FORS1 Pipeline: Recipe for BIAS reduction

FORS1 Pipeline
Recipe for BIAS reduction

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recipe name:FORS_BIAS
input frames: BIAS
associated templates: FORS1_img_cal_bias

purpose: Creates a master bias from a set of bias frames.

description: The master bias is created from a set of raw bias frames, for which the highest and the lowest value for each pixel are rejected and the average of the remaining pixels is computed. The recipe should therefore not be used on fewer than 5 raw bias frames. The overscan regions, if present, are removed from the result. The master frame has 2 extensions, with the actual product being in the first extension and its errors being in the second extension.

At the end, the new master frame is compared with the corresponding certified master frame from the calibration database.

products:

Master PS GIF Header

F1_MBIA_080412A_C1_100Khi_2x2

F1_MBIA_080412A_C2_100Khi_2x2
F1_MBIA_080412A_C1_200Klo_2x2
F1_MBIA_080412A_C2_200Klo_2x2
F1_MBIA_080412A_C1_200Klo_1x1
F1_MBIA_080412A_C2_200Klo_1x1
F1_MBIA_080412A_C1_625Klo_2x2
F1_MBIA_080412A_C2_625Klo_2x2