2025sdy

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Information

Transient

Name: AT2025sdy
Right ascension: 22h55m55.10s
Declination: 34d09m04.17s
Discovery Date: July 25, 2025, 10:32 p.m.
Classification: None
Redshift: None
MW E(B-V): 0.094

Host

Name:
Right ascension: 22h55m55.05s
Declination: 34d09m04.34s
Redshift: 0.053635
Photometric Redshift: 0.073

Processing Status

Task Name	Status	Time taken (s)	Warning Flag
Host match	processed	5.61
Cutout download	processed	33.34
Global aperture construction	processed	0.69
Local aperture photometry	processed	6.89
Global aperture photometry	processed	6.19
Validate local photometry	processed	0.03
Validate global photometry	processed	17.61
Host information	processed	0.14
Global host SED inference	processed	593.5
Local host SED inference	processed	523.95
Transient information	processed	0.0
Transient MWEBV	processed	0.11
Host MWEBV	processed	0.05
Processing status	completed	N/A	N/A

Cutout Download Report

2MASS_H: 2MASS_J: 2MASS_K: WISE_W1: WISE_W2: WISE_W3: WISE_W4: GALEX_NUV: GALEX_FUV: PanSTARRS_g: PanSTARRS_r: PanSTARRS_i: PanSTARRS_z: PanSTARRS_y: SDSS_i: SDSS_r: SDSS_u: SDSS_z: SDSS_g: DES_g: DES_r: DES_i: DES_z: DES_Y:

Aperture Photometry

Aperture details

RA, DEC (J2000) = 22h55m55.10s, 34d09m04.17s
semi major axis, semi minor axis (arcsec) = 1.92, 1.92
angle (degrees, anti-clockwise from east) = 0.0

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
SDSS_u	37.13	2.11	19.976	0.062	AB
SDSS_g	256.96	4.18	17.875	0.018	AB
DES_g	283.1	1.55	17.770	0.006	AB
PanSTARRS_g	272.31	0.58	17.812	0.002	AB
SDSS_r	665.5	6.74	16.842	0.011	AB
PanSTARRS_r	676.73	0.77	16.824	0.001	AB
DES_r	777.27	4.28	16.674	0.006	AB
SDSS_i	1103.61	8.71	16.293	0.009	AB
PanSTARRS_i	1100.31	0.76	16.296	0.001	AB
PanSTARRS_z	1408.74	1.9	16.028	0.001	AB
SDSS_z	1548.52	11.33	15.925	0.008	AB
DES_z	1607.08	10.13	15.885	0.007	AB
PanSTARRS_y	1640.75	2.98	15.862	0.002	AB

Aperture details

RA, DEC (J2000) = 22h55m55.00s, 34d09m04.49s
semi major axis, semi minor axis (arcsec) = 11.0, 6.87
angle (degrees, anti-clockwise from east) = -75.13

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
GALEX_FUV	0.96	3.18	23.946	3.597	AB
GALEX_NUV	4.64	2.23	22.233	0.523	AB
SDSS_u	155.59	7.36	18.420	0.051	AB
SDSS_g	784.1	7.52	16.664	0.010	AB
DES_g	847.43	2.79	16.580	0.004	AB
PanSTARRS_g	845.91	2.11	16.582	0.003	AB
SDSS_r	1950.89	12.01	15.674	0.007	AB
PanSTARRS_r	2003.73	2.47	15.645	0.001	AB
DES_r	2186.99	7.35	15.550	0.004	AB
SDSS_i	3104.19	15.5	15.170	0.005	AB
PanSTARRS_i	3127.61	2.81	15.162	0.001	AB
PanSTARRS_z	4028.2	7.62	14.887	0.002	AB
SDSS_z	4301.99	28.08	14.816	0.007	AB
DES_z	4425.25	17.05	14.785	0.004	AB
PanSTARRS_y	5102.78	12.95	14.630	0.003	AB
2MASS_J	6536.83	190.96	13.467	0.032	Vega
2MASS_H	8784.61	253.25	12.673	0.031	Vega
2MASS_K	7924.6	381.58	12.315	0.052	Vega
WISE_W1	3211.23	33.17	12.434	0.011	Vega
WISE_W2	1885.6	35.49	12.372	0.020	Vega
WISE_W3	684.18	88.16	11.638	0.140	Vega
WISE_W4	465.72	486.49	10.610	1.134	Vega

Imaging data

Spectral Energy Distribution

Host SED inference

Local parameter details

Documentation

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\,	10.282	10.379	10.490
{\rm log}_{10}({\rm SFR})	-0.913	-0.211	0.228
{\rm log}_{10}({\rm sSFR})	-11.344	-10.573	-10.116
{\rm stellar\ age}	6.497	7.719	10.369

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-1.590	-1.111	-0.761
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.826	-0.799	0.284

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.695	0.881	1.099
\delta	-0.871	-0.742	-0.604
\tau_1/\tau_2	0.633	0.966	1.331
Q_{PAH}	0.540	1.800	4.577
U_{min}	2.727	7.756	14.987
{\rm log}_{10}(\gamma_e)\,	-3.301	-2.056	-0.764

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-3.935	-2.170	-0.546
{\rm log}_{10}(\tau_{AGN})\,	0.931	1.499	2.024

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-0.685	-0.071	0.218
0.03-0.10 Gyr	-1.533	-0.361	0.267
0.10-0.33 Gyr	-1.811	-0.380	0.247
0.33-1.08 Gyr	-1.827	-0.301	0.278
1.08-3.57 Gyr	-1.487	0.057	0.493
3.57-11.74 Gyr	-0.033	0.478	0.655
11.74-13.04 Gyr	-0.017	0.621	1.405

Global parameter details

Documentation

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\,	10.899	10.989	11.028
{\rm log}_{10}({\rm SFR})	-3.707	-1.632	-0.678
{\rm log}_{10}({\rm sSFR})	-14.640	-12.607	-11.684
{\rm stellar\ age}	9.026	12.313	12.386

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-0.871	-0.629	-0.470
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.417	-0.236	0.331

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.228	0.360	0.532
\delta	-0.701	-0.449	-0.237
\tau_1/\tau_2	0.409	0.838	1.282
Q_{PAH}	0.299	0.858	1.663
U_{min}	3.343	9.214	17.153
{\rm log}_{10}(\gamma_e)\,	-3.252	-2.238	-1.471

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-4.545	-3.767	-2.796
{\rm log}_{10}(\tau_{AGN})\,	1.055	1.558	1.929

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-4.874	-1.871	-0.822
0.03-0.10 Gyr	-4.994	-1.937	-0.647
0.10-0.33 Gyr	-6.368	-2.943	-1.089
0.33-1.08 Gyr	-6.977	-3.483	-1.381
1.08-3.57 Gyr	-4.743	-2.480	-0.765
3.57-11.74 Gyr	-2.119	-0.566	1.050
11.74-13.04 Gyr	1.498	2.119	2.168