Difference: Minutes052118 ( vs. 1)

• ZTF updates - QZ

○ Good weather recently

○ Shutter issues: mechanics are good, but communications need work. Less than ~1 s errors.

• ZTF collaborator papers

○ 4 papers relevant to our group

▪ ML

▪ Ops

▪ Early science and science goals

▪ Data system

○ Should be submitted to publications board today.

• NEOs (QZ)

○ Tried to recover an NEO last week, was not successful.

○ Other was nearly a co-discovery with Catalina

• Alert stream

○ Transient detector rejecting all comets now?

▪ RB score threshold for ZMODE is 0.5.

▪ Alert stream has no RB threshold, but perhaps comets have too large FWHM (threshold is 7").

○ Frank and Lynne Jones uncovered an issue with the orbit database updating, causing systematic ephemeris offsets with time. That is now fixed.

• Streak detection

○ QZ working on new synthetic training

○ Frank checked "find streaks" completeness: 70%

▪ Getting that 30% is challenging, tuning some parameters can gain some, but lose others.

▪ … that might not be the exact percentage, Frank will look into it.

▪ two-pass filter? might be possible, how cpu heavy is find streaks?

-- QuanzhiYe - 21 May 2018