Sandiford Echelle Spectrograph dark frames, April 3 2025
RA2 SPECS
PARAMETER VARIABLE
STANDARD IMAGE IMT31
ARRAY SIZE 1200 x 400
PIXEL SIZE 27 um
GAIN 1.5 e- ADU
READOUT NOISE 7.2 e-
BIAS LEVEL 4200
MAX COADD 4x4
OPERATING TEMP -115
SPURIOUS CHARGE
DARK GEN. RATE
READ TIME (1x1) 35 seconds
WAVELENGTH RQE
400 48%
500 47%
600 59%
700 55%
800 48%
900 30%
1000 10%
RA2 DARKS April 3, 2025
Notes: the CCD was cooled but not prepared with the O2+Ultraviolet treatment. I used Integrator 1 (slow) and a total of 23 darks, ranging from 0s (zero) to 40 minutes. These are DS9 screenshots made with the standard LINEAR+ZSCALE settings selected from the zip folder below.
ZERO
60s
600s
1200s
2400