the moa project 2013 observing season david bennett university of notre dame
TRANSCRIPT
The MOA Project 2013 Observing Season
David BennettUniversity of Notre Dame
MOA-II 1.8m telescope( New Zealand/Mt. John Observatory at NZ, 44S )
Mirror : 1.8mCCD : 8k x 10k pix.
FOV : 2.2 deg.2
- Allows high cadence monitoring
MOA Observing Strategy
• 50 deg.2(20Mstars)• 2.2 deg.2 per field
1obs./night.(>MJup)
• 1obs./95min.(Mjup)
1obs./47min. (Mnep)
1obs./15min. (M)668 microlensing events (2013)
https://it019909.massey.ac.nz/moa/
G.C.
Real time photometry and alerts
MOA-2009-BLG-266
parallax uncertainty is asymmetric
Summary of Planetary Results
• 10 events with planetary signals in MOA data– MOA-2013-BLG-040/OGLE-2013-BLG-0077*– MOA-2013-BLG-093*– MOA-2013-BLG-220– MOA-2013-BLG-605/OGLE-2013-BLG-1835– OGLE-2013-BLG-0132/MOA-2013-BLG-148*– OGLE-2013-BLG-0341/MOA-2013-BLG-26– OGLE-2013-BLG-1125/MOA-2013-BLG-584– OGLE-2013-BLG-1271/MOA-2013-BLG-579*– OGLE-2013-BLG-1721/MOA-2013-BLG-618 – OGLE-2013-BLG-1761/MOA-2013-BLG-651
• Many anomalies not detected in real time (*)– Plan to fix this in 2014
MOA-2013-BLG-040/OGLE-0077
MOA+OGLE survey discovery - Not alerted in real time
q = 3×10-4 t* poorly constrained
MOA-2013-BLG-093
MOA+OGLE survey discovery - No real-time alert q = 3×10-3
MOA-2013-BLG-220
High mag event, alerted by MOA, covered by uFUN, Robonet, MOA and OGLE q = 3×10-3
MOA-2013-BLG-605/OGLE-1835
Planetary anomaly alerted as single lens event in real time – understood as planetary event when it began brightening again.
q = 3×10-4 s = 2.3 likely parallax signal
OGLE-2013-BLG-0132/MOA-148
1st planetary peak missed by MOA real-time analysis. Identified by Han with OGLE data from the next night, but not follow-up data obtained
q = 5×10-4 s = 1.14 likely parallax signal
OGLE-2013-BLG-0341/MOA-260
Identified by Gould & Han as likely planetary event before high-mag – binary star system with planet.
Gould et al. paper in preparation
planet has low mass 2-3 Earth-masses.
OGLE-2013-BLG-1125/MOA-584
Alerted in real time by MOA, but toward the end of the planetary anomaly. But, peak observed by Robonet, μFUN.
q = 2×10-3 s = 1.05 strong parallax
OGLE-2013-BLG-1271/MOA-579
MOA+OGLE survey discovery.
Not identified in real time
Strong cusp crossing in MOA data
q = 4×10-3 s = 1.45
OGLE-2013-BLG-1721/MOA-618
Planetary signal in OGLE data identified by Han
“Manual alert” used to produce MOA light curve
q = 1.3 ×10-3 s = 0.96
OGLE-2013-BLG-1761/MOA-651
Anomaly identified in real time by MOA, but no follow-up data.
(Late in season – Sep. 10)
q = 3×10-3 s = 0.88 or
q = 6×10-3 s = 0.96
High Magnification Alerts
• 26 high mag alerts based in part on MOA data– MOA-2013-BLG-063 – MOA-2013-BLG-126– MOA-2013-BLG-145/146– MOA-2013-BLG-220– MOA-2013-BLG-246– OGLE-2013-BLG-0341/MOA-2013-BLG-260– MOA-2013-BLG-067– MOA-2013-BLG-299/OGLE-2013-BLG-0640 – OGLE-2013-BLG-0674/MOA-2013-BLG-346– OGLE-2013-BLG-0488/MOA-2013-BLG-355– OGLE-2013-BLG-0446/MOA-2013-BLG-306– OGLE-2013-BLG-0860/MOA-2013-BLG-411– OGLE-2013-BLG-0798/MOA-2013-BLG-432– MOA-2013-BLG-456
– MOA-2013-BLG-460– OGLE-2013-BLG-1066/MOA-2013-BLG-471– OGLE-2013-BLG-1114/MOA-2013-BLG-485– MOA-2013-BLG-498– OGLE-2013-BLG-1177/MOA-2013-BLG-505– MOA-2013-BLG-524– MOA-2013-BLG-557– OGLE-2013-BLG-1259/MOA-2013-BLG-528– OGLE-2013-BLG-0911/MOA-2013-BLG-551– MOA-2013-BLG-611– MOA-2013-BLG-650– OGLE-2013-BLG-1868/MOA-2013-BLG-655
Likely planetary events in red (not all events checked)
MOA real-time photometry means that most high mag alerts have most recent data from MOA
7 other high mag alerts with OGLE data only(according to my possibly incomplete email review)
High Mag Alerts
MOA-2013-BLG-063 MOA-2013-BLG-220 planet!
High Mag Alerts
OGLE-2013-BLG-0341 (planet) MOA-2013-BLG-299/OGLE-0640
High Mag Alerts
OGLE-2013-BLG-0674/MOA-346 OGLE-2013-BLG-0446/MOA-306 planet
High Mag Alerts
OGLE-2013-BLG-0860/MOA-411
High Mag Alerts
OGLE-2013-BLG-0798/MOA-432 MOA-2013-BLG-460
High Mag Alerts
OGLE-2013-BLG-1066/MOA-471 OGLE-2013-BLG-1114/MOA-485
High Mag Alerts
MOA-2013-BLG-498 MOA-2013-BLG-557
High Mag Alerts
OGLE-2013-BLG-1259/MOA-528 OGLE-2013-BLG-0911/MOA-511
possible planet
High Mag Alerts
MOA-2013-BLG-611 OGLE-2013-BLG-1868/MOA-655
Improvements Planned for 2014
• Problems:– missed planetary anomaly alerts– likely missed short, “rogue planet” events
• Develop remote anomaly alert capability• Reduce false alarms in real-time event alert system
– many false alarms are due to image artifacts that can be removed
• Closer cooperation with LCOGT? – particularly SAAO site which can immediately follow possible anomalies seen by MOA
• Arrange for planetary signals and good weather in the middle of the season when it is easier to collect data