Difference: SpireCalibrationWeb (73 vs. 74)

Revision 742013-01-22 - LucaConversi

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META TOPICPARENT name="WebHome"

SPIRE instrument and calibration web pages

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Software and documentation

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  • HIPE (Herschel Interactive Processing Environment): The latest User Release HCSS version that you should use for reducing SPIRE data is HIPE v9.2.0. It can be downloaded from: http://herschel.esac.esa.int/HIPE_download.shtml. This corresponds to the developer's CIB (Continuous Integration Build) HIPE 9.0 build 3089.
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  • HIPE (Herschel Interactive Processing Environment): The latest User Release HCSS version that you should use for reducing SPIRE data is HIPE v10.0. It can be downloaded from: http://herschel.esac.esa.int/HIPE_download.shtml. This corresponds to the developer's CIB (Continuous Integration Build) HIPE 10.0 build 2747.
 
    • Warning, important Please note that there was a bug in the destriper task included in HIPE 9.0 that may affect your final map, especially if there are bright objects in the observed field. This has been corrected since HIPE 9.1. If your observation falls in the mentioned category, you are strongly advised to update your HIPE installation.

  • We also provide access to the latest stable developer build (latest stable CIB).
    • Beware These developer builds do not undergo the same in-depth testing as the user releases do. The latest developer build can be found here.

  • Within HIPE you can access all the SPIRE data reduction and HIPE-user documentation. The SPIRE Data Reduction Guide (SDRG) follows the user pipeline scripts and also explains the details of pipeline processing and data analysis. It is also available online here:
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  • SPIA: The SPIRE Photometer Interactive Analysis (SPIA) package is available as a plug-in for HIPE. SPIA provides a structured GUI based access to the more intricate parts of the scan map photometer pipeline for SPIRE without the immediate need to resort to scripts. More information can be found in the SDRG or on the SPIA web page
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Overview

The best source of information for reducing SPIRE Photometer data is the SPIRE Data Reduction Guide available through the HIPE help. This runs through the User Pipeline scripts step by step, describes several other Useful Scripts, and offers advice for specific issues that might be encountered.
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  • Note that SPIRE maps are in units of Jy/beam, and are calibrated in the assumption of a point source having a spectral index equal to -1, i.e. νSν = const. To calibrate your data for other cases or convert to e.g. Jy/sr, please refer to section 5.2 of the SPIRE Observers' Manual .

  • The SPIRE Photometer filter transmission curves, also known as Relative Spectral Response Functions (RSRF) are available here. For more details, please read the .readme file in this ftp folder.
 

New definition of Leve2 products

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  • For versions of the HCSS prior to HIPE 10.0, a single point source calibrated (Janskys/beam) map was provided in the Level 2 product for each of the PSW, PMW, PLW bands. However, for observations processed with HIPE 10.0 or later, more than one map calibration is made available within the Level 2 product. Maps are provided for the following scenarios for post HIPE 10.0 processing;
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  • For versions of the HCSS prior to HIPE 10.0, a single point source calibrated (Jy/beam) map was provided in the Level 2 product for each of the PSW, PMW, PLW bands. However, for observations processed with HIPE 10.0 or later, more than one map calibration is made available within the Level 2 product. Maps are provided for the following scenarios for post HIPE 10.0 processing:
 

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Extended Emission Destriper Diagnostic extdPSWdiag -
     
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  • psrcPxW are the previous PxW maps, calibrated for point source and in units of Jy/beam. Note that to do aperture photometry on such maps you'll first need to convert them to surface brightness (Jy/pixel, MJy/sr, etc.), although it is suggested to directly use the already extended emission calibrated extdPxW maps. Finally, bear in mind that SPIRE itself cannot measure the absolute sky flux, hence psrcPxW maps have an arbitrary offset having zero median.

  • ssoPxW maps are corrected for SSO proper motion: maps are in Jy/beam and they are subject to the same photometry rules of the psrcPxW maps.

  • extdPxW maps are calibrated for extended emission and provided in units of MJy/sr. These maps are provided with an estimation of the absolute offset via cross-calibration with Planck data.

  • In all cases, SPIRE data is calibrated in the assumption of source having a spectral index equal to -1, i.e. νSν = const. To calibrate your data for other cases or convert to e.g. Jy/sr, please refer to section 5.7 of the SPIRE Data Reduction Guide.

  • The SPIRE Photometer filter transmission curves, also known as Relative Spectral Response Functions (RSRF) are available here. For more details, please read the .readme file in this ftp folder.
 

Data Processing Issues

The main issues that you might find in your data are: undetected glitches, thermistor or detector jumps, and bad baseline removal.

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SPIRE Calibration Tree Applicable HIPE Version Comment
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SPIRE_CAL_9_1 HIPE v9 Final v9 cal tree, currently used in operations.
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SPIRE_CAL_10_1 HIPE v10 Calibration tree currently used in operations
SPIRE_CAL_9_1 HIPE v9 Final v9 cal tree
 
SPIRE_CAL_8_1 HIPE v8 Final v8 cal tree
SPIRE_CAL_7_0 HIPE v7 Final v7 cal tree.
SPIRE_CAL_6_1 HIPE v6 Final v6 cal tree
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 Contact the Helpdesk

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