Not listed MICROLENSING SURVEYS HAVE DETECTED HUNDREDS OF EVENTS IN THE DIRECTION OF THE GALACTIC BULGE PROVIDING VALUABLE INFORMATION ON THE POPULATION OF FAINT STARS OTHERWISE UNDETECTABLE IN OUR GALAXY. WITHIN THIS SAMPLE OF EVENTS APPROXIMATELY 20 PLANETS HAVE BEEN UNCOVERED WITH ABOUT HALF OF THEM BEING EITHER UNBOUND OR AT LARGE SEPARATION (GREATER THAN 100 AU) FROM THEIR HOST STAR. THE MAJORITY OF THE CURRENT MICROLENSING PLANETARY DETECTIONS HAVE COME FROM RARE HIGH-MAGNIFICATION EVENTS WHICH ARE ALERTED ANDIMMEDIATELY FOLLOWED ON WITH HIGH CADENCE GROUND-BASED OBSERVATIONS FROM A NETWORK OF COLLABORATIONS AROUND THE WORLD. THESE RESULTS HAVE ESTABLISHED THAT MICROLENSING IS AN EFFECTIVE TECHNIQUE THAT CAN BE USED DISTINGUISH PLANETS FROM THEIR HOST STAR IN PARTICULAR PLANETS AT LARGE SEPARATION A REGIME IN WHICH THE RADIAL VELOCITY AND TRANSITING METHODS FOR PLANET DETECTION LOSE SENSITIVITY.THE NEXT STEP IN STUDIES OF GALACTIC MICROLENSING INVOLVE DEVELOPMENT OF SPACE-BASED SURVEYS WHICH PROVIDE BETTER ANGULAR RESOLUTION AND THE ABILITY RESOLVE MORE FAINT STARS. IN ANTICIPATION OF PROPOSED SPACED-BASED MICROLENSING SURVEYS SUCH AS THE WFIRST SATELLITE THIS RESEARCH WILL DEVELOP THEORETICAL TOOLS TO UNDERSTAND AND INTERPRET FUTURE LARGE SAMPLES OF GALACTIC MICROLENSING OBSERVATIONS. WE WILL STUDY HOW TO OPTIMIZE A SPACE-BASED MICROLENSING SURVEY TO OBTAIN THE MAXIMAL SCIENTIFIC OUTPUT FOR THE COSTS AVAILABLE. AS PART OF THIS THEORETICAL RESEARCH WE PLAN TO DEVELOP A FAST AND EFFICIENT NUMERICAL CODE THAT CAN BE DISTRIBUTED TO THE LARGER COMMUNITY INCORPORATING MODERN ASPECTS OF GALACTIC ASTROPHYSICS INTO MICROLENSING THEORY. THE SIMULATIONS WILL INCLUDE EFFECTS THAT WILL BECOME IMPORTANT FOR SPACE-BASED SURVEYS SUCH AS THE FINITE SIZE OF MAIN SEQUENCE SOURCE STARS AND UNDERSTANDING THE MICROLENSING SIGNALS FROM MULTIPLE PLANETS. A MAJOR OUTPUT OF OUR ANALYSIS WILL BE A QUANTIFICATION OF THE PLANETARY DETECTION EFFICIENCY OVER THE ENTIRE RANGE OF PLANET MASSES AND SEMI-MAJOR AXES. FURTHER WE WILL UNDERSTAND PLANETARY DETECTION PROSPECTS USING BOTH LOW AND HIGH MAGNIFICATION EVENTS AND DETERMINE IN WHICH OF THESE REGIMES ARE MOST SUITABLE FOR EFFICIENT PLANETARY DETECTION. OUR RESEARCH WILL LAY THEGROUNDWORK FOR BETTER UNDERSTANDING THE STATISTICAL DISTRIBUTION OF PLANETS IN THE MILKY WAY GALAXY AND GUIDE LONGER-TERM PROJECTS THAT SEARCH FOR EARTH-MASS PLANETS MORE LOCALLY IN THE SOLAR NEIGHBORHOOD. ($6) 12/20/18 2 MICROLENSING