and sunny) skies! Achim Size: 24 x 32 cm -
I finished observations of the Mizar A spectroscopic binary. Calibration for the Hα line made on water lines contained in the Earth's atmosphere. I used LowSpec spectrograph with 1800 grooves/mm reflective holographic grating, APM APO 107/700, QHY163M camera and HEQ5 mount with guiding. It turned out that the Earth's movement practically compensated for the radial velocity of the Mizar A system. Based on the analysis, I received the result: vr = -8.8 km/s in fact the system is approaching at a radial velocity of -6.3 km/s. I also determined the phase plot of radial velocities based on my measurements for the Na (together for both lines) and separately for Hα line: Error is based on half my spectral resolution (0.2 Å/pix corresponds to rv = 10 km/s). Each measurement corresponds to the stack a few images. The most important purpose of observing this binary system was to record the historical Ca II line (often called as CaK, 3933.66 Å). The distances in the violet part of the spectrum are almost 2x smaller than the corresponding shifts for the Hα line. This line initiated the discovery of spectroscopically binary systems, and Mizar A was the first discovered system of this type. These were the spectroscopic observations in the 19th century: Source: https://www.leosondra.cz/en/mizar/#b20 I've made several observations of this line in the last two weeks: Animation showing the changes in the CaK line based on my observations: Not only the Ca II is split, but the surrounding lines also, shown below in a wider environment: Balmer hydrogen lines are becoming more dense as Balmer's gap approaches (3646 Å). Observation result of the Hα line: And animation showing the changes in this line: The Na I doublet was much more difficult to observe, because stars with A spectral type contain very faint lines of this metal: Animation showing the changes in the sodium doublet: We received the sodium quartet- 7 replies
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Hi all. I am looking for a zoom eyepiece to 60mm lunt. My first choices are Lunt zoom and Pantax smc xf zoom. Which will work better? Can you have any other offer? You could say something more about these eyepieces while observing h-alpha?
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Yesterday's transit of Mercury in front of the Sun was almost entirely visible from the Netherlands. The transit started around noon in a perfecly clear blue sky and it stayed that way untill around 6pm, when high clouds slowly came in from the south. Unfortunately I missed the end of the event, but nonetheless I was able to watch everything non stop for hours. And it was absolutely wonderful! It started with one of the greatest views I ever saw through my 60mm h-Alpha telescope: the tiny planet's black disk just grazing the side of a prominence. While the dot was just making a dent in de solar disk, the rest of the planet's dark side was ghostly visible against the background of a very dim "halo" next to the brightest part of the prominence. An incredible sight! When the transit proceeded I started making a pastel sketch of the entire Sun's disk. Some small prominences were visible around the edge, and the northern half of the Sun was decorated whith nice filament and mildly active regions. After one hour I finished the drawing with the tiny and inky black dot of Mercury. I photographed the sketch the same evening, and used Photoshop to give it an orange hue and to correct the mirror reversed image. No further alterations were made. And this is a close-up of the same drawing, to show the tiny planet's dot more clearly:
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1. Alcyone (Eta Tauri, η Tau, 25 Tau) in the Pleiades open cluster, spectral type B7IIIe+A0V+A0V+F2V. This star is a multiple system, but my goal of observation was the H-alpha profile of the main component: Horizontal axis scaled to radial velocity: 2. Pleione (28 Tau, BU Tau) also in M45, spectral type B8Vne, variable star, the brightness changes in range: 4.83 - 5.38 V. This is the faintest star, which I observed with using APO 107/700 & Low Spec spectrograph 1800 l/mm. It was difficult, but obervation was positive (high gain, exposure time 4 min): 3. Tianguan (Zeta Tauri, ζ Tau), spectral type B1IVe+G8III: (mark ":" according to the VSX database means uncertainty). This is an eclipsing binary with variability type E/GS+GCAS, period is 133 d. The brightness changes in range: 2.80 - 3.17 V. 4. Cih, Tsih (γ Cas), spectral type B0.5IVpe, variable star with a magnitude range of 1.6 to 3 V: 5. Alnitak (Zeta Orionis, ζ Ori), spectral type O9.5Ibe+B0III. Variable star with a magnitude range of 1.74 to 1.77 V. Spectral lines have characteristic P Cygni profile, below H-alpha:
