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M1 - Crab Nebula H alfa (up) and Visual (middle)
H alfa and visual images combinated: H alfa = red, green = visual (down) Filaments of the Crab Nebula M1 are bright in H alpha light (656.28nm). Stars in the lowest photo are green because H alpha filter is very narrow. |
M1 - Crab Nebula infrared (up) and ultraviolet (middle) Infrared and ultraviolet images combinated: infrared = red, ultraviolet = blue (down) |
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Telescope: ITelescopes Telescope-21 0,43m (17inch), f/6.8 with focal reducer f/4,5 (Located to USA) Camera: FLI PL6303E - Non Anti Blooming Gate 0.96 Arc secs/pixels Filter: Ha V (photometry visual) Exposure: 3 * 180s Ha 3 * 180s V Date: Ha 29 Oct. 2012 Date: V 31 Oct. 2012 |
Telescope: ITelescopes Telescope-17 0,43m (17inch), f/6.8 (Located to Australia) Camera: FLI PL4710 - Non Anti Blooming Gate 0.92 Arc secs/pixels Filter: I (photometry infrared) U (photometry ultraviolet) Exposure: 3 * 300s I 3 * 600s U Date: I 21 Aug. 2013 Date: U 20 Aug. 2013 |