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Knowledgebase: IRAC
What were the IRAC FLUXCONV values (the BCD header value showing the conversion from MJy/sr to DN/sec) in the different IRAC pipeline processing versions?
Posted by Seppo Laine on 21 November 2008 12:28 PM
In general, users should trust the FLUXCONV values in the headers of the
IRAC data FITS files that they have. Here is a brief summary of the changes
in the FLUXCONV values throughout the Spitzer mission.

Warm Mission S18.18 and S19 pipelines:

ch1 FLUXCONV = 0.1253
ch2 FLUXCONV = 0.1469

Cryogenic Mission S18.18 (final processing) pipeline:

ch1 FLUXCONV = 0.1069
ch2 FLUXCONV = 0.1382
ch3 FLUXCONV = 0.6054
ch4 FLUXCONV = 0.2083

S13.0 - S18.14 pipelines:
-----------------
ch1 FLUXCONV = 0.1088
ch2 FLUXCONV = 0.1388
ch3 FLUXCONV = 0.5952
ch4 FLUXCONV = 0.2021

S11.0 through pre-S13.0 pipelines:
-----------------
ch1 FLUXCONV = 0.1104
ch2 FLUXCONV = 0.1390
ch3 FLUXCONV = 0.6024
ch4 FLUXCONV = 0.2083

Pre-S11.0 pipelines:
--------------------
ch1 FLUXCONV = 0.1125
ch2 FLUXCONV = 0.1375
ch3 FLUXCONV = 0.5913
ch4 FLUXCONV = 0.2008