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I have a Meade 12 inch LX200 and since I'm getting old (84) missing sleep just ain't fun anymore...Sooo I am switching to solar..I will buy a glass H-Apha same size as aperture but it seems the 12 lets in to much light or something. Am studying like crazy on all things solar but am a bit foggy about the H-Alpha...Any help out there? Thanks Ken
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Hi all, as well today the sun is shining brightly here. I set up the Lunt to have a look at it, at first just for observing. However, somehow I cannot resist and have to do a sketch This time I've chosen reddish pastels on grey paper to better catch the color of the view in the eyepiece. Telescope: Lunt LS50THaB600PT Eyepiece: Celestron X-cel 10mm Date & Time: May 15th, 2020 / 1400-1430 CEST Location: home terrace, Dusseldorf region, Germany Technique: red and orange Koh-i-Noor pastels and pastel pens on grey Canson Mi-Teintes pastel paper Size: 24 x 32 cm Clear (and sunny) skies! Achim
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H-alpha solar sketch! Also put up my 90mm refractor beside my LS50. Date : 3/4/17. Time: 3:45 p.m. IST. Nothing much happening about prominances and filaments. AR 12644 still putting up a nice show. AR12645 is comparatively quiet, but spotted micro flare coming out of it during session. Looks like AR12647 and 12648 are developing! Clear skies!
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Managed to capture some H-alpha shots of the sun just after lunch. Some lovely detail visible in the big ARs which are predominantly in the western hemisphere. Right near the eastern limb, a pair of small, very bright spots were visible. I gather that two X-class flares went off in that area around that time, so I either caught the aftermath, or the start. I stacked the images with AS!2 (using flats created with Registax and ImageJ), did wavelet processing in Registax, made the mosaic in Autostitch64, sharpened the result with Fitswork4 using deconvolution, and used curves for pseudocolour with Gimp. Full resolution here. Without pseudocolour: Full resolution here. Without deconvolution Full resolution here. Pretty chuffed with this result, especially with the 35mm aperture of the LS35. I used the TV PowerMate 2.5x and DMK21 with Firecapture. Deconvolution really adds extra sharpness. -
My first full pano of the sun. Actually, it was a 99% pano as I missed a tiny bit of the edge with all the processed frames, but the content aware fill in Photoshop did a great job. Since it didn't have any real detail in it anyway, I didn't go back to the raw files to expand the processing region right to the edge to recover that. This is also my first time using flats for solar imaging. Why didn't I do this earlier? I only tried it this time as there were rather a lot of dust spots I couldn't clean. In order to make a flat, I did the deep sky trick of putting something over the objective. Unfortunately that killed the sensitivity, so I had to jack up to 2 second exposures and maximum gain to see anything at all. Leaving it running for some minutes I got 200 frames and that stacked into a nice dark frame. Well, almost. I was now getting hot pixels too. My fix for that was using the dust and scratches filter to remove them, tuned so as not to remove the actual dust spots which I wanted to keep! The flats also got rid of the stripe optical interference pattern I got at times. Overall, this does give more detail than a single shot full disc capture. But it's not half a lot more work! I used 11 frames in order to fit it. Kit: PST with Hyperion eyepiece projection into DMK41. No idea what image scale is, but about 3 frames will get me across the sun with overlap.
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There's something you don't see every day. I was collecting Ha with my Zuiko 50mm/Atik460 combo tonight, and this appeared on one of the 600s sub-exposures. I didn't see it, but it must have been bright - and presumably have a bit of ionised hydrogen about it (from the meteor and/or the atmosphere). This is the stacked frame with the meteor frame integrated on the stack.
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