OMI: Image Gallery: University of Iowa Rigel

Image Gallery > University of Iowa - Rigel Telescope images

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		2 quick comparison color images, made with LRGB and LHGB filter sequences, of the spiral galaxy M81 and the crab supernova remnant (M1). In the M81 image comparison, the HII regions are much more apparent in the spiral arms, with the HI filaments extend much farther in the Crab. Since the Halpha filter is narrow (10nm) its necessary to increase the exposure time significantly compared with R filter exposure times (which I did not do with these images).
		Crab supernova remnant Created from LRGB image (10x 90sec in each LRGB filter) and clearly shows both the bluish diffuse synchrotron radiation and the H-alpha filaments. The quality is good in spite of the mediocre seeing conditions during capture (2.2 - 2.5 arcsec).
		Pseudo-color image of Comet Holmes, almost as big as the moon! (the field of view is 27 x 27 arcmin).
				Tri-color image of NGC628 (M74). The seeing was only average (see plot), but the stars are nicely round. The entire frame is 27'x27' with new FLI PL09000 CCD camera. Details: 10 x 2min in each filter: LRGB, combined in Maxim.
		IC410 is quite large (about 1x1 deg) so this is only a 1/4 of the nebula, but it shows that a 27x27 arcmin field of view can be useful. The seeing was 2.0 -2.2 arcsec, so it's a pretty nice image. The faintest stars are about 19th magnitude.
				A few color images from first light tests of the Rigel telescope. There are two galaxies (M33, NGC205) and a HII region/nebula (NGC6888). The system is working quite well, except that the optics still need improved collimation. The pointing and tracking are excellent, with less than 30 arcsec RMS error. The successful installation of the upgraded telescope is due in large measure to the heroic efforts of Kevin Ivarsen (former UI student, now at UNC), who played a vital role in the installation. Thanks also to James, Dave, and Toney at OMI who worked hard get the telescope shipped on time, and to FLI, who provided an outstanding CCD camera and filter set. Technical details: Images were constructed from median-averages of 10 images each using L (30 sec) R(60sec), G (60 sec) , B(60sec) filters, and combined in Maxim using LRGB color-combine.
				M17 and M106
				Planetary Nebula NGC1501 First image: VLA 8 GHz Pseudocolor Second image: Rigel Telescope Tri-Color