On the Mark IV CD-Rom number 3 are a set of images taken by Tom Droege with the Mark IV prototype camera. Glenn Gombert used the "SExtractor" program to find about 3000 stars in the image H4R1260.944.
From a message sent by Glenn on Sept 11, 1999
I have just finished the basic conversion necessary for the Linux version of the "Star" program to process Tom's Mark III images. I have uploaded to Michael's ftp site two star-lists for the images:
H3R1399.725 H4R1399.725These two images were flat-fielded and dark-frame subtracted using the dark & flat frames that Tom sent out on his last CD-ROM's. The two images were processed into star -lists:
BH3R1399.725 - 18,000 stars BH4R1399.725 - 21,600 stars!!These images take about 4-5 minutes each to process on a PII-450 Mhz machine at work with 256 meg of ram. These start-lists themselves are about 3 megabytes each in size!! I think that once the Mark IV cameras start producing data that we are going to find ourselves looking down a "Niagara Falls if data!
Also it is going to take a _long_ time on a "slow" computer (or a very fast machine) to keep up with the night-to-night accumulation and processing of all the data that is going to be generated from just one Mark IV site. With the volume of data that is going to be generated I doubt that the current database architecture is going to be up to the task. (Something for Chris and Michael to start worrying about)....
I have had several requests from Chris and Herb for the code and make file for the Mark III processing program, I will post this in the next week or two when I have had a chance to clean several programs up a little....
Ed note: the RA and Dec values in these files must be incorrect: each frame covers only 4 degrees. MWR 9/12/1999