The Sunyaev-Zeldovich Effect at 1 and 2 mm towards ROSAT Clusters

Details The Sunyaev-Zeldovich Effect at 1 and 2 mm towards ROSAT Clusters The Sunyaev-Zeldovich Effect at 1 and 2 mm towards ROSAT Clusters

1996-08-28

arxiv.org/abs/astro-ph/9608187v1

Astronomy and Astrophysics

Astrophysics

6 pg Latex file (style file included) including 1 ps figure, XVIth Moriond Astrophysics Meeting "The Anisotropies of the Cosmi

Scientific paper

An observing campaign was devoted to the search for the Sunyaev-Zeldovich (S-Z) effect towards X-ray ROSAT Clusters in the millimetric spectral domain. A double channel (1.2 and 2 {\it mm}) photometer was installed at the focus of the 15m Swedish ESO Submillimeter Telescope (SEST) in Chile in september 1994 and 1995 and observations of the targets S1077, A2744, S295 and RXJ0658-5557 were gathered. Detections were found for A2744 at 1 {\it mm} and in both channels (at 1.2 and 2 {\it mm}) towards RXJ0658-5557. For the first time there is evidence for the S-Z enhancement and both the latter and the decrement were detected on the same source. We discuss astrophysical and systematic effects which could give origin to these signals.

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