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M1 from 2MASS data - Graham Relf

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Graham Relf
Time of observation
17/05/2011 - 12:00
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Graham writes: I have been pursuing David Boyd's point in his 2010 Presidential Address (in the current Journal) that we amateurs could usefully work on the huge amount of data that is available on the Internet which the professionals do not have time to analyse. The 2-micron all-sky survey (2MASS) was a professional project that ran from 1997 to 2001. Its images are available as FITS files on the Internet for anyone to download and process (go to http://irsa.ipac.caltech.edu/applications/Gator/). 2MASS imaged in 3 wavebands: Johnson H, J and K (respectively centred on 1.25, 1.65 and 2.17 microns) using two 1.3 metre telescopes in USA and Chile. I have used 3 such images of M1, the Crab Nebula, to make a false colour image, treating the H band as red, J as green and K as blue. That is what you see in the left half of this image. (Original files aH_asky_971018n0810185.fits, etc, created on 1997 Oct 18 at 9:14 UT). Compare this with optical photos and you will see that the shape of the nebula is rather different at these infra-red wavelengths. As created, my RGB image had 64 bits per colour channel and I processed it as such to make the version on the right. I did a wide radius unsharp mask by blurring the image and then subtracting a proportion of that blurred version from the original. That had the effect of exaggerating subtle details. It is known that M1 has strong magnetic fields (partly from photography through polarising filters at optical wavelengths) and so I suppose my result probably shows gas looping around the field lines. Maybe no-one has seen this particular view before. M1 has been in the news recently because the Fermi Gamma-ray Space Telescope has detected gamma ray flares from it, which no-one can explain. Who knows what awaits discovery in the vast online repository of unanalysed images? Graham Relf www.grelf.net

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Jupiter - Khaled Al-jamaan

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Khaled Al-Jamaan
Time of observation
09/05/2011 - 15:15
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Two images of Jupiter taken on consecutive nights by Khaled Al-jamaan, using a Celestron 11" telescope and a NexImage camera. Images taken in Kuwait - Salmidesert (150 kilometers from Kuwait City ).

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Saturn on April 29 - Gordon MacLeod

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Gordon MacLeod
Time of observation
03/05/2011 - 14:00
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Saturn on April 29th, taken with a 6 inch refractor, f/9, with a Celestron Neximager at approximately x480 magnification, from Hastigrow, Bower, By Wick

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C/2010X1 Elenin

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Martin Mobberley
Time of observation
02/05/2011 - 12:42
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Martin Mobberley images
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C/2010X1 Elenin

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Martin Mobberley
Time of observation
02/05/2011 - 12:42
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Martin Mobberley images
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C/2010X1 Elenin

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Martin Mobberley
Time of observation
02/05/2011 - 12:42
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Martin Mobberley images
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Solar Active Region 1195 - Dennis Boon

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Dennis Boon
Time of observation
26/04/2011 - 15:26
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Here's a white light image of AR 1195. Details:- Date: 23rd April 2011 Equipment: Orion Optics OMC200, Lumenera CCD, Televue 2X powermate and Baader AstroSolar Film.
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Copernicus - Paul Brierley

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Paul Brierley
Time of observation
18/04/2011 - 12:56
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Copernicus and Eratosthenes, and Carpathian mountains. Also visible in this picture are the craters Reinhold and Fauth. These are visible above and to the left of Copernicus. Reinhold is the upper crater. The image was captured on 2011-04-12 during early evening (19:30), whilst the Moon was between Leo and Gemini. Equipment:SPX 250, 10" F4.8 Orion Optics Newtonian, with a X2 barlow and a QHY5 camera, with a deep red W25 filter. I have noticed how the seeing appears to be more stable, during the last hour before Sunset.
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Saturn - March 28 - Damian Peach

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Damian Peach
Time of observation
11/04/2011 - 12:30
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Saturn imaged by Damian Peach on March 28th, with the planet at only 34 degrees altitude.

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NGC 2903 - Bob Winter

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Bob Winter
Time of observation
04/04/2011 - 16:00
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NGC 2903 Galaxy in Leo TSA 120 Refractor QSI 583 Camera, LRBG using L,Red,Green,Blue Astrodon filters.Total 90 min. Wales 27.3.11

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