To do list:

• Anisha:
• Aaron:
  • Simulate a star field using known star parameters.
• Laura:
  • Check star finder finds all stars in images from observation.

Observation 1: Looked at M103, Dragonfly Cluster and Double Cluster with luminescence, red, green (visual) and blue filters all at -15 degrees.

Anisha:

• Used Simbad catalog in Aladin to get RA/DEC and B, V and R magnitudes to give to Aaron to a real simulate starfield
• Used data to plot B-V HR diagram for observed clusters
• Hertzsprung Russell diagram for double cluster using data from Simbad:
  
• Hertzsprung Russell diagram for M103 using data from Simbad:
  

Simulation program: Simulation_test7.py.txt

• Given list of star parameters fom Anisha - includes positions (RA, DEC) and magnitudes (for B, V, R filters).
• Method for converting angular coordinates to pixel coordinates:
  • Take camera/telescope alignment as coordinates for image center, or origin.
  • Take difference in star coordinates and origin coordinates (e.g. RA_star-RA_o) to gain angular positions in relation to origin.
  • Use plate scale (e.g 0.61 arcsec/pixel) to convert angular position to pixel scale position. (Not entirely accurate - isn't linear near image edges)
  • Linear transformation of positions so origin is in bottom-left corner of image.
• Tested generation for recorded stars in Double Cluster and M103. For both: 1530x1020 pixels, Sigma_x=Sigma_y=3, rho=0, includes background+saturation
• M103 (center RA/DEC (J2000): 1h33m12.01s/+60deg42'00.0"):
• 
• Double Cluster (center RA/DEC (J2000): 2h19m0.00s/+57deg09'00.0") - generated with switched axes due to programming error:
• 

• Algorithm can return:
  • The number of stars in the image
  • The number of pixels in each star
  • The coordinates of the pixels in the stars
  • The pixel values at each coordinate
  • The weighted average of x and y positions
• Next step is to convert coordinates to RA and Dec and compare to actual values
• Luminescence image of Double Cluster at 15s exposure:

• Stars located using algorithm, counted 279 stars: