In cfhtIsrTask.py the readout noise for amp A and amp B is set from the values stored in the raw image fits header identified by the keywords RDNOISEA and RDNOISEB. Typically the noise level is ~5 electrons. For some old CFHT images acquired in 2004, RDNOISEA/B is equal to 65535. In these cases, the parameter identified by the keyword RDNOISE is nevertheless correct.
cfhtIsrTask.py should be modified to use RDNOISE instead of RDNOISEA/B when this situation happens.
|Field||Original Value||New Value|
|Reviewers||Simon Krughoff [ krughoff ]|
|Status||To Do [ 10001 ]||In Review [ 10004 ]|
|Status||In Review [ 10004 ]||Reviewed [ 10101 ]|
|Resolution||Done [ 10000 ]|
|Status||Reviewed [ 10101 ]||Done [ 10002 ]|