2025sih

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Information

Transient

Name: AT2025sih
Right ascension: 16h17m46.10s
Declination: 62d51m51.30s
Discovery Date: July 23, 2025, 5:50 p.m.
Classification: None
Redshift: None
MW E(B-V): 0.015

Host

Name:
Right ascension: 16h17m45.98s
Declination: 62d51m51.00s
Redshift: 0.092591
Photometric Redshift: 0.086

Processing Status: completed

Task Name	Status	Time taken (s)
Cutout download	processed	36.02
Transient MWEBV	processed	0.1
Host match	processed	5.26
Host information	processed	0.15
Host MWEBV	processed	0.04
Global aperture construction	processed	0.63
Global aperture photometry	processed	4.58
Validate global photometry	processed	14.21
Global host SED inference	processed	527.04
Local aperture photometry	processed	5.24
Validate local photometry	processed	0.02
Local host SED inference	processed	477.17

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) = 16h17m46.10s, 62d51m51.30s
semi major axis, semi minor axis (arcsec) = 1.16, 1.16
angle (degrees, anti-clockwise from east) = 0.0

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
PanSTARRS_i	188.52	0.4	18.212	0.002	AB
PanSTARRS_z	241.31	0.89	17.944	0.004	AB
PanSTARRS_y	260.96	2.23	17.859	0.009	AB

Aperture details

RA, DEC (J2000) = 16h17m45.98s, 62d51m51.18s
semi major axis, semi minor axis (arcsec) = 7.36, 5.17
angle (degrees, anti-clockwise from east) = -86.56

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
GALEX_FUV	4.13	2.13	22.359	0.559	AB
GALEX_NUV	3.59	2.34	22.512	0.707	AB
SDSS_u	48.3	4.86	19.690	0.109	AB
SDSS_g	250.31	4.38	17.904	0.019	AB
PanSTARRS_g	275.35	1.87	17.800	0.007	AB
SDSS_r	566.74	6.67	17.017	0.013	AB
PanSTARRS_r	575.82	1.68	16.999	0.003	AB
SDSS_i	866.52	8.93	16.556	0.011	AB
PanSTARRS_i	837.4	1.88	16.593	0.002	AB
PanSTARRS_z	1051.94	4.37	16.345	0.005	AB
SDSS_z	1136.89	17.88	16.261	0.017	AB
PanSTARRS_y	1236.12	11.64	16.170	0.010	AB
2MASS_J	1480.3	156.9	15.079	0.115	Vega
2MASS_H	1874.59	231.13	14.350	0.134	Vega
2MASS_K	1812.27	261.08	13.917	0.156	Vega
WISE_W1	634.71	9.15	14.195	0.016	Vega
WISE_W2	379.63	11.23	14.113	0.032	Vega
WISE_W3	63.78	33.57	14.214	0.571	Vega
WISE_W4	-449.1	209.28			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})\,	9.730	9.942	10.112
{\rm log}_{10}({\rm SFR})	-1.725	-0.542	0.207
{\rm log}_{10}({\rm sSFR})	-11.704	-10.513	-9.618
{\rm stellar\ age}	4.140	7.071	10.148

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-1.061	-0.583	-0.186
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.444	-0.715	-0.001

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.233	0.524	0.857
\delta	-0.835	-0.485	-0.090
\tau_1/\tau_2	0.591	0.954	1.364
Q_{PAH}	0.563	2.362	5.252
U_{min}	3.118	8.211	15.573
{\rm log}_{10}(\gamma_e)\,	-3.234	-2.197	-0.684

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-2.809	-1.028	-0.438
{\rm log}_{10}(\tau_{AGN})\,	1.081	1.458	1.879

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-2.143	-0.886	-0.327
0.03-0.10 Gyr	-1.979	-0.564	0.327
0.10-0.33 Gyr	-2.059	-0.527	0.214
0.33-1.06 Gyr	-2.222	-0.428	0.264
1.06-3.46 Gyr	-2.102	-0.302	0.140
3.46-11.29 Gyr	-1.240	-0.085	0.210
11.29-12.54 Gyr	-0.795	0.153	1.058

Global parameter details

Documentation

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\,	10.633	10.735	10.834
{\rm log}_{10}({\rm SFR})	-4.711	-1.493	-0.089
{\rm log}_{10}({\rm sSFR})	-15.673	-12.318	-10.794
{\rm stellar\ age}	7.229	9.108	11.896

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-1.757	-1.464	-1.147
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.424	-0.595	0.136

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.395	0.524	0.675
\delta	-0.921	-0.772	-0.567
\tau_1/\tau_2	0.477	0.904	1.389
Q_{PAH}	0.474	1.858	3.682
U_{min}	3.726	10.704	18.632
{\rm log}_{10}(\gamma_e)\,	-3.144	-2.097	-1.033

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-4.456	-3.417	-2.386
{\rm log}_{10}(\tau_{AGN})\,	1.106	1.599	1.980

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-5.619	-2.121	-0.559
0.03-0.10 Gyr	-5.712	-1.898	0.023
0.10-0.33 Gyr	-5.551	-2.145	0.024
0.33-1.06 Gyr	-5.296	-2.401	-0.235
1.06-3.46 Gyr	-3.708	-1.391	0.392
3.46-11.29 Gyr	-1.785	0.559	1.004
11.29-12.54 Gyr	-0.560	1.472	1.984