MRC 1138-262, Spiderweb Galaxy, B1 1138-26
This image was created from HST data from proposal 10327: H. Ford (Johns Hopkins University), G. Miley (Leiden Observatory), A. Zirm (Johns Hopkins University), R. Overzier (Leiden Observatory), W. Sparks (STScI), and H. Tran (California Association for Research in Astronomy).
The science team is comprises: G. Miley and R. Overzier (Leiden Observatory), A. Zirm and H. Ford (Johns Hopkins University), J. Kurk (Max Planck Institute for Astronomy, Heidelberg), L. Pentericci (INAF/Observatory of Rome), J. Blakeslee (Washington State University), M. Franx (Leiden Observatory), G. Illingworth (Lick Observatory/University of California, Santa Cruz), M. Postman (STScI), P. Rosati (European Southern Observatory, Garching), H. Rottgering (Leiden Observatory), B. Venemans (Institute for Astronomy, Cambridge), and E. Helder (Leiden Observatory).
F475W (SDSS g) and F814W (I)
This image is a composite of many separate exposures made by the ACS instrument on the Hubble Space Telescope using several different filters. Two filters were used to sample broad and narrow wavelength ranges. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are:
Blue: F475W (SDSS g)
Green: F475W (SDSS g) + F814W (I)
Red: F814W (I)