The MOA Project 2013 Observing Season

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Presentation transcript:

The MOA Project 2013 Observing Season David Bennett University of Notre Dame

MOA-II 1.8m telescope （New Zealand/Mt. John Observatory at NZ, 44S ） Mirror : 1.8m CCD : 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) G.C. Real time photometry and alerts 668 microlensing events (2013) https://it019909.massey.ac.nz/moa/

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 OGLE-2013-BLG-1066/MOA-2013-BLG-471 MOA-2013-BLG-126 OGLE-2013-BLG-1114/MOA-2013-BLG-485 MOA-2013-BLG-145/146 MOA-2013-BLG-498 MOA-2013-BLG-220 OGLE-2013-BLG-1177/MOA-2013-BLG-505 MOA-2013-BLG-246 MOA-2013-BLG-524 OGLE-2013-BLG-0341/MOA-2013-BLG-260 MOA-2013-BLG-557 MOA-2013-BLG-067 OGLE-2013-BLG-1259/MOA-2013-BLG-528 MOA-2013-BLG-299/OGLE-2013-BLG-0640 OGLE-2013-BLG-0911/MOA-2013-BLG-551 OGLE-2013-BLG-0674/MOA-2013-BLG-346 MOA-2013-BLG-611 OGLE-2013-BLG-0488/MOA-2013-BLG-355 MOA-2013-BLG-650 OGLE-2013-BLG-0446/MOA-2013-BLG-306 OGLE-2013-BLG-1868/MOA-2013-BLG-655 OGLE-2013-BLG-0860/MOA-2013-BLG-411 OGLE-2013-BLG-0798/MOA-2013-BLG-432 Likely planetary events in red (not all events checked) MOA-2013-BLG-456 MOA-2013-BLG-460 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