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HELP LOGO HELP official SPIRE maps (dmu19)

This is a data product of the Herschel Extragalactic Legacy Project (HELP)

This product contains the homogenised SPIRE maps of the Herschel Extragalactic Legacy Project.

The full files which are not stored in the Git repository can be downloaded from HeDaM:

File structure

The FITS files have all the same structure with the Header Data Units (HDU) listed below.

  1. Primary HDU.
  2. IMAGE: The signal map in Jy/beam.
  3. NEBFILT: The signal map filtered for nebular emission by the nebular software from Casutools (see dmu19_nebular_filtered_maps).
  4. ERROR: The error map in Jy/beam.
  5. EXPOSURE: The exposure map in seconds.
  6. MASK: The mask map with the following values:
    • 0: no mask (i.e. good data);
    • 1: regions with low depth relative to the rest of the map.
  7. MFILT Matched Filtered map Jy/beam (Chapin et al. 2011)
  8. MFILT_ERROR The error map for the Matched Filtered map Jy/beam
  9. Matchedfilter The Matched Filter used for the filtering

The maps were put in this structure using gen_maps_SD.py

Fixme

The hers-helms-xmm_itermap_20160623_PSW.fits is corrupted and we can only access the first HDU with the image map. I checked with Marco and the file is also corrupted on Caltech servers. Someone should recreate the maps with only the Herschel-Stripe-82 ObsIDs (i.e. without XMM-LSS, to get smaller files).

Notes

  • Some original maps does not contain exposure information but coverage maps expressed in number of hits. These coverage maps where converted to exposure multiplying the hit value by 1/10 s for parallel mode and 1/18.6 s for standard observations.
  • The mask definition is not exactly the same between surveys. For H-ATLAS, it only which pixels were observed or not. AKARI-NEP does not provide masks. For fields without a mask we create a mask, using EXPOSURE = 0 -> MASK = 1
  • The Matchedfilter header contains the information about the confusion noise, instumental noise and pixel size in arcsec used for the filter.

Lists of Herschel Observation identifiers (ObsIDs)

The Herschel observation identifiers (ObsIDs) used in each map are provided in the headers of the primary HDU. We also provide to list of ObsIDs relevant for HELP.

HELP_ObsIDs_SPIRE.xls

This files contains the list of the ObsIDs associated to HELP. It is based on the list produced by Seb, with a addition of the ObsIDs for AKARI-NEP and SPIRE-NEP given by Chris.

  • Some observation have a “failed” QC_status (in red in the spreadsheet) and are not available.
  • The observation for COSMOS_CANDELS and CANDELS_UDS-1 (in orange) are in the primary list of ObsIDs but are not used in HELP data products.
  • We have to check with H-ATLAS to be sure they used all the ObsIDs in this list.
  • There is a column “In_HELP” set to true for the ObsIDs actually used for HELP maps.
  • When producing the big Herschel-Stripe-82 + XMM-LSS map, some observations were forgotten, the column “Missing_from_HS82_XMM” is true for them.

All_SPIRE_ObsIDs_on_HELP_coverage.fits

This is the list of all the SPIRE ObsIDs queried from the Herschel Science Archive (at the begining of October 2017) and limited to HELP coverage.

Authors: Steven Duivenvoorden, Yannick Rohelly

HELP LOGO

For a full description of the database and how it is organised in to dmu_products please see the top level readme.

The Herschel Extragalactic Legacy Project, (HELP), is a European Commission Research Executive Agency funded project under the SP1-Cooperation, Collaborative project, Small or medium-scale focused research project, FP7-SPACE-2013-1 scheme, Grant Agreement Number 607254.

Acknowledgements