Anisha:

• Central Coords determined from uploading images to astrometry.net
• Simbad database used
• 14' radius as images at 10' x 14'
• Number of stars with V mag, B mag, R mag data shown in table.
• Table of cluster data:

• Double cluster on Aladin with 14' radius using SIMBAD:
  

• HR of Double Cluster with 1130 stars:
  

• Improved code: Simulation_test8.py.txt
• Uploaded some star cluster images (from observation 1) to Astrometry.net, returned image center coordinates(RA/DEC):
  • Double Cluster: http://nova.astrometry.net/user_images/1359062#annotated -> (02h 22m 32.383s/+57° 07' 57.816'')
  • M103: http://nova.astrometry.net/user_images/1360447#annotated -> (01h 33m 34.540s/+60° 38' 13.177'')
  • Dragonfly Cluster: http://nova.astrometry.net/user_images/1360446#annotated -> (01h 19m 59.472s/+58° 15' 57.858'')
• Simulated star fields centered on each set of coordinates (with rho=0, sigma_x/y=2)
• (LEFT: Simulated star field; RIGHT: Original image)
• Double CLuster (418 stars):
• 
• M103 (92 stars):
• 
• Dragonfly Cluster (108 stars):
• 
• Notes on simulations:
  • When opened in ImageJ, had to rotate 90deg right and flip horizontally to 'match' real image.
  • Simulation images appear stretched in x axis compared to real image.
  • Attempted to upload to Astrometry.net - all failed to match stars.

• For Aaron's Double Cluster simulation:
  • median background is 917.0
  • sigma is 410.9
  • starfinder counts 445 stars out of 418
• For the Dragonfly simulation:
  • mean background is 917.0
  • sigma is 635.6
  • starfinder counts 112 stars out of 108
• For M103 simulation:
  • mean background is 917.0
  • sigma is 152.5
  • starfinder counts 79601 stars out of 92
• For a visible frame of the Double Cluster, at 30 s exposure, with median pixel value of 1040:
  • Threshold initially set at 1090, then increased by 50
•