instrumentation t80cam jpcam

Instrumentation

First light instruments are being designed to exploit the survey capabilities of the OAJ telescopes. In particular, a wide field camera has been developed for the JAST/T80 and another one is being developed for the JST/T250.

The following table summarizes some basic parameters of the instruments.

JPCam T80Cam
FoV 1.4º
EE50 Ø =11 μm Ø =6 μm
EE80 Ø =22 μm Ø =13 μm
CCD format (14x) 9,216 x 9,232 pix, 10 μm/pix 9,216 x 9,232 pix, 10 μm/pix
Pixel scale 0.2267 “/pix 0.55 “/pix
Read out time 12s 12s
Read out noise 4 e- (RMS) 3.4 e- (RMS)
Number of filters 70 12

T80Cam mounted at the JAST/T80 Cassegrain focus

T80Cam mounted at the JAST/T80 Cassegrain focus

The scientific instrument for the JAST/T80 telescope and for J-PLUS is T80Cam, a wide-field camera installed at the Cassegrain focus. It is equipped with a 9.2k-by-9.2k, 10μm pixel, high efficiency CCD that is read from 16 ports simultaneously, allowing read times of 12s with a typical read noise of 3.4 electrons (RMS). This full wafer CCD covers a large fraction of the telescope’s field of view (FoV) with a pixel scale of 0.55"/pixel.

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JPCam conceptual design (credit: Fernando Santoro, J-PAS collaboration)

JPCam conceptual design (credit: Fernando Santoro, J-PAS collaboration)

JPCam is a wide field 14 CCD-mosaic camera that will be installed at the Cassegrain focus of the JST/T250. It is intended for surveys with JST/T250 starting with the planned J-PAS. The mosaic of 14 large format CCDs covers a large fraction of the JST/T250 FoV with a pixel scale of 0.2267"/pixel.

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