This note details the studies that are included in the cal directories.

(LJB 11 January 2008)


1. adc

Data is from the study regcal014.
This study takes a 0 second full CCD exposure.
The data is used to calculate the ADC offset of the CCDs.
*Please note that this study has been replaced by study regcal074 which will
include the prescan pixels (this will allow a more accurate value of the
ADC offset to be measured) (LJB 21 June 2007).

2. dark

2.1 dark/ 0s_100s

Data is from the study regcal075.
This study takes 2 full CCD 0 second exposures and two full CCD 100 second exposures.
The middle 512 rows of the CCDs are used.

2.2 dark/bottom

Data is from the study regcal071.
This study takes 2 full CCD 100 second exposures using the bottom 512 rows
of the CCDs.
*Please note that the exposure time for this study was increased from 60 seconds
to 100 seconds on 22 November 2007.

2.3 dark/long

Data is from the study regcal016.
This study takes 8 full CCD exposures with the following integration times:
100, 100, 150, 150, 300, 300, 600, 600 seconds.
The middle 512 rows of the CCDs are used.

2.4 dark/prescan

Data is from the study regcal074.
This study takes 2 full CCD 100 second exposures.
The first 50 prescan pixels are included. The top 512 rows of the CCDs are used.

2.5 dark/reduced_long

Data is from the study regcal073.
This study takes 4 full CCD exposures with the following integration times:
100, 100, 150 and 150 seconds.
The middle 512 rows of the CCDs are used.

2.6 dark/short

Data is from the study regcal015.
This study takes 8 full CCD exposures with the following integration times:
1, 1, 10, 10, 30, 30, 60, 60 seconds.
The middle 512 rows of the CCDs are used.

2.7 dark/top

Data is from the study regcal072.
This study takes 2 full CCD 100 second exposures using the top 512 rows
of the CCDs.
*Please note that the exposure time for this study was increased from 60 seconds
to 100 seconds on 22 November 2007.

3. flat

3.1 flat/EUV

Data is from studies regcal067 and regcal068.
Regcal067 uses a QS pointing and 120 second exposures.
Regcal068 uses an AR pointing and 20 second exposures.

3.2 flat/long

Data is from the study regcal018.
This study takes 8 full CCD exposures (1 sec) with the following LED on times:
60, 60, 80, 80, 100, 100, 120, 120 seconds.
The middle 512 rows of the CCDs are used.

3.3 flat/overscan

Data is from the study regcal070.
This study takes 2 full CCD images with an LED on time of 100ms.
Overscan pixels are included. The top 512 rows of the CCDs are used.
*Please note that due to an oversight this study only included 1 exposure until
June 2007 (should be 2 exposures) and until 17 July 2007 prescan pixels were included
instead of overscan pixels.

3.4 flat/short

Data is from the study regcal017.
This study takes 8 full CCD exposures (1 sec) with the following LED on times:
0, 0, 10, 10, 20, 20, 40, 40 seconds.
The middle 512 rows of the CCDs are used.

4. intensity

Data is from the study regcal019.
This study takes a 100 second full CCD exposure pointing at the QS, using the
1" slit.
*Please note that since February 2007 this study has not been run as it is no
longer required (the eis synoptic study has replaced it).