2025aczh

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Information

Transient

Name: AT2025aczh
Right ascension: 9h39m39.86s
Declination: 56d22m48.95s
Discovery Date: Oct. 24, 2025, 12:38 p.m.
Classification: None
Redshift: None
MW E(B-V): 0.016

Host

Name:
Right ascension: 9h39m39.75s
Declination: 56d22m50.40s
Redshift: None
Photometric Redshift: 0.080

Processing Status: completed

Task Name	Status	Time taken (s)
Cutout download	processed	16.19
Transient MWEBV	processed	0.04
Host match	processed	4.77
Host information	processed	0.18
Host MWEBV	processed	0.04
Global aperture construction	processed	0.6
Global aperture photometry	processed	4.98
Validate global photometry	processed	14.06
Global host SED inference	processed	407.72
Local aperture photometry	processed	5.3
Validate local photometry	processed	0.02
Local host SED inference	processed	462.11

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) = 9h39m39.86s, 56d22m48.95s
semi major axis, semi minor axis (arcsec) = 1.33, 1.33
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	8.64	0.31	21.559	0.039	AB
SDSS_r	10.9	1.01	21.306	0.100	AB
PanSTARRS_r	9.68	0.4	21.436	0.045	AB
SDSS_i	13.08	1.33	21.108	0.110	AB
PanSTARRS_i	11.91	0.42	21.210	0.038	AB
PanSTARRS_z	12.43	1.11	21.164	0.097	AB
SDSS_z	12.92	3.41	21.122	0.287	AB
PanSTARRS_y	19.48	2.77	20.676	0.154	AB

Aperture details

RA, DEC (J2000) = 9h39m39.76s, 56d22m50.20s
semi major axis, semi minor axis (arcsec) = 5.25, 4.09
angle (degrees, anti-clockwise from east) = -62.41

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
GALEX_FUV	17.21	4.07	20.810	0.257	AB
GALEX_NUV	15.47	0.65	20.926	0.045	AB
SDSS_u	15.77	2.99	20.906	0.206	AB
SDSS_g	47.24	2.13	19.714	0.049	AB
PanSTARRS_g	49.91	1.08	19.655	0.023	AB
SDSS_r	61.67	2.79	19.425	0.049	AB
PanSTARRS_r	63.49	1.37	19.393	0.023	AB
SDSS_i	69.48	4.01	19.295	0.063	AB
PanSTARRS_i	74.04	1.43	19.226	0.021	AB
PanSTARRS_z	63.63	3.81	19.391	0.065	AB
SDSS_z	72.4	11.75	19.251	0.176	AB
PanSTARRS_y	99.23	9.51	18.908	0.104	AB
2MASS_J	103.07	108.75	17.972	1.146	Vega
2MASS_H	118.11	176.0	17.352	1.618	Vega
2MASS_K	140.5	185.51	16.693	1.433	Vega
WISE_W1	27.11	7.12	17.618	0.285	Vega
WISE_W2	26.42	9.83	17.006	0.404	Vega
WISE_W3	31.63	48.25	14.976	1.656	Vega
WISE_W4	176.85	317.12	11.661	1.947	Vega

Imaging data

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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})\,	7.791	8.129	8.315
{\rm log}_{10}({\rm SFR})	-1.918	-0.802	-0.141
{\rm log}_{10}({\rm sSFR})	-10.146	-8.976	-7.931
{\rm stellar\ age}	0.100	1.424	5.422

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-1.462	-0.525	0.002
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.208	-0.515	0.073

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.218	0.588	1.257
\delta	-0.470	-0.041	0.249
\tau_1/\tau_2	0.592	1.056	1.512
Q_{PAH}	1.096	3.109	5.403
U_{min}	3.194	8.980	17.148
{\rm log}_{10}(\gamma_e)\,	-2.831	-1.665	-0.551

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-1.616	-0.251	0.187
{\rm log}_{10}(\tau_{AGN})\,	1.181	1.569	1.979

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-3.008	-1.755	-1.250
0.03-0.10 Gyr	-2.049	-0.671	0.015
0.10-0.33 Gyr	-3.056	-1.228	-0.460
0.33-1.07 Gyr	-4.800	-1.889	-1.069
1.07-3.50 Gyr	-6.487	-2.846	-1.564
3.50-11.43 Gyr	-7.171	-3.265	-1.799
11.43-12.70 Gyr	-7.327	-2.966	-1.656

Global parameter details

Documentation

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\,	8.839	9.003	9.139
{\rm log}_{10}({\rm SFR})	-0.660	-0.419	-0.137
{\rm log}_{10}({\rm sSFR})	-9.706	-9.437	-9.048
{\rm stellar\ age}	3.848	5.613	6.852

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-1.230	-0.445	-0.073
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-0.190	0.020	0.156

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.056	0.179	0.384
\delta	-0.159	0.170	0.329
\tau_1/\tau_2	0.807	1.171	1.537
Q_{PAH}	0.698	1.886	3.823
U_{min}	2.573	7.767	14.343
{\rm log}_{10}(\gamma_e)\,	-2.568	-1.394	-0.416

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-3.472	-1.504	-0.728
{\rm log}_{10}(\tau_{AGN})\,	1.195	1.573	1.895

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-0.758	-0.580	-0.410
0.03-0.10 Gyr	-0.674	-0.359	-0.033
0.10-0.33 Gyr	-0.713	-0.445	-0.172
0.33-1.07 Gyr	-1.113	-0.750	-0.503
1.07-3.50 Gyr	-1.273	-0.922	-0.700
3.50-11.43 Gyr	-1.411	-1.015	-0.774
11.43-12.70 Gyr	-1.564	-0.966	-0.534