...
363 events from https://arxiv.org/abs/2206.06121, used the Ex. 1 query in appendix B (which downloads the entire catalog) at https://gea.esac.esa.int/archive/
Note: used the event duration from the level 0 fit as the event duration (paczynski0_te).
also downloaded planet excursion RA Dec: 324.545 26.46656 for event AT2021uey (below is the plot of the data):
Quality Cuts and Compilation of Sources
Overall, for KMT events 15434 sources out of 15689 in the text file KMTeventsSorted.txt.
For Gaia events 286 sources out of 363 sources in the arXiv were found (77 had no data to download).
Additionally, we have AT2021uey, reported by Makiko Ban•Astronomical25
Observatory, University of Warsaw at Paris ulensing workshop
This gives a total of 15721 light curves (although I need to request AT2021uey over a wider range of dates).
As far as overlapping sources go, 72 of the 363 Gaia sources have a KMT event within 2 arcsec and with a peak within 100 days of the Gaia peak, meaning they are presumably the same source (although interestingly 3 of these have two KMT events that match. Also, if we instead look within 3 tau of the Gaia event duration we have 77 sources matching KMT events (and four sources matching two KMT events)). However, the difference of a couple arcsec can lead to differences of 0.5 mag (need to quantify this more).
All Gaia and KMT events were uploaded to /n/stubbs_lab/Lab/Microlensing/ATLAS_events_cuts and then there was an extra column added, 0 for a bad point, 1 for a good point, with the cut being:
1. $\sigma_{ABmag}<$0.5,
2. PSF-fit $\chi^2/DOF <$3.0,
3. Sky $>$ 15 mag per sq arc sec.
The relevant notebook used to do this is in /n/stubbs_lab/Users/eurbach.
Not sure how to deal with the overlapping sources between Gaia and KMT (they also have slightly different peak durations and dates) and also I am looking at error more generally by looking at light curves offset by 20 arcsec in RA.
However, very few events have many good points with SNR > 5 within 3 tau of center. Of the 286 Gaia curves, 62 have more than one point of SNR > 5 within 3 tau of center, and 32 have more than five points with SNR > 5 within 5 tau of center. 161 have at least one 'good' point within 3 tau of center, and 125 have at least 5 good points within 3 tau of center.
For the KMT events, there are 2101 events with one point with SNR > 5 within 3 tau of center and 896 events with more than five points with SNR > 5 within 3 tau of center. 13062 have at least one 'good' point within 3 tau of center, and 10037 have at least 5 good points within 3 tau of center.
We have decided to use the cutoff for inclusion as 3 good events within 3t of center. There are 12213 in KMT and 154 in Gaia + AT2021uey is 12368 events.
Of those, for Gaia: 88 events have 1+ points with SNR > 5, 44 have 3 or more points with SNR > 5
for KMT, 3411 events have 1+ points with SNR > 5, 1576 have 3 or more points with SNR > 5
Questions to answer:
- How many good points (and/or points with high SNR) are needed to include in the database? Current answer - just need 3 points within 3 tau