adding request for OpSim run

opsim/Proposal_WFIRST-micro.md

@@ -1,18 +1,52 @@
-# "Coordination with WFIRST: microlensing"
+# "Coordination with WFIRST: exoplanet demographics from microlensing experiment"
 
 A Proposed OpSim Experiment.
 
 *Proposer(s): Radek Poleski, Matthew Penny*
 
-*Issue Thread: [#01](https://github.com/LSSTScienceCollaborations/ObservingStrategy/issues/01)*
+*Issue Thread: [#687](https://github.com/LSSTScienceCollaborations/ObservingStrategy/issues/687)*
 
 
 ## Proposed Changes to the Observing Strategy
-How would you want to change the constraints on the simulated
-scheduler? Do you want it to do something new?
 
+We propose improved coverage of the WFIRST microlensing field located 
+approximately at the Galactic coordinates l = 1 deg, b = -1 deg.
+First, we propose observations with 15 minute cadence simultaneously with 
+the WFIRST observations, i.e., during each of six 72-day WFIRST exoplanet 
+campaigns. The campaigns are in spring and fall (3 starting in fall 2026 and 
+3 starting in 2029) when the field is visible for a short time each night.
+Second, we propose additional single visit each night outside 
+the WFIRST campaigns. These observations should start a year before and end 
+a year after the WFIRST microlensing survey.
+
+The WFIRST microlensing field is approximately defined by a polygon in (l,b) 
+coordinates:
+(-0.5, -2.04), (-0.5, -1.24), (0.73, -1.24), (0.73, -0.46), (1.62, -0.46), (1.62, -2.04).
+The field can be fully covered by a single LSST pointing. We request 
+observations in *z* or *i* bands because of high extinction.
 
 ## Science Motivation
 
-Write a few sentences about why you want to make this change. Which
-science projects will benefit, do you expect?
+The simultaneous observations of a planetary microlensing event from
+the ground and a satellite allow direct measurement of the planet mass
+and distance thanks to the microlensing parallax effect.
+The combination of the WFIRST and the LSST observations is a unique
+opportunity to measure the masses of the free-floating planets.
+We request observations with cadence matched to WFIRST and to be taken in
+the red filters to reduce the impact of interstellar extinction.
+
+The second part of the proposed observations will allow better
+characterization of some of the WFIRST events, most importantly the ones
+that show planetary signals during the WFIRST campaigns,
+but planet host peak is not covered by the WFIRST. In the extreme cases,
+the LSST observations will allow detection of host stars for planets
+that seem free-floating based on the WFIRST data alone. The LSST observations
+will also prompt higher-cadence observations on smaller telescopes
+for events showing particularly interesting features.
+
+WFIRST will image the microlensing field around 15,000 times with
+HST-like quality. This wealth of data will allow multiple additional
+investigations for which LSST coverage may be useful:
+accurate measurements of parallaxes and proper motions,
+studies of variable stars, and investigation of Solar System bodies.
+

opsim/README.md

@@ -25,7 +25,7 @@ NEO optimized runs | SS SC | [#120](https://github.com/LSSTScienceCollaborations
 [Normal Plane](https://github.com/LSSTScienceCollaborations/ObservingStrategy/blob/master/opsim/Proposal_GP.md) | [Strader](https://github.com/caprastro) (for SMWLV) | [#162](https://github.com/LSSTScienceCollaborations/ObservingStrategy/issues/162) | Do Galactic Plane with normal WFD cadence
  [Rolling Cadence Optimized for SN Cosmology](https://github.com/LSSTScienceCollaborations/ObservingStrategy/blob/master/opsim/Proposal_SN.md) | [Jeonghee Rho ](https://github.com/jhrlsst) [and SN Cosmology Team] | [#159](https://github.com/LSSTScienceCollaborations/ObservingStrategy/issues/159) | Modified Rolling Cadence for densely populated SN light curves
  [Coordinate with Euclid](https://github.com/LSSTScienceCollaborations/ObservingStrategy/blob/master/opsim/Proposal_Euclid.md) | [Andrew Connolly](https://github.com/connolly) and Tony Tyson | [#530](https://github.com/LSSTScienceCollaborations/ObservingStrategy/issues/530) | An extension of the northern footprint of the Survey to Dec < +30 with no pairs of visits
- [Coordination with WFIRST microlensing](https://github.com/LSSTScienceCollaborations/ObservingStrategy/blob/master/opsim/Proposal_WFIRST-micro.md) | [Poleski](https://github.com/rpoleski), [Penny](https://github.com/mtpenny) | ... | Add special (micro-)survey to cover WFIRST microlensing field
+ [Coordination with WFIRST: exoplanet demographics from microlensing experiment](https://github.com/LSSTScienceCollaborations/ObservingStrategy/blob/master/opsim/Proposal_WFIRST-micro.md) | [Poleski](https://github.com/rpoleski), [Penny](https://github.com/mtpenny) | [#687](https://github.com/LSSTScienceCollaborations/ObservingStrategy/issues/687) | Add special (micro-)survey to cover WFIRST microlensing field
  [Single filter Northern Ecliptic Spur](Proposal_single_filter_northern_ecliptic_spur.md) | [mschwamb](https://github.com/mschwamb)| ... | Observe the Northern Ecliptic Spur in a single filter (r or g)
  [...](https://github.com/LSSTScienceCollaborations/ObservingStrategy/blob/master/opsim/) | [...](https://github.com/) | [...](https://github.com/LSSTScienceCollaborations/ObservingStrategy/issues/)
 Here's the [proposal template](https://github.com/LSSTScienceCollaborations/ObservingStrategy/blob/master/opsim/Proposal_Template.md)