SURVEYS HAVE DETECTED HUNDREDS OF EVENTS IN THE DIRECTION OF THE GALACTIC BULGE, PROVIDING VALUABLE INFORMATION ON THE POPULATION OF FAINT STARS OTHERWISE UNDETECTABLE IN OUR GALAXY. WITHIN THIS SAMPLE OF EVENTS APPROXIMATELY 20 PLANETS HAVE BEEN UNCOVERED, WITH ABOUT HALF OF THEM BEING EITHER UNBOUND OR AT LARGE SEPARATION (GREATER THAN 100 AU) FROM THEIR HOST STAR. THE MAJORITY OF THE CURRENT MICROLENSING PLANETARY DETECTIONS HAVE COME FROM RARE, HIGH-MAGNIFICATION EVENTS WHICH ARE ALERTED AND IMMEDIATELY FOLLOWED ON WITH HIGH CADENCE GROUND-BASED OBSERVATIONS FROM A NETWORK OF COLLABORATIONS AROUND THE WORLD. THESE RESULTS HAVE ESTABLISHED THAT MICROLENSING IS AN EFFECTIVE TECHNIQUE THAT CAN BE USED DISTINGUISH PLANETS FROM THEIR HOST STAR, IN PARTICULAR PLANETS AT LARGE SEPARATION, A REGIME IN WHICH THE RADIAL VELOCITY AND TRANSITING METHODS FOR PLANET DETECTION LOSE SENSITIVITY. THE NEXT STEP IN STUDIES OF GALACTIC MICROLENSING INVOLVE DEVELOPMENT OF SPACE-BASED SURVEYS, WHICH PROVIDE BETTER ANGULAR RESOLUTION AND THE ABILITY RESOLVE MORE FAINT STARS. IN ANTICIPATION OF PROPOSED SPACED-BASED MICROLENSING SURVEYS SUCH AS THE WFIRST SATELLITE, THIS RESEARCH WILL DEVELOP THEORETICAL TOOLS TO UNDERSTAND AND INTERPRET FUTURE LARGE SAMPLES OF GALACTIC MICROLENSING OBSERVATIONS. WE WILL STUDY HOW TO OPTIMIZE A SPACE-BASED MICROLENSING SURVEY TO OBTAIN THE MAXIMAL SCIENTIFIC OUTPUT FOR THE COSTS AVAILABLE. AS PART OF THIS THEORETICAL RESEARCH WE PLAN TO DEVELOP A FAST AND EFFICIENT NUMERICAL CODE THAT CAN BE DISTRIBUTED TO THE LARGER COMMUNITY, INCORPORATING MODERN ASPECTS OF GALACTIC ASTROPHYSICS INTO MICROLENSING THEORY. THE SIMULATIONS WILL INCLUDE EFFECTS THAT WILL BECOME IMPORTANT FOR SPACE-BASED SURVEYS, SUCH AS THE FINITE SIZE OF MAIN SEQUENCE SOURCE STARS AND UNDERSTANDING THE MICROLENSING SIGNALS FROM MULTIPLE PLANETS. A MAJOR OUTPUT OF OUR ANALYSIS WILL BE A QUANTIFICATION OF THE PLANETARY DETECTION EFFICIENCY OVER THE ENTIRE RANGE OF PLANET MASSES AND SEMI-MAJOR AXES. FURTHER WE WILL UNDERSTAND PLANETARY DETECTION PROSPECTS USING BOTH LOW AND HIGH MAGNIFICATION EVENTS, AND DETERMINE IN WHICH OF THESE REGIMES ARE MOST SUITABLE FOR EFFICIENT PLANETARY DETECTION. OUR RESEARCH WILL LAY THE GROUNDWORK FOR BETTER UNDERSTANDING THE STATISTICAL DISTRIBUTION OF PLANETS IN THE MILKY WAY GALAXY, AND GUIDE LONGER-TERM PROJECTS THAT SEARCH FOR EARTH-MASS PLANETS MORE LOCALLY IN THE SOLAR NEIGHBORHOOD. Funding Only Action ($6) 12/20/18 Not