Difference: SpireCalibrationWeb (122 vs. 123)

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SPIRE instrument and calibration web pages

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Documents explaining SPIRE

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A quick guide to the SPIRE instrument is provided in the SPIRE fact sheet
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A quick guide to the SPIRE instrument is provided in the SPIRE fact sheet.

Info Note that the SPIRE Spectrometer information in the fact sheet is outdate. Please use this up-to-date fact sheet for the Spectrometer.

 

SPIRE Handbook and SPIRE Data Reduction Guide

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Documents with relevance to the SPIRE calibration:

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SPIRE Spectrometer

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Historical papers

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Some values on the performance and calibration in these papers are outdated. Please consult the latest SPIRE Data Reduction Guide or the SPIRE Handbook for most up to date information.
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Some values on the performance and calibration in these papers are outdated. Please consult the latest SPIRE Data Reduction Guide or the SPIRE Handbook for most up to date information.
 
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Photometer data reduction

Overview

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The best source of information for reducing SPIRE Photometer data is the SPIRE Data Reduction Guide available as a standalone hyperlink document as well as 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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The best source of information for reducing SPIRE Photometer data is the SPIRE Data Reduction Guide available as a standalone hyperlink document as well as 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.
 

Data Processing Issues

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SPIRE Calibration Tree (& release note) Release Date Applicable HIPE Version Comment
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SPIRE_CAL_12_3 Sort May 2014 HIPE v12.1 Calibration tree currently used in operations
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SPIRE_CAL_13_1 Sort Apr 2015 HIPE v13.1 Calibration tree currently used in operations
SPIRE_CAL_12_3 May 2014 HIPE v12.1 Final v12 cal tree
 
SPIRE_CAL_12_2 March 2014 HIPE v12  
SPIRE_CAL_11_0 July 2013 HIPE v11 Final v11 cal tree
SPIRE_CAL_10_1 Jan 2013 HIPE v10 Final v10 cal tree
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  Details of individual calibration products can be found here.
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  • Any of the calibration trees can be retrieved in HIPE from the HSA using (e.g.) cal = spireCal(calTree="spire_cal_12_3") etc. The default (applicable to the HIPE version in use) can be obtained with cal = spireCal(calTree="spire_cal"). It can then be saved to a local pool right-clicking on the cal variable and then selecting from the context menu Send To -> Local Pool.
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  • Any of the calibration trees can be retrieved in HIPE from the HSA using (e.g.) cal = spireCal(calTree="spire_cal_13_1") etc. The default (applicable to the HIPE version in use) can be obtained with cal = spireCal(calTree="spire_cal"). It can then be saved to a local pool right-clicking on the cal variable and then selecting from the context menu Send To -> Local Pool.
 
  • Alternatively, the latest calibration tree for SPIRE can be obtained as a jar file from Latest calibration trees. Then, you have to possibilities to read and save:
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    1. The jar file can be load directly into HIPE with the command: cal = spireCal(jarFile="PATH_TO_FILE/spire_cal_12_3.jar"). To save it to a local pool, proceed as described above, right-clicking on the cal variable and then selecting from the context menu Send To -> Local Pool.
    2. The jar file can also be saved directly to a local pool without opening HIPE, running the following command in the terminal command line: cal_import PATH_TO_FILE/spire_cal_12_3.jar. Then, to load the calibration tree in HIPE, simply type: cal = spireCal(pool="spire_cal_12_3")
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    1. The jar file can be load directly into HIPE with the command: cal = spireCal(jarFile="PATH_TO_FILE/spire_cal_13_1.jar"). To save it to a local pool, proceed as described above, right-clicking on the cal variable and then selecting from the context menu Send To -> Local Pool.
    2. The jar file can also be saved directly to a local pool without opening HIPE, running the following command in the terminal command line: cal_import PATH_TO_FILE/spire_cal_13_1.jar. Then, to load the calibration tree in HIPE, simply type: cal = spireCal(pool="spire_cal_13_1")
  See the SPIRE Data Reduction Guide for more details.
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Spectrometer calibration and uncertainties

