Different mosaic cameras ONE system Different mosaic cameras Multiple Controllers One shutter vfvfv Fiera 1 & 2 operate synchronously one mosaic half each (0ns) Fiera 3 operates four independent Auxiliary CCDs : First Software camera : Guiding G1 & G2 Second software camera : Image Analysis EF & IF

S C I E N C E M O S A I C 16 K x 16 K Image Analyser EF Guider 1 Image AnalyserIF Guider 2

SHUTTER CLOSED

Star& window coordinates for G1 G2 EF IF ASSUMPTION : The System has been set-up with all individual Star& window coordinates for G1 G2 EF IF CCDs have been wiped

OPENING SHUTTER NOW

Continuous LONG Time Integration on MOSAIC with OPEN shutter G1 EF IF Integrate with ‘electronic’ exposure time T1 Integrate with ‘electronic’ exposure time T2 >> T1 G1 EF Continuous LONG Time Integration on MOSAIC with OPEN shutter Integrate with IDENTICAL ‘electronic’ exposure time T2 >> T1 IF G2 Integrate with IDENTICAL ‘electronic’ exposure time T1

Readout pre-selected window CCD window G1 EF IF G2

Resulting Image (scaled up for demo) CCD window G1 EF IF G2

CCD window G1 EF IF G2 Resulting Image (scaled up for demo) CCD window Readout different pre-selected window

Continuous LONG Time Integration on MOSAIC with OPEN shutter CCD Resulting Image (scaled up for demo) CCD window Still integrating for typ. 30 sec. G1 EF Continuous LONG Time Integration on MOSAIC with OPEN shutter Still integrating for typ. 30 sec. CCD window IF G2 Resulting image (scaled up for demo)

The guiding loop starts again with OPEN Shutter G1 EF IF G2 Integrate with ‘electronic’ exposure time T1 Integrate with ‘electronic’ exposure time T2 >> T1 G1 EF The guiding loop starts again with OPEN Shutter Integrate with IDENTICAL ‘electronic’ exposure time T2 >> T1 IF G2 Integrate with IDENTICAL ‘electronic’ exposure time T1

Readout pre-selected window CCD window G1 EF IF G2

Resulting Image (scaled up for demo) CCD window G1 EF IF G2

CCD window G1 EF IF G2 Resulting Image (scaled up for demo) CCD window Readout different pre-selected window

Continuous LONG Time Integration on MOSAIC with OPEN shutter CCD Resulting Image (scaled up for demo) CCD window Still integrating for typ. 30 sec. G1 EF Continuous LONG Time Integration on MOSAIC with OPEN shutter Still integrating for typ. 30 sec. CCD window IF G2 Resulting image (scaled up for demo)

If 30 seconds are Over Pause guiding loop Readout pre-selected Resulting Image (scaled up for demo) CCD window Still integrating for typ. 30 sec. G1 EF If 30 seconds are Over Pause guiding loop Readout pre-selected individ. windows of Image Analyzers sequentially Still integrating for typ. 30 sec. CCD window IF G2 Resulting image (scaled up for demo)

Continuous LONG Time Integration on MOSAIC with OPEN shutter G1 EF IF PAUSE G1 EF Continuous LONG Time Integration on MOSAIC with OPEN shutter IF G2 PAUSE

Continuous LONG Time Integration on MOSAIC with OPEN shutter G1 EF IF Read Window PAUSE G1 EF Continuous LONG Time Integration on MOSAIC with OPEN shutter IF G2 PAUSE

Resulting Image (scaled up) PAUSE G1 EF Continuous LONG Time Integration on MOSAIC with OPEN shutter IF G2 PAUSE

Resulting Image (scaled up) PAUSE G1 EF Continuous LONG Time Integration on MOSAIC with OPEN shutter IF G2 Read Window PAUSE

Continuous LONG Time Integration on MOSAIC with OPEN shutter G1 EF IF Resulting Image (scaled up) PAUSE G1 EF Continuous LONG Time Integration on MOSAIC with OPEN shutter IF G2 Resulting Image (scaled up) PAUSE

and the 30 sec. Integration on the Image Analyzers Resulting Image (scaled up) PAUSE G1 EF AND NOW : The Guiding Loop and the 30 sec. Integration on the Image Analyzers starts all over again with open shutter IF G2 Resulting Image (scaled up) PAUSE

continues until the exposure time on the MOSAIC is over Integrate with ‘electronic’ exposure time T1 Integrate with ‘electronic’ exposure time T2 >> T1 G1 EF This whole process of Guiding Loop & Image Analysis Loop continues until the exposure time on the MOSAIC is over Integrate with IDENTICAL ‘electronic’ exposure time T2 >> T1 IF G2 Integrate with IDENTICAL ‘electronic’ exposure time T1

CLOSE SHUTTER NOW G1 EF IF G2 Integrate with ‘electronic’ exposure time T1 Integrate with ‘electronic’ exposure time T2 >> T1 G1 EF CLOSE SHUTTER NOW Integrate with IDENTICAL ‘electronic’ exposure time T2 >> T1 IF G2 Integrate with IDENTICAL ‘electronic’ exposure time T1

SHUTTER CLOSED