OPPORTUNITY TO USE S-CAM ON THE WHT


               S-CAM ON THE WHT IN SEMESTER 2003B

Michael Perryman (ESA) advises that he will make the new 10x12-pixel
S-CAM available on the WHT in 2003B.  Observers interested in 
collaborative use of the instrument are invited to contact him before 
the end of 2002.
His email is: 
   mperryma@rssd.esa.int

The S-CAM web page is on:
   http://astro.estec.esa.nl/SA-general/Research/Stj/

S-CAM is based on the principle that a UV/optical/IR photon can break 
Cooper pairs in a superconductor and release an electron packet of size
proportional to the photon energy.  This makes possible high-speed 
photon counting, in which the arrival time and the photon energy are 
measured simultaneously. 
The system provides high QE over a broad wavelength range, with zero
readout noise.

Summary of detector properties:
 Detector area: 10 x 12 pixels, 0.8 arcsec/pixel
 Wavelength coverage: 350-750 nm
 Wavelength resolution: ~10 at 500 nm
 Photon arrival time tagging to about 1 microsec
 Count rate: (very approx) 200 counts/s at V=18 in V band
 Bright magnitude limit: about V = 14 (brighter requiring ND filters)


Publications:

Optical STJ Observations of the Crab Pulsar, 
  Perryman et al, 1999, AA, 346, L30

S-Cam: an Imaging Spectrophotometer Based on Superconducting Tunnel Junctions,
  Rando et al, 2000, Experimental Astronomy, 10, 499

High-Speed Energy-Resolved STJ Photometry of the Eclipsing Binary UZ For,
  Perryman et al, 2001, MNRAS, 324, 899

Direct Determination of Quasar Redshifts, 
  de Bruijne et al., 2002, AA, 381, L57

Eclipse Mapping of HU Aqr from STJ Observations, 
  Bridge et al., 2002, MNRAS, in press

High-speed energy-resolved STJ photometry of the eclipsing dwarf nova IY UMa,
  Steeghs et al., 2002, MNRAS, in press



ING-IAC CONFERENCE ON SATELLITES AND TIDAL STREAMS


                     ING-IAC  joint conference

                    SATELLITES AND TIDAL STREAMS

                          May 26-30, 2003
                   La Palma, Canary Island, Spain

* Scientific Advisory Committee:

A. Burkert (Germany), M. Irwin (UK), A. Klypin (USA),
D. Martinez-Delgado (Spain, co-chair),  S. Majewski (USA),
M. Mateo (USA), F. Prada (Spain, co-chair), R. Rebolo (Spain),
P.  Schneider (Germany) and R. Zinn (USA)

* Local Organizing Committee:

F. Prada (chair), D. Martinez-Delgado, R. Corradi, J. Mendez, A. Zurita
J. de Araoz, T. Karthaus, E. Bejarano

* Principal Topics:

   - Satellites of galaxies: bright and dark
   - The dark matter content of dSph and LSB galaxies
   - Tidal streams: probes of the structure and
       formation of the Milky Way and other Nearby Large Galaxies
   - Predictions of Cold Dark Matter models on small scales
   - Compact HVCs and galactic substructure
   - Mass substructure from gravitational lensing

* Contact:    Francisco Prada & David Martinez-Delgado.
   Email:  sattail@iac.es

* 1st announcement due to November 12th, 2002


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