MOA 2021-BLG-221

Event Parameters

Internal ID:gb1-R-9-17782
Discovery date:2021-07-01T20:39:47
RA:17:50:01.94
Dec:-33:58:10.84
Current assessment:microlensing
A transient event found by MOA.

Lightcurve

Finder chart

Nearest catalogued stars

starIDRADecmagseparation
91239 17:50:02.17 -33:58:08.25 18.28 ± 0.11 4.89
91260 17:50:02.14 -33:58:11.63 16.20 ± 0.11 3.21
91370 17:50:01.92 -33:58:07.98 19.53 ± 0.30 3.60
91371 17:50:01.88 -33:58:11.00 16.19 ± 0.08 0.45
91517 17:50:01.57 -33:58:13.67 18.20 ± 0.11 4.75

Last 5 photometry measurements

Observation dateI magseeing
2460572.938 (2024-Sep-19.438) 16.17 ± 0.02 4.03
2460573.010 (2024-Sep-19.510) 16.07 ± 0.07 4.79
2460573.014 (2024-Sep-19.514) 15.91 ± 0.16 4.64
2460574.026 (2024-Sep-20.526) 16.27 ± 0.04 4.50
2460575.925 (2024-Sep-22.425) 16.17 ± 0.20 4.70

Calibration: I = 27.40 - 2.5 log10(ΔF + 30422.86)

Single lens fit parameters

tmax =JD 2459415.01 ± 0.01 UT (2021-Jul-19.51)
tE =0.81 ± 0.00 days
u0 =12.8128 ± 0.0297
Ibase =5.24 ± 0.22

External data

Gzipped FITS finder chart

All photometry data

Machine readable VOEvent notice