Correcting transients in unchopped PACS/Herschel spectroscopy

Dario Fadda (California Institute of Technology), Jeffery Douglas Jacobson (California Institute of Technology)

Abstract

We present a technique to correct long-term transients in the signal

from unchopped spectroscopy with the PACS instrument onboard the

Herschel Space Observatory. This kind of transients affects the

response of the detector after every big variation of the incident

flux and lasts up to 6 minutes. The effect is particularly pronounced

in the case of the red array whose response can vary up to 20%, while

is less important in the case of the blue array. Correcting these

transients is critical especially in the case of short observations

since they can affect a large fraction of the observation. A module to

correct long-term transients has been developed in Jython and it is

part of the data reduction software for Herschel, HIPE, since version

7.0.

Paper ID: P042

Poster Instructions