Program: GN-2009B-DD-4

We have recently discovered the unambigous optical counterpart of SGR 0501+4516, based in part on our deep Gemini imaging. It lies close to a galactic supernova remnant (HB9) suggesting a physical assocition, and moderate proper motion. Our previous NIRI observations, obtained 6 months apart provide tentative support for this (a ~1.8 sigma detection of proper motion). Our proposed new NIRI observation will provide a time baseline of ~14 months, and will pin down the proper motion offering the possibility to conclusively associate the SGR with the SNR, measure its age in a model independent manner, and determine its spatial velocity in comparison for natal kick models for magnetic systems. Finally, they will provide a accurate current measure of the K-band magnitude, which is critical for our ongoing observational campaign, in particular for tuning strategies for rapid photometry with Spitzer.