Suprime-Cam CCDs (MIT)

The information of this page is about MIT CCD, which is used for Suprime-Cam till 2008/07.

Suprime-Cam has ten MIT/LL 2048x4096 CCDs arranged in a 5x2 pattern, providing a field of view of 34' x 27'. The following plot shows the quantum efficiency of a typical CCD.

Small gaps exist between the CCDs due to the coplanarity requirement at the prime focus of Subaru Telescope. The following diagram indicates the approximate sizes of the interchip gaps. Note that the left-top chip has a lower Q.E. (about 60%) than the other chips.

DET_ID
DETECTOR 0
w67c1 16-17" 1
w6c1 16-17" 5
si006s 16-17" 4
si002s 16-17" 9
w7c3
3-4''
6
w93c2 16-17" 7
w9c2 16-17" 2
si005s 16-17" 3
si001s 16-17" 8
w4c5

Data from each individual chip are stored separately, and thus one image from Suprime-Cam consists of ten FITS files. Each chip has a one-digit detector ID, recorded in the FITS keyword DET_ID. Each chip also has a "call name" consisting of a series of characters and numbers which are recorded in the FITS keyword DETECTOR. DET_ID corresponds to the final digit of the FRAMEID which is a sequencial number (SUPA***) assigned to each FITS file in the data archive system STARS/MASTARS and SMOKA (e.g., DET_ID=8 for FRAMEID=SUPA00157008).