Star Field Simulation

Stot distribution changed to a skewed Gaussian so there are more dim stars than bright stars

Accept-reject_monte_carlo_Stot_Skewed_distribution.png

Shape function fixed to be more realistic. Adds the effect of an unfocused image.

Unfocused_Image.png

Also, a globular option was implemented.

Globular_Simulation.png

Tested the ability of the star finding algorithm with dense star fields

Analysis_of_Density_of_Stars.png

Star_Density_Analysis.png

Profiles of Stars

Simulated Data

Profile_of_Multiple_Simulated_Stars.pngZoomedIn.png

The sigma for these two stars when using two separate sigma parameters in fit are 8.987 and 9.072, which corresponds to a size of 5.47'' and 5.52''. In comparison, the FWHM corresponds to 6.51''.

This was repeated for real data

RealDataMultiple_stars.png

The sigma for these stars are 1.8413 and 1.8473 pixels, which correspond to a size of 1.12'' and 1.13''.

Topic attachments
I Attachment Action Size Date Who Comment
PNGpng Accept-reject_monte_carlo_Stot_Skewed_distribution.png manage 82.0 K 30 Nov 2017 - 18:23 BekiChafer Stot Distribution
PNGpng Analysis_of_Density_of_Stars.png manage 63.3 K 30 Nov 2017 - 22:06 BekiChafer Plot of Counted Stars versus true number of stars
PNGpng Globular_Simulation.png manage 4.1 K 30 Nov 2017 - 21:07 BekiChafer  
PNGpng Profile_of_Multiple_Simulated_Stars.png manage 32.4 K 30 Nov 2017 - 22:11 BekiChafer Profile of multiple stars from simulated data
PNGpng RealDataMultiple_stars.png manage 33.1 K 30 Nov 2017 - 22:17 BekiChafer Profile of multiple stars from real data
PNGpng Star_Density_Analysis.png manage 65.2 K 30 Nov 2017 - 22:03 BekiChafer Plot of density of star field versus the difference between counted stars and true value
PNGpng Unfocused_Image.png manage 17.8 K 30 Nov 2017 - 22:00 BekiChafer Simulated unfocused star field
PNGpng ZoomedIn.png manage 29.3 K 30 Nov 2017 - 22:12 BekiChafer Zoomed in image of dimmer star from graph

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Topic revision: r2 - 30 Nov 2017 - BekiChafer

 
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