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 JAST80 and another one is being developed for the JST250.

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 JAST80 Cassegrain focus

T80Cam mounted at the JAST80 Cassegrain focus

The scientific instrument for the JAST80 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 JST250. It is intended for surveys with JST250 starting with the planned J-PAS. The mosaic of 14 large format CCDs covers a large fraction of the JST250 FoV with a pixel scale of 0.2267"/pixel.

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