Alert Production End to End Flow

• DMCS connects to DM Event Services Broker and OCS
• Starts jobs on replicators, distributors and workers.

• Receives processing jobs from DMCS (one for each CCD and wavefront sensor)
• Receives archiving jobs from DMCS (one for each raft and one for WFS images)
• Jobs are distributed to worker machines
  • Retrieve template image (by filter and airmass)
  • Retrieve Objects from last Data Release
  • Retrieve master calibration images

• Snap processing (per amplifier)
  • Instrumental signature removal
• Combine snaps into a visit
  • cosmic ray rejection / no warping / assumes perfect alignment
• Background estimation
• Determine PSF
• Extract sources
• WCS calibration
• Photometric zero-point

• Select appropriate template image (filter/airmass specific)
• Difference template and visit
• Detect sources

• Associate DIASources with DIAObjects or SSObjects
• Associate DIAObjects with Objects

• Retrieve history of detected DIASources
• Generate alert packets
• Publish to brokers

• Calculate additional science quality metrics
• Summarize metrics (PSF, WCS,…)
• Publish metrics to OCS

• NightMOPS predicts the SSObjects that should be seen in a given visit.
  • Coarse ephemerides calculated during day
  • Precise ephemerides calculated at nextVisit trigger
• DayMOPS takes unassociated DIAObjects and determines whether they are consistent with a solar system object.

also see Level 1 Difference Imaging and Moving Object Processing

• Alert database
• Tracklet database
• Moving Object Database

• Display full history of alert
  • include all postage stamps and light curve
  • Object association
  • Possible cross-matching with other catalogs
• Annotate an alert
• View previous annotations