# Verification Datasets Meeting 2016-03-30 Minutes

**URL:** <https://www.rubin.community/t/verification-datasets-meeting-2016-03-30-minutes/642>\
**Category:** Data Management\
**Tags:** verificationdataset\
**Created:** [March 30, 2016, 8:51pm UTC](https://www.rubin.community/t/verification-datasets-meeting-2016-03-30-minutes/642 "2016-03-30T20:51:09Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![nidever](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/nidever/32/29_2.png) [@nidever](https://www.rubin.community/u/nidever)\
**Post date:** [March 30, 2016, 8:51pm UTC](https://www.rubin.community/t/verification-datasets-meeting-2016-03-30-minutes/642/1 "2016-03-30T20:51:09Z")

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Verification Datasets Meeting:

Attendees: David, Hsin-Fang, Colin, Angelo  
Regrets: Simon, MWV, Frossie

**Colin:**

- tried out intra-chip cross-talk correction for DECam, handed off to Simon
- want to add a xtalk type and be able to put them into the calibration registry  
can use them for certain range of dates
- need more code to get all of this to work for DECam
- linearity correction, Russell working on this, using lookup table since it should be faster than  
using a polynomial (and don’t have to deal with different functional forms), will live in ip\_isr
- brief discussion of doing lightcurves with difference images

**Hsin-Fang:**

- ran multi-band driver on DECam test data
- jointCal working on DECam, John P. working on it, fixing some build issues

**Angelo:**

- working on tech document on SQUASH QA database schema, [http://sqr-008.lsst.io/en/latest/](http://sqr-008.lsst.io/en/latest/)
- looking at criteria for selecting data for image depth criteria

**David:**

- [https://confluence.lsstcorp.org/display/SQRE/COSMOS+DECam+data+reduction](https://confluence.lsstcorp.org/display/SQRE/COSMOS+DECam+data+reduction)
- made summary plots of the COSMOS rerun with SDSS as reference catalog
- lots of failures, still trying to figure out where the majority are coming from,  
need to change qa script to gather more information on failed files
- photometric scatter, between 0.01 and 0.05 mag depending on the band,  
okay, not great, maybe add color-terms for photometric zero point
- astrometric scatter terrible, 50-100 mas at the best
- CMD looks reasonable, but some issue probably from visits that had problems
- would like to try using the new version of processCcd
- also would like to use extendedness to separate stars/galaxies
- H-F: some failures due to few reference stars
- H-F: try new processCcd, spits out more information than old one
- Colin: sometimes many reference objects are thrown out during outlier rejection
- Angelo: extendedness only in coadds
- Jeff Calin working on HSC image, trying to get good CMD for dwarf galaxy with unresolved light

**Michael:** (gave update later in person)

- validation working on various datasets, cfht, hsc, decam
- baseline versions of output repos exist
- validate\_drp, configuration to set pass or fail criteria
- ci\_hsc been running every 8 hours on Jenkins

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**Author:** ![price](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/price/32/488_2.png) [@price](https://www.rubin.community/u/price)\
**Post date:** [March 30, 2016, 9:09pm UTC](https://www.rubin.community/t/verification-datasets-meeting-2016-03-30-minutes/642/2 "2016-03-30T21:09:31Z")

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SDSS has 2 or 3 bad fields in the Cosmos region. I’m not sure if these are fixed or removed in the Finkbeiner recalibration.