Observation Log - October 16, 2001

Observation Log - October 16, 2001 - Tinton Falls, NJ

Quite a nice night tonight, with no moon to interfere. Temperature at dawn was 46F. Had some dew during the night, but the dew shield plus the Kendrick heater kept it at bay. Configuration was Crayford/f3.3 reducer/T- adapter/MX516 camera with no filters. The camera was mounted upside-down. I took darks and flats at dawn.

This is NGC6749, a globular cluster in Aquila, magnitude 11.1, diameter is 6'.3. This image was composited from 31 one-minute exposures for a total integration time of 31 minutes. The images were taken between 7:52 and 8:35 p.m. the evening of October 15, 2001. The image was calibrated and aligned in MaxIm, using a sum composite. The resulting composite image was rotated 180 degrees, flattened, and then processed with a Development filter (Kernel, low-pass) and finished with a contrast stretch. Here is another version of this same image, resampled to twice the image scale to show a little more detail.

Next up is NGC7001, a galaxy in Aquarius, magnitude 12.9, dimensions are 1'.4 x 1'.1, and the surface brightness is 13.9 mags/sq arcmin. This image was composited from 85 one-minute exposures for a total integration time of 85 minutes. The images were taken between 8:46 and 10:38 p.m. the evening of October 15, 2001. The image was calibrated and aligned in MaxIm, using a sum composite. The resulting composite image was rotated 180 degrees, flattened, and then processed with a Development filter (FFT, low-pass, hard) and finished with a contrast stretch. Here is another version of this same image, resampled to twice the image scale.

This is NGC7081, a galaxy in Aquarius, magnitude 12.7, dimensions are 1'.3 x 1'.3, and the surface brightness is 14.1 mags/sq arcmin. This image was composited from 21 one- minute exposures for a total integration time of 21 minutes. The images were taken between 10:41 and 11:05 p.m. the evening of October 15, 2001. The image was calibrated and aligned in MaxIm, using a sum composite. The resulting composite image was rotated 180 degrees, flattened, and then processed with a Development filter (FFT, low-pass, mild) and finished with a contrast stretch. Here is another version of this same image, resampled to twice the image scale.

This is NGC7782, a galaxy in Pisces, magnitude 12.2, dimensions are 2'.2 x 1'.3, and the surface brightness is 13.1 mags/sq arcmin. This image was composited from 60 one- minute exposures for a total integration time of 60 minutes. The images were taken between 11:18 and 12:32 a.m. the morning of October 16, 2001. The image was calibrated and aligned in MaxIm, using a sum composite. The resulting composite image was rotated 180 degrees, flattened, and then processed with a Development filter (FFT, low-pass, hard). The image was given an FFT filter (low-pass, mild) and finished with a contrast stretch. Here is another version of the image, resampled to twice the image scale.

This is NGC575, a galaxy in Pisces, magnitude 12.8, dimensions are 1'.7 x 1'.6, and the surface brightness is 14.6 mags/sq arcmin. This image was composited from 53 one- minute exposures for a total integration time of 53 minutes. The images were taken between 12:43 and 1:56 a.m. the morning of October 16, 2001. The image was calibrated and aligned in MaxIm, using a sum composite. The resulting composite image was rotated 180 degrees, flattened, and then processed with a Development filter (Kernel, low-pass). The image was given an FFT filter (low- pass, mild) and finished with a contrast stretch. Here is another version of the image, resampled to twice the image scale.

This is NGC973, a galaxy in Triangulum, magnitude 12.8, dimensions are 3'.7 x 0'.5, and the surface brightness is 15.0 mags/sq arcmin. This image was composited from 69 one- minute exposures for a total integration time of 69 minutes. The images were taken between 2:01 and 3:26 a.m. the morning of October 16, 2001. The image was calibrated and aligned in MaxIm, using a sum composite. The resulting composite image was rotated 180 degrees, flattened, and then processed with a Development filter (Kernel, low-pass, more) and finished with a contrast stretch. Here is another version of the image, resampled to twice the image scale.

This is NGC1635, a galaxy in Eridanus, magnitude 12.4, dimensions are 1'.4 x 1'.3, and the surface brightness is 14.0 mags/sq arcmin. This image was composited from 93 one- minute exposures for a total integration time of 93 minutes. The images were taken between 3:33 and 5:31 a.m. the morning of October 16, 2001. The image was calibrated and aligned in MaxIm, using a sum composite. The resulting composite image was rotated 180 degrees, flattened, and then processed with a Development filter (FFT, low-pass, hard) and finished with a contrast stretch. Here is another version of the image, resampled to twice the image scale.