MOA 2021-BLG-254

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Event Parameters

Internal ID:	gb17-R-4-25506
Discovery date:	2021-07-11T22:13:03
RA:	18:10:56.64
Dec:	-27:40:56.85
Current assessment:	microlensing

A transient event found by MOA.

Lightcurve

Finder chart

Nearest catalogued stars

starID	RA	Dec	mag	separation
166529	18:10:56.42	-27:40:57.93	17.68 ± 0.13	3.98
166573	18:10:56.49	-27:40:54.21	16.14 ± 0.06	3.37
166677	18:10:56.66	-27:40:52.52	18.71 ± 0.29	3.90
166704	18:10:56.70	-27:40:56.41	17.55 ± 0.10	0.28
166752	18:10:56.82	-27:40:57.38	17.13 ± 0.09	2.21

Last 5 photometry measurements

Observation date	I mag	seeing
2460245.899 (2023-Oct-28.399)	17.33 ± 0.06	2.96
2460245.931 (2023-Oct-28.431)	17.52 ± 0.11	3.35
2460246.862 (2023-Oct-29.362)	17.50 ± 0.08	3.55
2460246.903 (2023-Oct-29.403)	17.44 ± 0.10	3.39
2460246.931 (2023-Oct-29.431)	17.62 ± 0.17	3.82

Calibration: I = 27.40 - 2.5 log₁₀(ΔF + 8749.84)

Single lens fit parameters

t_max	=	JD 2459435.20	±	0.08 UT (2021-Aug-8.70)
t_E	=	36.64	±	1.88 days
u₀	=	0.5022	±	0.0374
I_base	=	17.58	±	0.26

External data

Gzipped FITS finder chart

All photometry data

Machine readable VOEvent notice