Three-Color Laser Guide Star Movie of the Galactic Center

This three color animation, centered on Sgr A*-IR shows, for the first time ever, the broadband color of Sgr A*-IR throughout an outburst. The image is 1 arcsec on a side and covers about two hours of observations. For this false color animation, H (1.8 microns) = blue, K' (2.1 microns) = green, and L' (3.8 microns) = red. The animation was created from data obtained at the W. M. Keck Observatory using the Laser Guide Star Adaptive Optics System.


Additional Sgr A* Movies:
  • 3.8 micron (L') movie of Sgr A* showing brightness variations

  • References and Credit:
    A Constant Spectral Index for Sagittarius A* during Infrared/X-ray Intensity Variations S. D. Hornstein, K. Matthews, A. M. Ghez, J. R. Lu, M. Morris, E. E. Becklin, M. Rafelski, F. K. Baganoff, 2007, ApJ, 667, 900
    UCLA Galactic Center Group
    W.M. Keck Observatory Laser Team