2025ysu

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Information

Transient

Name: AT2025ysu
Right ascension: 2h46m11.96s
Declination: 20d10m42.65s
Discovery Date: Sept. 27, 2025, 12:43 a.m.
Classification: None
Redshift: None
MW E(B-V): 0.093

Host

Name:
Right ascension: 2h46m12.17s
Declination: 20d10m44.89s
Redshift: None
Photometric Redshift: 0.078

Processing Status: completed

Task Name	Status	Time taken (s)
Cutout download	processed	15.78
Transient MWEBV	processed	0.05
Host match	processed	5.53
Host information	processed	0.11
Host MWEBV	processed	0.04
Global aperture construction	processed	0.67
Global aperture photometry	processed	5.18
Validate global photometry	processed	14.54
Global host SED inference	processed	512.38
Local aperture photometry	processed	5.1
Validate local photometry	processed	0.02
Local host SED inference	processed	469.11

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) = 2h46m11.96s, 20d10m42.65s
semi major axis, semi minor axis (arcsec) = 1.35, 1.35
angle (degrees, anti-clockwise from east) = 0.0

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
PanSTARRS_g	7.4	0.32	21.727	0.047	AB
SDSS_r	14.75	1.14	20.978	0.084	AB
PanSTARRS_r	13.11	0.52	21.106	0.043	AB
SDSS_i	18.72	1.48	20.719	0.086	AB
PanSTARRS_i	17.95	0.46	20.765	0.028	AB
PanSTARRS_z	20.88	1.06	20.601	0.055	AB
SDSS_z	22.61	4.04	20.514	0.194	AB
PanSTARRS_y	26.33	2.18	20.349	0.090	AB

Aperture details

RA, DEC (J2000) = 2h46m12.16s, 20d10m45.00s
semi major axis, semi minor axis (arcsec) = 6.99, 6.05
angle (degrees, anti-clockwise from east) = -132.81

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
GALEX_FUV	16.2	4.04	20.876	0.271	AB
GALEX_NUV	21.73	3.43	20.557	0.171	AB
SDSS_u	42.07	4.94	19.840	0.128	AB
SDSS_g	114.64	3.29	18.752	0.031	AB
PanSTARRS_g	135.39	1.55	18.571	0.012	AB
SDSS_r	234.89	4.85	17.973	0.022	AB
PanSTARRS_r	221.12	2.48	18.038	0.012	AB
SDSS_i	320.43	6.67	17.636	0.023	AB
PanSTARRS_i	325.36	2.22	17.619	0.007	AB
PanSTARRS_z	376.57	5.07	17.460	0.015	AB
SDSS_z	343.62	19.27	17.560	0.061	AB
PanSTARRS_y	473.15	10.44	17.212	0.024	AB
2MASS_J	445.45	143.35	16.383	0.349	Vega
2MASS_H	857.72	248.94	15.199	0.315	Vega
2MASS_K	251.07	288.09	16.063	1.246	Vega
WISE_W1	230.64	13.36	15.294	0.063	Vega
WISE_W2	149.86	15.56	15.122	0.113	Vega
WISE_W3	510.65	84.9	11.956	0.181	Vega
WISE_W4	419.82	522.03	10.722	1.350	Vega

Imaging data

Click the image to load the interactive plot.

Spectral Energy Distribution

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Host SED inference

Local parameter details

Documentation

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\,	8.560	8.762	8.910
{\rm log}_{10}({\rm SFR})	-1.903	-1.276	-0.308
{\rm log}_{10}({\rm sSFR})	-10.720	-10.063	-8.952
{\rm stellar\ age}	1.994	6.142	7.741

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-1.532	-0.849	-0.242
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.450	-0.674	0.089

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.303	0.779	1.477
\delta	-0.303	0.042	0.273
\tau_1/\tau_2	0.688	1.070	1.456
Q_{PAH}	0.836	2.554	5.205
U_{min}	3.227	8.890	16.656
{\rm log}_{10}(\gamma_e)\,	-2.697	-1.538	-0.488

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-2.729	-0.365	0.204
{\rm log}_{10}(\tau_{AGN})\,	1.022	1.509	1.987

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-2.356	-1.573	-0.928
0.03-0.10 Gyr	-2.046	-1.262	-0.228
0.10-0.33 Gyr	-2.160	-1.331	-0.541
0.33-1.07 Gyr	-2.443	-1.362	-0.773
1.07-3.50 Gyr	-2.743	-1.259	-0.953
3.50-11.45 Gyr	-2.783	-1.219	-0.949
11.45-12.72 Gyr	-2.854	-1.259	-0.636

Global parameter details

Documentation

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\,	10.027	10.091	10.172
{\rm log}_{10}({\rm SFR})	-0.270	-0.049	0.183
{\rm log}_{10}({\rm sSFR})	-10.385	-10.150	-9.908
{\rm stellar\ age}	7.693	9.312	11.678

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-0.640	-0.494	-0.373
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	0.000	0.148	0.290

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.022	0.059	0.126
\delta	-0.722	-0.329	0.080
\tau_1/\tau_2	0.967	1.379	1.748
Q_{PAH}	0.722	1.908	3.584
U_{min}	2.625	7.718	14.866
{\rm log}_{10}(\gamma_e)\,	-2.270	-1.280	-0.477

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-4.285	-3.103	-1.956
{\rm log}_{10}(\tau_{AGN})\,	1.099	1.556	1.910

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-0.537	-0.382	-0.255
0.03-0.10 Gyr	-0.217	0.052	0.311
0.10-0.33 Gyr	-1.140	-0.511	-0.161
0.33-1.07 Gyr	-1.815	-0.966	-0.548
1.07-3.50 Gyr	-1.799	-0.929	-0.428
3.50-11.45 Gyr	-0.844	0.119	0.292
11.45-12.72 Gyr	0.219	0.884	1.289