Science Tools Working Group

Did not meet this week. We won't meet until after the collaboration meeting.

The current version of ScienceTools remains v7r6p1.

Data products: No news

Databases and related utilities

No news

Likelihood analysis

From Jim:

  • Fixed a bug in pyLikelihood wherein the model was not updated when a source was deleted. (pyLikelihood v0r5p1)
  • Fixed a couple bugs in the error circle estimation in gtfindsrc. (Likelihood v11r13p3)
  • Modified gtfindsrc so that it uses an absolute convergence tolerance for the fitted position. (Likelihood v11r14)
  • Modified the internal handling of FITS file names so that environment variables are preserved when writing out model xml files, e.g., 
      <spatialModel file="$(EXTFILESSYS)/galdiffuse/GP_gamma.fits" type="MapCubeFunction">
    (Likelihood v11r14)
  • Modified gtmaketime to use the CFITSIO extended filename syntax when reading in the FT2 data to select only those intervals relevant for the given FT1 file. The execution time for event files at the end of a long FT2 file is now about the same as for a comparable one at the beginning. (dataSubselector v4r6p4)

The following, also from Jim, regards IRFs. I'm not sure where it belongs in this report, but it is important:

  • Added Pass 4 IRF files to CALDB. This is now where all ST applications will access these data. (irfs/caldb v0r2, irfs/handoff_response v3r4p1)
  • Fixed a bug in dc2Response where the class 3 & 4 IRFs were not being loaded. This bug was introduced in dc2Response v3 Jan 29, 2007; had anybody tried to use these v3 irfs, an exception would have been thrown. (irfs/dc2Response v3r0p1)

GRB tools

James reports that he and Dave Davis have tagged v1r2p4 of rspgen to fix the normalization problem that Jim reported to them last week. They are still tracking down some integrals over energy dispersion functions that for some true energies and inclination angles are evaluated as 0. Probably related to this work, the current LATEST build of rspgen is not passing its unit test

Pulsar tools

Masa and James are continuing to work on gtpspec. Masa reports that they are debugging it.

Observation simulation

Max has tagged even newer versions of PulsarSpectrum (now v2r2p11). The problem with running the SC1 pulsars on recent versions of PulsarSpectrum has not gone away but remains latent if the pointing history file starts earlier than the simulation - how much is required is TBD.

User interface and infrastructure (& utilities)

From Toby: I've written an application that creates layered FITS images of the layers in exposure cubes.

It is built with the Science tools now and has a brief user guide .

This tool relates to the question of the format of the livetime 'cubes' written by gtlivetimecube.

Source Catalog

Met this week. Jean presented some results on tracking some more 'spurious' sources - extended (SNR) sources in the SC1 sky model. He also made the case for dividing the highest energy range for the fluxes into two: 3-10 GeV and >10 GeV. This will get discussed more at the collaboration meeting at the end of the month. Dario Gasparrini presented a Minimal Spanning Tree method for finding point sources; the algorithm was presented by Campana et al. as a poster at the Symposium.

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