Shack Hartmann imager was installed in nasmyth1 of the AuxTel
Notes:
The camera is very obviously misaligned in this picture. It was fixed when data was actually taken).
The acquisition camera + 92:8 beam splitter ended up being pretty much unnecessary because
Data was taken with three different lenslet arrays from Thorlabs, defined as follows:
- Lenslet 0: MLA1M: pitch of 1 mm on one axis, 1.4 mm on the other axis, focal length = 4.7 mm
- Lenslet 1: MLA300-14AR: 300 um pitch, 14.6 mm focal length
- Lenslet 2: MLA150-5c-m: 150 um pitch, f = 5.6 mm
AuxTel Data Collection
Data was taken on the nights of 5/25/2022 and 5/26/2022 (2 other nights were snowed out and the first night the M3 mirror mount wouldn't rotate - for the two nights of data collection we took data we rotated M3 manually).
Exposures range from 1/1000 s to 1s.
AuxTel SHWFS image analysis
The current analysis code is structured as follows (algorithm for any part can be easily changed):
- Color correction
- Background subtraction
- Find peaks/sources for each frame
- Find centroids of sources and errors on the centroids for each frame
- Link sources together between different frames
- Compute source positions and displacements relative to mean source position (relative to center of mass of frame)
- Convert source positions and displacements to meters and arcsec, respectively
- Do analysis (correlation measurements, rms of displacements in each frame, etc.)