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
2460245.923 (2023-Oct-28.423) 16.15 ± 0.04 3.66
2460245.937 (2023-Oct-28.437) 16.10 ± 0.05 3.93
2460246.859 (2023-Oct-29.359) 16.15 ± 0.03 3.84
2460246.892 (2023-Oct-29.392) 16.17 ± 0.03 3.69
2460246.926 (2023-Oct-29.426) 16.10 ± 0.03 3.67

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