Barron demonstrated that he can determine approximately the date an image was taken, using the proper motions of the moving stars. His test was a real image of the Beehive cluster we found on the web. This is great: Not only can we calibrate the astrometry of your image based on the image pixels alone, we can also calibrate the clock! The precision is going to depend on the field size and the proper motion distribution that happens to exist in the field of view.
Group meeting was Blanton telling us what he learned in Spain about massive spectroscopy projects underway in the next few years. The Astro seminar was Alison Farmer (Harvard) describing a plasma-physics solution to some oddities about Saturn's rotation and radio emission.
No comments:
Post a Comment