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Polarization photos

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Contact: Steve Koppes
Note: Files are large

[polmap]
DASI Collaboration, 2002
JPEG file, 2407x2000 pixels (33.43x27.78 inches) @ 72.00 pixels/inch

An image of the intensity and polarization of the cosmic microwave background radiation made with the Degree Angular Scale Interferometer (DASI) telescope. The small temperature variations of the cosmic microwave background are shown in false color, with yellow hot and red cold. The polarization at each spot in the image is shown by a black line. The length of the line shows the strength of the polarization and the orientation of the line indicates the direction in which the radiation is polarized. The size of the white spot in the lower left corner approximates the angular resolution of the DASI polarization observations.
[DASI]
Photo by Erik Leitch, 2002
JPEG file, 788x1200 pixels (10.94x16.67 inches) @ 72.00 pixels/inch

The Degreer Angular Scale Interferometer (DASI) in its ground shield on top of the Martin A. Pomerantz Observatory (MAPO).
[dome entrance]
Photo by Erik Leitch, 2002
JPEG file, 2000x1312 pixels (27.78x18.22 inches) @ 72.00 pixels/inch

The entrance to the Amundsen-Scott research station at the South Pole.
[sunshield]
Photo by Erik Leitch, 2002
JPEG file, 2000x1312 pixels (27.78x18.22 inches) @ 72.00 pixels/inch

DASI sun shield. The reflective panels in the background are the interior of the ground shield.  This is DASI's most recent facelift -- this photo was taken in Feb 2002.
[MAPO]
Photo by Stephanie Rowatt, 2001
JPEG file, 1536x1024 pixels (21.33x14.22 inches) @ 72.00 pixels/inch

MAPO observatory, with the DASI ground shield open.  The cone in the background is the shield enclosing the Viper telescope.
[open shield]
Photo by Stephanie Rowatt, 2001
JPEG file, 1595x1047 pixels (22.15x14.54 inches) @ 72.00 pixels/inch

An aerial shot of the interior of the DASI ground shield and Erik Leitch.
[open shield]
Photo by Stephanie Rowatt, 2001
JPEG file, 1183x677 pixels (16.43x9.40 inches) @ 72.00 pixels/inch

(cropped version of the same)
[group photo]
Photo by Stephanie Rowatt, 2001
JPEG file, 2000x1312 pixels (27.78x18.22 inches) @ 72.00 pixels/inch

End of summer season, 2001, inside the DASI ground shield, after outfitting the telescope with polarizers.  From left to right: Ben Reddall (in shadow), Charlie Kaminski, Clem Pryke, John Kovac, Erik Leitch.

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