Japan Aerospace Exploration Agency
Institute of Space and Astronautical Science

AKARI/IRC Data Reduction Support Page

Last Update : 10/01/27

What's New!

2010/01/27: [Tool] (Bug fix) IRC Imaging toolkit for Phase 3 does not work for data in 2010.
2010/01/14: [Info] [Corrected!] Sensitivity change in Phase 3.
2010/01/05: [Info] Ghosts in MIR-L data
2010/01/05: [Info] Sensitivity change in Phase 3.
2009/12/03: [Cal.] New IRC Imaging toolkit for Phase 2 observations is released.
2009/12/03: [Cal.] New responsivity for the spectroscopic mode in Phase 3 is available.
2009/12/03: [Info] Summary of the Phase 3 workshop on November 13th, 2009 is now available.
2009/08/26: [Docs] IRC Data Users Manual (IDUM) for Phase 3 version 1.1 released.
2009/08/24: [Info] Photometric conversion factors for Phase 3 observations.
2009/05/01: [Info] Aperture correction factor for IRC photometry.
2009/04/23: [Info] On the systematic error of the IRC/NIR photometry.[Important!]
2009/04/07: [Tool] Imaging/Spectroscopy Toolkit for Phase 3 data are now available.
2009/04/07: [Docs] IRC Data Users Manual (IDUM) for Phase 3 version 1.0 released.
2009/04/07: [Tool] Spectroscopy Toolkit for Phase 1 & 2 is updated.

[Important information]

Sensitivity change in Phase 3 (2010/01/14)[Corrected!]
There were a typo in the sensitivity correction parameter. We apologize for your inconveniences.
Ghosts in MIR-L data (2010/01/05)[New!]
AKARI Phase 3 Workshop: November 13, 2009 [2.3 MB] (2009/12/03)
An overview of the Phase 3 workshop held on November 13th (Friday), 2009 together with the current and expected performance of the IRC in the next year are summarized.
New Response for IRC Phase 3 Spectroscoppic data (2009/12/03)[New!]
Aperture Correction factor for IRC photometry. (2009/05/01)
On the systematic error of the IRC/NIR photometry. (2009/04/23)

[Presentation files for the AKARI Data Reduction Workshops]

AKARI Data Reduction Workshop on September 18, 2007 at ESAC
Causion:The information in the following presentations is not always relevant to Phase 3 data.

IRC Data and Imaging Toolkit [4.1 MB](Ita)
The IRC Spectroscopy: Data and their Calibration [4.4 MB](Ohyama)
Questions and Answeres [2007/09/28]

IRC Data Reduction Workshop on June 20, 2006 at ISAS

IRC Data and Imaging Pipeline [3.6 MB](Ita)
The IRC Spectroscopy: Data and their Calibration [5.5 MB](Ohyama)

[Software Packages]

Imaging data reduction
- [2010/01/27] We find that the imaging tookit for Phase 3 does not work for the data taken in 2010. The program irc_p3/prepipeline.cl does not get proper date information because of a minor bug. If you already install the software (irc_p3_20081015.tar.gz), replace irc_p3/prepipeline.cl with the following bug corrected version. [prepipeline.cl.1001262220.gz]
- IRC Imaging Toolkit for Phase 3 data Version 20081015 PL1 [9.9MB] (Y. Ita, T. Wada et al.)[2010/01/27] [Change Log] This package includes the above bug fix.
  (this version is used to process the current archive data package.)
  (Use version 20091022 below for Phase 1 & 2 data)
- IRC Imaging pipeline version 20091022 [13.7MB; Y. Ita, T. Wada et al.] (2009/12/03)[New!] See README for details and installation.
- Older Versions
System requirement
IRAF 2.12.2 or later
gcc version 3.2 or later
perl
Spectroscopic data reduction
- (Officially supported version for Phase 3)
  IRC Spectroscopy Toolkit for Phase 3 data Version 20090211 [40MB; Y. Ohyama et al.] (2009/04/07)
  (this version is used to process the current archive data package.)
  (Use the toolkit below for Phase 1 & 2 data)
- (Officially supported version for Phase 1 & 2 data)
  IRC Spectroscopy Toolkit Version 20090211 [24MB; Y. Ohyama et al.] (2009/04/07)
  [Change Log]
- (Archive processed version)
  IRC Spectroscopy Toolkit Version 20070913 [26MB] (Y. Ohyama, T. Wada et al.) [Information updated 2008/06/21]
  (this version was used to process the current archive data package, and should be used only for compatibility check purposes).
- Older Versions
System requirement
IDL (Software is developed on IDL 6.3. May work on 6.*.)

[Calibration Data]

New Response for IRC Phase 3 Spectroscoppic data (2009/12/03)[New!]
Photometric conversion factors for Phase 3 observations (2009/08/24)[New!]
Revisions of the IRC conversion factors (2007/11/12)
The following information is for the old version (20070104) software. The latest software package (20070912) does not need it as the proper flat data are included and appropriate file is selected automatically.
Flat data for observations after 2007-01-07 02:49:00 [667kB; 2007/04/04]
We have noticed that the flat pattern for the MIR-S channels changed at 2007-01-07 02:49:00. The pattern in the lower right corner disappeared after this epoch. For observations before this epoch, the flat data in the pipeline should be good enough though we are already aware that the pattern varies a little with time and are trying to prepare better flats depending on the observation time. Observations after this epoch should use the new flats for MIR-S.
We are planning to include the flat data in each observation, but at this stage you can replace the flats either by
(1) replacing the fits files in irc/lib/flat directory.
or
(2) changing the entries of flat in constants.database in irc/lib.

[Data User's Manual]

AKARI IRC Data Users Manual for Phase 3 ver.1.1 (2009/08/26) [PDF (4.3MB)] [ps.gz (8.6MB)] [Change Log]
AKARI IRC Data Users Manual ver.1.4 (2008/06/03) [PDF (2.6MB)] [ps.gz (6.7MB)]

[Tips and FAQs]

Bugs with IRAF 2.14 [07/12/26]
IRC Data Reduction Questions and Answers [PDF] [Updated 07/12/20]
This document will be included in the next version IDUM.

ESAC Helpdesk for European Users
ISAS Helpdesk For Japanese/Korean Users and General Inquiry (iris_help @ ir.isas.jaxa.jp)

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iris_help @ ir.isas.jaxa.jp