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.
|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|
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.
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.