Detector information for the MMT Blue and Red Channel Spectrographs

This page summarizes basic properties of the CCDs used in the MMT Blue and Red Channel spectrographs. These CCDs were produced by the UA Imaging Technology Lab and this information was previously hosted on the ITL website. For information on using the spectrographs, optical properties, etc, please visit the instrument webpages on the MMT website: Blue and Red Channel spectrographs.

Blue Channel detector

• IRAF detname: mmtbluechan
• Characterized 10Aug06 @ ITL
• Gain: - 2.20 e-/DN (gain=1) and 1.12 e-/DN (gain=2)
• More Gain Info
• Noise ≈ 2.45 e-
• Full Well ≈ 129,000 e- unbinned
• Dark Current ≈ 2 e-/pixel/hour, click for more dark current info
• Operating CCD temperature: -135C
• QE Curve
• HCTE (@1620 e): 0.999995
• VCTE (@1620 e): 1.000000
• ARC Gen1 camera controller
• Device type: STA0520A
• Pixels: 2688×512 15×15 microns
• Detector serial number - sn3735
• This device was previously called ccd35
• Old detector info file

Red Channel detector

• IRAF detname: mmtredchan
• CCD replaced in Red Channel dewar August, 2009
• CCD replaced in Red Channel dewar April, 2012
• Noise: ~4 e
• HCTE: ~1
• VCTE: ~1
• Operating Temperature: -135 C
• Dewar hold time: ~11.5 hours
• Gain 2.5 e/DN or 1.2 e/DN
• CCD type: STA1759A, 100 um thick, fully depleted

Information from Mike Lesser at ITL, moved to MMT by Ben Weiner, bjw@mmto.org