Observer: The Isaac Newton Group of Telescopes
Location: Roque de Los Muchachos Observatory, La Palma, Spain
Date: March 20, 1997 05:12-06:32 UT
The Isaac Newton Group of Telescopes has designed and built a wide field CCD imaging facility, called CoCam (Comet Camera), to carry out narrow band photometry of comet Hale-Bopp. CoCam consists of a zoom tele-objetive 80-200 mm plus a CCD 2048*1024.
The first picture is the sum of two 100s, one 50s and two 20s exposures using a narrow band filter centered at 618.5nm. They were taken from 6:15 to 6:22, 6:28 and from 6:29 to 6:32 UT on March 20. The field size is 4.2*5.2 degrees. Some interesting structure is visible in front of the coma.
The second picture is the sum of four 10s, three 20s and five 5s exposures without filters. They were taken from 5:12 to 5:19, from 5:22 to 5:26 and from 5:27 to 5:36 UT on March 19. The field size is 5.2*5.2 degrees. The synchronic bands, first observed by Fukushima and collaborators from the National Astronomical Observatory of Japan, are very visible in the dust tail.
Javier Mendez Alvarez
Comet Hale-Bopp Home Page