(Click on image for full size version)
| Description: | The Pelican nebula is a large emission and
reflection nebula about 2° east of Deneb, the brightest star in Cygnus.
By imaging using a Hydrogen alpha filter, the nebulosity, which consists
largely of Hydrogen alpha emission, is emphasized. |
| Exposure Data: | 9/19,20/2002. H alpha: 2 x 6x30m. -5°C, 3.5 arc-sec./pixel. |
| Processing: | Acquired via script with Maxim, reduced and
aligned in Mira, Debloomer and hot/cold pixel removal in Maxim, mosaic assembly, post processing in Photoshop. |
| Optical System: | FSQ-106 @ F/5, ST-8E USB NABG/CFW-8A
CCD camera, eFinder/STV, Paramount ME mount. |
| Comments: | Careful, linear flats required for this image.
Total exposure was 6 hours with 8 hours of darks.
Here is a high resolution image of the
upper central region (the pelican's neck) taken with the same exposure time,
6 x 30m, but with my 10" RC at F/7.2 (autoguided) for an image scale of 1
arc-sec./pixel. The FWHM's are around 2.1 arc-sec. |
