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[ascl:1205.006] Flexion: IDL code for calculating gravitational flexion

Gravitational flexion is a technique for measuring 2nd order gravitational lensing signals in background galaxies and radio lobes. Unlike shear, flexion directly probes variations of the potential field. Moreover, the information contained in flexion is orthogonal to what is found in the shear. Thus, we get the information "for free."

Code site:
http://www.physics.drexel.edu/~goldberg/flexion/
Used in:
http://adsabs.harvard.edu/abs/2007ApJ...666...51L
Bibcode:
2012ascl.soft05006G

Views: 1676

ascl:1205.006
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