listed MICROLENSING SURVEYS HAVE DETECTED HUNDREDS OF EVENTS IN THE DIRECTION OF THE GALACTIC BULGE PROVIDING VALUABLE INFORMATION ON THE POPULATION OF FAINT STARS OTHERWISE UNDETECTABLE IN OUR GALAXY. WITHIN THIS SAMPLE OF EVENTS APPROXIMATELY 20 PLANETS HAVE BEEN UNCOVERED WITH ABOUT HALF OF THEM BEING EITHER UNBOUND OR AT LARGE SEPARATION (GREATER THAN 100 AU) FROM THEIR HOST STAR. THE MAJORITY OF THE CURRENT MICROLENSING PLANETARY DETECTIONS HAVE COME FROM RARE HIGH-MAGNIFICATION EVENTS WHICH ARE ALERTED ANDIMMEDIATELY FOLLOWED ON WITH HIGH CADENCE GROUND-BASED OBSERVATIONS FROM A NETWORK OF COLLABORATIONS AROUND THE WORLD. THESE RESULTS HAVE ESTABLISHED THAT MICROLENSING IS AN EFFECTIVE TECHNIQUE THAT CAN BE USED DISTINGUISH PLANETS FROM THEIR HOST STAR IN PARTICULAR PLANETS AT LARGE SEPARATION A REGIME IN WHICH THE RADIAL VELOCITY AND TRANSITING METHODS FOR PLANET DETECTION LOSE SENSITIVITY.THE NEXT STEP IN STUDIES OF GALACTIC MICROLENSING INVOLVE DEVELOPMENT OF SPACE-BASED SURVEYS WHICH PROVIDE BETTER ANGULAR RESOLUTION AND THE ABILITY RESOLVE MORE FAINT STARS. IN ANTICIPATION OF PROPOSED SPACED-BASED MICROLENSING SURVEYS SUCH AS THE WFIRST SATELLITE THIS RESEARCH WILL DEVELOP THEORETICAL TOOLS TO UNDERSTAND AND INTERPRET FUTURE LARGE SAMPLES OF GALACTIC MICROLENSING OBSERVATIONS. WE WILL STUDY HOW TO OPTIMIZE A SPACE-BASED MICROLENSING SURVEY TO OBTAIN THE MAXIMAL SCIENTIFIC OUTPUT FOR THE COSTS AVAILABLE. AS PART OF THIS THEORETICAL RESEARCH WE PLAN TO DEVELOP A FAST AND EFFICIENT NUMERICAL CODE THAT CAN BE DISTRIBUTED TO THE LARGER COMMUNITY INCORPORATING MODERN ASPECTS OF GALACTIC ASTROPHYSICS INTO MICROLENSING THEORY. THE SIMULATIONS WILL INCLUDE EFFECTS THAT WILL BECOME IMPORTANT FOR SPACE-BASED SURVEYS SUCH AS THE FINITE SIZE OF MAIN SEQUENCE SOURCE STARS AND UNDERSTANDING THE MICROLENSING SIGNALS FROM MULTIPLE PLANETS. A MAJOR OUTPUT OF OUR ANALYSIS WILL BE A QUANTIFICATION OF THE PLANETARY DETECTION EFFICIENCY OVER THE ENTIRE RANGE OF PLANET MASSES AND SEMI-MAJOR AXES. FURTHER WE WILL UNDERSTAND PLANETARY DETECTION PROSPECTS USING BOTH LOW AND HIGH MAGNIFICATION EVENTS AND DETERMINE IN WHICH OF THESE REGIMES ARE MOST SUITABLE FOR EFFICIENT PLANETARY DETECTION. OUR RESEARCH WILL LAY THEGROUNDWORK FOR BETTER UNDERSTANDING THE STATISTICAL DISTRIBUTION OF PLANETS IN THE MILKY WAY GALAXY AND GUIDE LONGER-TERM PROJECTS THAT SEARCH FOR EARTH-MASS PLANETS MORE LOCALLY IN THE SOLAR NEIGHBORHOOD. $0 7/19/17 1 MICROLENSING SURVEYS