| |||
|
Home > Public Information > ING Newsletter > No. 6, October 2002 > Telescopes and Instrumentation |
|
INGRID | SCIENCE |
|
|
|
Other available formats: PDF
ULTRACAM Successfully Commissioned
on the WHT Vik Dhillon (Univ. of Sheffield), Tom Marsh (Univ. of Southampton) and the ULTRACAM team* |
|
|
|
Figure 1. Left: ULTRACAM mounted on
the Cassegrain focus of the WHT. [ JPEG | TIFF ] Right: The ULTRACAM commissioning team, from
left-to-right: Mark Stevenson (Sheffield), Paul Kerry (Sheffield), Tom Marsh
(Southampton), Marco Azzaro (ING), Vik Dhillon (Sheffield), Andy Vick (UKATC),
David Atkinson (UKATC), Carolyn Brinkworth (Southampton). [ JPEG | TIFF ] |
Figure 2. Left: Schematic showing the
light path through ULTRACAM. [ JPEG | TIFF ] Right: ULTRACAM in the test focal station at
the WHT, just prior to mounting on the telescope (courtesy Sue Worswick).
[ JPEG | TIFF ] |
Figure 3. Light curve of the eclipsing polar HU
Aqr, which consists of a white dwarf accreting material onto its magnetic
poles from a red dwarf companion star. The light curve shows intense flickering
from the accreting poles and the eclipse of the poles (the 2-3 second transition
into eclipse). [ JPEG | TIFF
] |
Figure 4. Light curve of the eclipsing white-dwarf/red-dwarf
binary NN Ser. Each point on the graph represents a 2 sec exposure. The upper
panel shows the u', g' and r' flux versus time. The rise in the centre of
the curve is due to a reflection effect, where the irradiated inner hemisphere
of the cooler star comes into view. The lower panel is an expanded plot of
the eclipse. The eclipse is due to the obscuration of the hot white dwarf
by the cool red dwarf and will be used to measure the masses and radii of
the two stars (using a full light curve fit) and the rate at which the orbital
period of the binary is decreasing. [ JPEG | TIFF ] |
|
|
Figure 5. Left: Light curve of the
pulsating sdB star KPD2109+4401 obtained by Simon Jeffery (Armagh) for use
in his ULTRACAM asteroseismology project. [ JPEG
| TIFF ] Right: Image of the Crab Nebula, obtained
by combining the simultaneous u', g' and r' ULTRACAM images. Fast data on
the Crab Pulsar at the centre of this image were obtained in order to calibrate
the accuracy of the ULTRACAM GPS time-stamping. [ JPEG
| TIFF ] |
Top | Back |
|