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    • Calibration uncertainties, which should be included in addition to the statistical errors of any measurement from HIPE v11 onwards, are as follows:
      • Point sources observed on the centre detectors (SSWD4 and SLWC3): the measured repeatability is 6%, with the following contributions: (i) absolute systematic uncertainty in the models from comparison of Uranus and Neptune - determined to be 3%; (i) the statistical repeatability determined from observations of Uranus and Neptune, with pointing corrected - estimated at 1% (excluding the edges of the bands); (iii) the uncertainties in the instrument and telescope model, which lead to an additive continuum offset error of 0.4 Jy for SLW and 0.3 Jy for SSW and (iv) the effect of the Herschel APE.
      • Sparse observations of significantly extended sources:
        • the absolute uncertainty in intensity for a reasonably bright, fully extended object, observed in the central detectors is, in theory, 1%, with the following contributions: (i) the systematic uncertainty in telescope model of 0.06%; (ii) the statistical repeatability estimated at 1% and (iii) an additive continuum offset of 3.4x10-20 W/m2/Hz/sr for SLW and 1.1x10-19 W/m2/Hz/sr for SSW.
        • In practice, truly extended sources tend to be faint and the uncertainty is therefore dominated by the additive offsets. When the source extent is larger than the main beam size, but not fully extended, or if there is structure inside the beam, then the uncertainties are dominated by the source-beam coupling (see Wu et al. 2013 ) and are significantly greater than 1%.
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      • Mapping mode: the variations between detectors becomes important and the overall repeatability has been measured as 7% (see Benielli et al. 2013, submitted, for a full discussion of mapping mode observations). The off-axis detectors are less well calibrated, especially outside the unvignetted part of the field.
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      • Mapping mode: the variations between detectors becomes important and the overall repeatability has been measured as 7% (see Benielli et al., 2014 for a full discussion of mapping mode observations). The off-axis detectors are less well calibrated, especially outside the unvignetted part of the field.
 
  • Uranus model used for the SPIRE FTS point-source flux calibration:
    • The ESA4 model, used from HIPE v10 onwards, is available here.
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 Contact the Helpdesk
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META FILEATTACHMENT attr="" autoattached="1" comment="SPIRE FTS fact sheet v10" date="1428659261" name="FTS-flyer-landscape_v11_A4.pdf" path="FTS-flyer-landscape_v11_A4.pdf" size="1710010" user="Main.IvanV" version="1"
 
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META FILEATTACHMENT attr="" autoattached="1" comment="SPIRE Spectrometer Launch Pad v1.7" date="1345816678" name="SPIRE_SpectrometerLaunchPad_v1.7.pdf" path="SPIRE_SpectrometerLaunchPad_v1.7.pdf" size="195133" user="Main.ChrisPearson" version="1"
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META FILEATTACHMENT attr="" autoattached="1" comment="" date="1304680043" name="Phot_Pipeline_Issue7.pdf" path="Phot_Pipeline_Issue7.pdf" size="464813" user="Main.LucaConversi" version="1"
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META FILEATTACHMENT attr="" autoattached="1" comment="" date="1330422558" name="SPIRE-BSS-DOC-002966_SPIRE_Spectrometer_pipeline_description_Issue_4_0_1.pdf" path="SPIRE-BSS-DOC-002966_SPIRE_Spectrometer_pipeline_description_Issue_4_0_1.pdf" size="812580" user="Main.EdwardPolehampton" version="1"
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META FILEATTACHMENT attr="" autoattached="1" comment="SPIRE FTS fact sheet v10" date="1428658242" name="FTS-flyer-landscape_v10_A4.pdf" path="FTS-flyer-landscape_v10_A4.pdf" size="1709830" user="Main.IvanV" version="1"
 
META FILEATTACHMENT attr="" autoattached="1" comment="SPIRE Photometer Launch Pad v1.7" date="1345816708" name="SPIRE_PhotometerLaunchPad_v1.7.pdf" path="SPIRE_PhotometerLaunchPad_v1.7.pdf" size="210362" user="Main.ChrisPearson" version="1"
META FILEATTACHMENT attr="" autoattached="1" comment="Script to correct photometer data in ODs 1304/1305" date="1374833050" name="correct_od1304_1305.py.txt" path="correct_od1304_1305.py.txt" size="610" user="Main.EdwardPolehampton" version="1"
META FILEATTACHMENT attr="" autoattached="1" comment="SPIRE A&A paper, Griifin et al 2010" date="1295862676" name="aa14519-10.pdf" path="aa14519-10.pdf" size="1353253" user="Main.AnthonyMarston" version="1"
 
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