HAVE DETECTED HUNDREDS OF EVENTS IN THE DIRECTION OF THE GALACTIC BULGE, PROVIDING VALUABLE INFORMATION ON THE POPULATION OF FAINT STARS OTHERWISE UNDETECTABLE IN OUR GALAXY. WITHIN THIS SAMPLE OF EVENTS APPROXIMATELY 20 PLANETS HAVE BEEN UNCOVERED, WITH ABOUT HALF OF THEM BEING EITHER UNBOUND OR AT LARGE SEPARATION (GREATER THAN 100 AU) FROM THEIR HOST STAR. THE MAJORITY OF THE CURRENT MICROLENSING PLANETARY DETECTIONS HAVE COME FROM RARE, HIGH-MAGNIFICATION EVENTS WHICH ARE ALERTED AND IMMEDIATELY FOLLOWED ON WITH HIGH CADENCE GROUND-BASED OBSERVATIONS FROM A NETWORK OF COLLABORATIONS AROUND THE WORLD. THESE RESULTS HAVE ESTABLISHED THAT MICROLENSING IS AN EFFECTIVE TECHNIQUE THAT CAN BE USED DISTINGUISH PLANETS FROM THEIR HOST STAR, IN PARTICULAR PLANETS AT LARGE SEPARATION, A REGIME IN WHICH THE RADIAL VELOCITY AND TRANSITING METHODS FOR PLANET DETECTION LOSE SENSITIVITY. THE NEXT STEP IN STUDIES OF GALACTIC MICROLENSING INVOLVE DEVELOPMENT OF SPACE-BASED SURVEYS, WHICH PROVIDE BETTER ANGULAR RESOLUTION AND THE ABILITY RESOLVE MORE FAINT STARS. IN ANTICIPATION OF PROPOSED SPACED-BASED MICROLENSING SURVEYS SUCH AS THE WFIRST SATELLITE, THIS RESEARCH WILL DEVELOP THEORETICAL TOOLS TO UNDERSTAND AND INTERPRET FUTURE LARGE SAMPLES OF GALACTIC MICROLENSING OBSERVATIONS. WE WILL STUDY HOW TO OPTIMIZE A SPACE-BASED MICROLENSING SURVEY TO OBTAIN THE MAXIMAL SCIENTIFIC OUTPUT FOR THE COSTS AVAILABLE. AS PART OF THIS THEORETICAL RESEARCH WE PLAN TO DEVELOP A FAST AND EFFICIENT NUMERICAL CODE THAT CAN BE DISTRIBUTED TO THE LARGER COMMUNITY, INCORPORATING MODERN ASPECTS OF GALACTIC ASTROPHYSICS INTO MICROLENSING THEORY. THE SIMULATIONS WILL INCLUDE EFFECTS THAT WILL BECOME IMPORTANT FOR SPACE-BASED SURVEYS, SUCH AS THE FINITE SIZE OF MAIN SEQUENCE SOURCE STARS AND UNDERSTANDING THE MICROLENSING SIGNALS FROM MULTIPLE PLANETS. A MAJOR OUTPUT OF OUR ANALYSIS WILL BE A QUANTIFICATION OF THE PLANETARY DETECTION EFFICIENCY OVER THE ENTIRE RANGE OF PLANET MASSES AND SEMI-MAJOR AXES. FURTHER WE WILL UNDERSTAND PLANETARY DETECTION PROSPECTS USING BOTH LOW AND HIGH MAGNIFICATION EVENTS, AND DETERMINE IN WHICH OF THESE REGIMES ARE MOST SUITABLE FOR EFFICIENT PLANETARY DETECTION. OUR RESEARCH WILL LAY THE GROUNDWORK FOR BETTER UNDERSTANDING THE STATISTICAL DISTRIBUTION OF PLANETS IN THE MILKY WAY GALAXY, AND GUIDE LONGER-TERM PROJECTS THAT SEARCH FOR EARTH-MASS PLANETS MORE LOCALLY IN THE SOLAR NEIGHBORHOOD. Other Administrative Action $0 7/19/17 Not listed