Data reduction and calibration

Sky orientation & pixel scale

The as-designed pixel scale is 6 milliarcseconds per pixel in camsci1 and camsci2. The exact plate scale and distortion solution can potentially change by a small amount each time MagAO-X is (re-)installed at the telescope. We perform calibration observations to determine these values, and the detailed values for each run are (or will be) listed below.

2022B

To place north-up-east-left, rotate them CCW by PARANG. For data taken after October 2022, it is not necessary to flip either camsci1 or camsci2 image orientation .

Astrometric solution TBD.

2022A

For data taken in 2022A: both camsci1 and camsci2 images should be flipped left-to-right (i.e. in X) before analysis. To get north-up-east-left, you should rotate counter-clockwise by the angle given in PARANG in the headers after any necessary flips.

Astrometric solution TBD.

2019B

For data taken in 2019B: camsci1 frames should be flipped left-to-right. (i.e. in X). camsci2 images do not need to be flipped. To get north-up-east-left, you should rotate counter-clockwise by the angle given in PARANG in the headers after any necessary flips.

Astrometric solution TBD.