GSC-II Plate Processing Pipeline Status C. Loomis, C. Sturch, F. Guglielmetti

Pipeline Status Update GSC2 export activities. POSSI IIIaE processing. Database recalibration-load-match. Future processing activities.

Pipeline Export Activities GSCII2.1.1 release nd epoch Schmidt plates 1.1 x 10 9 detections Comprehensive list and detailed information

Pipeline Export Activities -Recalibration pipeline tasks Catalog staging Photometric & astrometric calibrations ftp transfer of recalibrated headers to NT Apply Calibrations run on NT EXPORT

Recalibration (Cont…) Photosol

POSSI Pipeline Processing 99 % of POSSI red fields completed. Processing extends down to –30 degree zone. (Includes new 15  scans for plates south of –18 degrees that were not scanned for DSS1). Pipeline changes for POSSI survey. 1.Tasks requiring area inputs scaled to match the lower resolution of POSSI scans. 2.Detection threshold above sky raised from 3  to 4  to eliminate false detections from higher grain noise. 3.Cubic model for plate solution (telescope configuration).

Recalibration and database loading Short term goal: 2 colors all sky (roughly 3510 fields, excluding equatorial overlap fields) Surveys: POSSII IIIaF, POSSII IIIaJ, SES IIIaF, SES equatorial extension IIIaF, SES galactic plane IIIaF (4 min exposure), SERC IIIaJ, SERC galactic plane IIaD (5 min exposure) Photometric and astrometric recalibration for remaining fields. Combined database loading and matching to run sequentially upon release to database. Coupled with image and processing file loading into HSM (OOP, CIM, FPA, SKY, MCO…)

Recalibration and Database Loading (Cont…) Since mid-August recalibrated loaded and matched 663 plates. Total plates in COMPASS to Database plates by survey

Recalibration and database loading Improve efficiency by running concurrent processing and automation of data handling processes. Weak link is need for human intervention and decision about calibrations. Restore and process on VMS (30 to 60 min per plate) QA and Accept ? ftp,HSM ingest, database load, plate matching. 60 min per plate (depends on detections and number of overlap regions). Vms backup Oopindex Findcat, act,ty2,ppm,toc, gp2, Refraction, Photosol, plate_solution, Apply_calibrations Daemon process written in Perl and running c++ and fortran Under WINNT

Future activities -Processing: 1.Additional surveys such as POSSII IV-N, SES IV- N,POSSI IIIaO, Palomar quickV IIaD 2.Ingest of image and processing data into HSM for future reprocessing. 3. Global database recalibrations, iterating over the whole sky.