MICROLENSING SURVEYS HAVE DETECTED HUNDREDS OF EVENTS IN THE DIRECTION OF THE GALACTIC BULGE, PROVIDING VALUABLE INFORMATION ON THE POPULATION OF FAINT STARS OTHERWISE UNDETECTABLE IN OUR GALAXY. WITHIN THIS SAMPLE OF EVENTS APPROXIMATELY 20 PLANETS HAVE BEEN UNCOVERED, WITH ABOUT HALF OF THEM BEING EITHER UNBOUND OR AT LARGE SEPARATION (GREATER THAN 100 AU) FROM THEIR HOST STAR. THE MAJORITY OF THE CURRENT MICROLENSING PLANETARY DETECTIONS HAVE COME FROM RARE, HIGH-MAGNIFICATION EVENTS WHICH ARE ALERTED AND IMMEDIATELY FOLLOWED ON WITH HIGH CADENCE GROUND-BASED OBSERVATIONS FROM A NETWORK OF COLLABORATIONS AROUND THE WORLD. THESE RESULTS HAVE ESTABLISHED THAT MICROLENSING IS AN EFFECTIVE TECHNIQUE THAT CAN BE USED DISTINGUISH PLANETS FROM THEIR HOST STAR, IN PARTICULAR PLANETS AT LARGE SEPARATION, A REGIME IN WHICH THE RADIAL VELOCITY AND TRANSITING METHODS FOR PLANET DETECTION LOSE SENSITIVITY. THE NEXT STEP IN STUDIES OF GALACTIC MICROLENSING INVOLVE DEVELOPMENT OF SPACE-BASED SURVEYS, WHICH PROVIDE BETTER ANGULAR RESOLUTION AND THE ABILITY RESOLVE MORE FAINT STARS. IN ANTICIPATION OF PROPOSED SPACED-BASED MICROLENSING SURVEYS SUCH AS THE WFIRST SATELLITE, THIS RESEARCH WILL DEVELOP THEORETICAL TOOLS TO UNDERSTAND AND INTERPRET FUTURE LARGE SAMPLES OF GALACTIC MICROLENSING OBSERVATIONS. WE WILL STUDY HOW TO OPTIMIZE A SPACE-BASED MICROLENSING SURVEY TO OBTAIN THE MAXIMAL SCIENTIFIC OUTPUT FOR THE COSTS AVAILABLE. AS PART OF THIS THEORETICAL RESEARCH WE PLAN TO DEVELOP A FAST AND EFFICIENT NUMERICAL CODE THAT CAN BE DISTRIBUTED TO THE LARGER COMMUNITY, INCORPORATING MODERN ASPECTS OF GALACTIC ASTROPHYSICS INTO MICROLENSING THEORY. THE SIMULATIONS WILL INCLUDE EFFECTS THAT WILL BECOME IMPORTANT FOR SPACE-BASED SURVEYS, SUCH AS THE FINITE SIZE OF MAIN SEQUENCE SOURCE STARS AND UNDERSTANDING THE MICROLENSING SIGNALS FROM MULTIPLE PLANETS. A MAJOR OUTPUT OF OUR ANALYSIS WILL BE A QUANTIFICATION OF THE PLANETARY DETECTION EFFICIENCY OVER THE ENTIRE RANGE OF PLANET MASSES AND SEMI-MAJOR AXES. FURTHER WE WILL UNDERSTAND PLANETARY DETECTION PROSPECTS USING BOTH LOW AND HIGH MAGNIFICATION EVENTS, AND DETERMINE IN WHICH OF THESE REGIMES ARE MOST SUITABLE FOR EFFICIENT PLANETARY DETECTION. OUR RESEARCH WILL LAY THE GROUNDWORK FOR BETTER UNDERSTANDING THE STATISTICAL DISTRIBUTION OF PLANETS IN THE MILKY WAY GALAXY, AND GUIDE LONGER-TERM PROJECTS THAT SEARCH FOR EARTH-MASS PLANETS MORE LOCALLY IN THE SOLAR NEIGHBORHOOD. Not listed $136.3k 8/11/16