microlensing photometry

June 1 2022. 

ATLAS covers sky to 19.5 at 5 sigma. That's an uncertainty of 20% or 0.2 mag. The all-sky, nightly coverage from multiple sites makes this an excellent resource for microlensing. 

Microlensing surveys: 
OGLE, Las Campanas in Chile, has been shut down for years due to COVID
MOA in New Zealand 
KMTNET has telescopes in Chile, South Africa, Australia. 

Web sites with microlensing events (note the anomalous ones are arguably the most interesting)

MOA: http://www.massey.ac.nz/~iabond/moa/alert2022/alert.php 
KMTNET: https://kmtnet.kasi.re.kr/ulens/.   and https://kmtnet.kasi.re.kr/ulens/event/2022/ 
OGLE: http://ogle.astrouw.edu.pl/ogle4/ews/ews.html  

Galactic bulge reanalysis and compendium from OGLE: https://aasnova.org/2022/05/20/a-massive-reanalysis-of-microlensing-events/

MOA anomaly events http://iral2.ess.sci.osaka-u.ac.jp/~moa/anomaly/ 

ATLAS forced photometry server: https://fallingstar-data.com/forcedphot/ 

Some examples: 

KMT-2022-BLG-0061, difference request

JT says 2022 observations from Chile aren't in the forced photometry data, and that the Hawaii telescope stayed in the N after early calendar 2022. So need to look back into previous years. 

Brighter ones do better:

Converting to magnitudes, for the more pedestrian among us: 

m_AB=-2.5log10(Jy) + 8.90. 

ATLAS started operation mid-2015, so it's appropriate to compile a list of events from calendar 2015 to 2022. That spans both OGLE (until 2020) and MOA, not sure about KMT. 

MOA to OGLE correspondences: https://www.massey.ac.nz/~iabond/moa/alert2016/moa2ogle.php

MKTnet telescopes go fainter. Use their event catalogs from online data set. 

text file columns: 

name,  DiscoveryField,  Class(1=clear, 2=probable), RA, DEC, MJDcenter, duration (days), impact parameter ~ 1/Amplification, Iband1, Iband2, Iband3, Ctype (??), Amplification, other names

Tasks: 

1) construct aggregated event list that spans years when ATLAS observed Galactic plane.

                                        DONE- had to clean up changes in data format between years, for KMT alert files, and delete a few incomplete records. KMTevents.txt has around 15,000 candidate bulge events.

                                        event file sorted from bright to faint: KMTeventsSorted.txt 

2) for each event, do a query on forced photometry difference photometry for duration spanning 10 event duration times on either side of event center.
3) construct database of event photometry.  We should extract both regular and difference image forced photometry. 

Things we can do: 1) fill in gaps from Chile and S Africa
                                2) use multi-band data to plot c vs. o fluxes, investigate blending and chromaticity. 
                                3) added information for anomalous events, temporal coverage. 

stress in paper-

MJD coverage, esp for planets. example is MOA-2019-BLG-055 / OGLE-2019-BLG-0109. planet excursion. No planet indication in OGLE data, but it is there in MOA data. 

blue is ATLAS, red is MOA, orange is OGLE

public server for photometry

CWS notes from Paris 2022 microlensing meeting

schedule is https://bit.ly/ulens25-schedule

planetary excursion of short duration, perhaps in halo, AT2021uey Makiko Ben 

xallarap example is OGLE-2017-BLG-0114

another xallarap example is OGLE-2019-BLG-0825, 5.5 day period xallarap

See P. Rota et al 2021 for xallrap example,  

K2-2016-BLG-0001

Roman launch Sept 2026 is current best-guess

0.1 arcsec pixels, 8 filters, 0.43 to 2.4 microns. 

Need to connect with Rachael Street about Omega project and all-sky microlensing

GAIA ends 2025, to 20.5 mag

one mas at 18th for DR3

GAIA 20 FNR is interetsing event

Gaia Microlensing data:

363 events from https://arxiv.org/abs/2206.06121, used the Ex. 1 query in appendix B (which downloads the entire catalog)