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Comparing Swope and Foundation Data
Comparing Swope and Foundation Data
Given a list of Swope data and Foundation data, I found the objects that were observed by both surveys, in the same filter, and within a day of each other. This means the difference in brightness between the two surveys should be very small if Swope data is calibrated correctly.
Magnitude Differences
Magnitude Differences
This plot is intended to look for problems in calibration. As the magnitude gets dimmer (larger numbers) in the x-axis, the difference increases. Larger errors in this region are expected since the signal to noise ratio decreases.
Magnitude and Phase
Magnitude and Phase
The x-axis in this plot is days from the peak brightness. Supernovae increase in brightness and then decrease over time. It is expected that there is more error further away from the peak brightness because of a low signal to noise ratio.
Signal to Noise
Signal to Noise
Filter Comparisons
Filter Comparisons
These three graphs are magnitude differences for each filter. This was done to look for variations in brightness between filters.
Image Quality Checks
Image Quality Checks
I looked at over 800 images from the Swope telescope to look for abnormalities.
LDS 749b before
LDS 749b before, with scale shifted.
LDS 749b after correction
LDS 749b after correction, with scale shifted.
LDS 749b
LDS 749b
This image needed further processing to get rid of the "shutter" effect.
2018bie image in the r-filter
2018bie image in r-filter with scale shifted. Vertical line visible.
2018bie in g-filter
2018bie in g-filter with scale shifted.
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