2025ahdg

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Information

Transient

Name: AT2025ahdg
Right ascension: 12h00m02.22s
Declination: 43d07m24.18s
Discovery Date: Dec. 16, 2025, 9:44 a.m.
Classification: None
Redshift: None
MW E(B-V): 0.014

Host

Name:
Right ascension: 12h00m02.39s
Declination: 43d07m23.68s
Redshift: None
Photometric Redshift: 0.077

Processing Status: completed

Task Name	Status	Time taken (s)
Cutout download	processed	17.88
Transient MWEBV	processed	0.04
Host match	processed	4.96
Host information	processed	0.23
Host MWEBV	processed	0.04
Global aperture construction	processed	2.46
Global aperture photometry	processed	5.14
Validate global photometry	processed	15.14
Global host SED inference	processed	496.27
Local aperture photometry	processed	5.68
Validate local photometry	processed	0.02
Local host SED inference	processed	447.64

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) = 12h00m02.22s, 43d07m24.18s
semi major axis, semi minor axis (arcsec) = 1.37, 1.37
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	6.58	0.25	21.855	0.042	AB
SDSS_r	7.02	0.91	21.784	0.141	AB
PanSTARRS_r	9.56	0.55	21.449	0.062	AB
SDSS_i	10.8	1.26	21.316	0.127	AB
PanSTARRS_i	11.52	0.57	21.246	0.053	AB
PanSTARRS_z	10.73	1.26	21.324	0.127	AB
SDSS_z	9.93	3.24	21.408	0.355	AB
PanSTARRS_y	11.6	2.2	21.239	0.206	AB

Aperture details

RA, DEC (J2000) = 12h00m02.37s, 43d07m23.93s
semi major axis, semi minor axis (arcsec) = 8.29, 4.22
angle (degrees, anti-clockwise from east) = -93.52

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
GALEX_FUV	9.53	2.92	21.452	0.333	AB
GALEX_NUV	8.84	2.19	21.534	0.269	AB
SDSS_u	26.93	4.2	20.325	0.169	AB
SDSS_g	27.28	2.29	20.310	0.091	AB
PanSTARRS_g	34.15	1.07	20.067	0.034	AB
SDSS_r	42.57	3.16	19.827	0.081	AB
PanSTARRS_r	25.39	2.33	20.388	0.100	AB
SDSS_i	73.79	4.7	19.230	0.069	AB
PanSTARRS_i	54.24	2.42	19.564	0.048	AB
PanSTARRS_z	62.58	5.4	19.409	0.094	AB
SDSS_z	87.07	13.76	19.050	0.172	AB
PanSTARRS_y	60.97	9.35	19.437	0.166	AB
2MASS_J	219.72	129.31	17.150	0.639	Vega
2MASS_H	-12.72	178.95			Vega
2MASS_K	18.91	217.45	18.870	12.484	Vega
WISE_W1	29.27	10.79	17.535	0.400	Vega
WISE_W2	17.29	12.77	17.466	0.802	Vega
WISE_W3	77.86	60.34	13.998	0.841	Vega
WISE_W4	317.75	327.7	11.025	1.120	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})\,	8.119	8.334	8.480
{\rm log}_{10}({\rm SFR})	-1.866	-1.359	-0.802
{\rm log}_{10}({\rm sSFR})	-10.267	-9.740	-9.079
{\rm stellar\ age}	2.282	5.498	7.018

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-1.682	-1.086	-0.322
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.621	-0.897	-0.056

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.258	0.607	1.081
\delta	-0.342	0.057	0.292
\tau_1/\tau_2	0.706	1.046	1.399
Q_{PAH}	1.264	3.058	5.207
U_{min}	2.716	7.742	14.871
{\rm log}_{10}(\gamma_e)\,	-2.819	-1.783	-0.797

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-1.454	-0.245	0.212
{\rm log}_{10}(\tau_{AGN})\,	1.148	1.572	1.949

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-1.909	-1.367	-0.930
0.03-0.10 Gyr	-2.011	-1.391	-0.775
0.10-0.33 Gyr	-1.972	-1.375	-0.838
0.33-1.07 Gyr	-2.164	-1.495	-1.074
1.07-3.50 Gyr	-2.374	-1.603	-1.322
3.50-11.47 Gyr	-2.652	-1.696	-1.409
11.47-12.74 Gyr	-2.831	-1.773	-1.232

Global parameter details

Documentation

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\,	8.456	8.950	9.200
{\rm log}_{10}({\rm SFR})	-0.335	0.128	0.499
{\rm log}_{10}({\rm sSFR})	-9.427	-8.767	-8.033
{\rm stellar\ age}	1.570	6.419	8.586

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-1.204	-0.382	-0.027
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.646	-0.543	0.176

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.304	0.734	1.313
\delta	0.006	0.220	0.329
\tau_1/\tau_2	0.660	1.124	1.614
Q_{PAH}	0.531	1.596	3.625
U_{min}	2.668	7.887	15.712
{\rm log}_{10}(\gamma_e)\,	-3.371	-2.118	-0.823

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-3.925	-2.220	-0.663
{\rm log}_{10}(\tau_{AGN})\,	1.072	1.480	1.858

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-0.575	-0.249	0.075
0.03-0.10 Gyr	-0.348	0.199	0.601
0.10-0.33 Gyr	-3.490	-1.797	-0.880
0.33-1.07 Gyr	-5.058	-2.019	-1.264
1.07-3.50 Gyr	-3.869	-1.649	-1.030
3.50-11.47 Gyr	-2.909	-1.144	-0.727
11.47-12.74 Gyr	-2.754	-0.956	-0.178