Observation Log - July 14, 2001 - Tinton Falls, NJ

Links to the Image Index or Home Page.

[Left the telescope configured the same as the 07/12/01 run, that is, the MX516 was left on the telescope, so I can possibly reuse the flats. Configuration was Crayford/f3.3 reducer/1.25" visual back/MX516 camera, with no filters. Very nice night with lows around 50F. Had problems with clouds after midnight, and had to cut the session short. Saw minor dew on corrector at end of last image, as I hadn't run the dew heater. Took some flats during evening twilight, and darks at the end of the session. -GW]

This is NGC6482 , a galaxy in Hercules, magnitude 11.4, dimensions 2'.1 x 1'.8, surface brightness 10.6 mags/sq arcmin. Distance is given as 180 million light years. This image was made from 27 1-minute exposures for a 27-minute total integration time, taken between 10:37 and 11:11 p.m. the evening of July 13, 2001. The images were calibrated using MaxIm, aligned and composited, and flattened. (Note that the composite was made using a median algorithm rather than the normal summing.) A Digital Development filter (Kernel, low-pass, more) was applied. The resulting image was finished with a contrast enhancement. Note the superimposed star to the right of the galaxy core. Here is another version resampled to have double the image scale.

This is NGC6574 , a galaxy in Hercules, magnitude 12.0, dimensions 1'.5 x 1'.1, surface brightness 11.7 mags/sq arcmin. Distance is given as 110 million light years. This image was made from 31 1-minute exposures for a 31-minute total integration time, taken between 11:16 and 11:57 p.m. the evening of July 13, 2001. The images were calibrated using MaxIm, aligned and composited, and flattened. A Digital Development filter (Kernel, low-pass, more) was applied. The resulting image was finished with a contrast enhancement. Here is another version resampled to have double the image scale.

This is NGC6802 , an open cluster in Vulpecula, magnitude 8.8, diameter 3'.2. This image was made from 15 1-minute exposures for a 15-minute total integration time, taken between 12:00 and 12:28 a.m. the morning of July 14, 2001. The images were calibrated using MaxIm, aligned and composited, and flattened. The image was finished with a contrast enhancement. Here is another version resampled to have double the image scale.