2025sgi

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Information

Transient

Name: AT2025sgi
Right ascension: 18h32m43.08s
Declination: 64d54m18.38s
Discovery Date: July 25, 2025, 7:42 p.m.
Classification: None
Redshift: None
MW E(B-V): 0.034

Host

Name:
Right ascension: 18h32m43.03s
Declination: 64d54m18.10s
Redshift: None
Photometric Redshift: 0.175

Processing Status

Task Name	Status	Time taken (s)	Warning Flag
Host match	processed	5.84
Cutout download	processed	33.93
Global aperture construction	processed	0.65
Local aperture photometry	processed	5.47
Global aperture photometry	processed	4.61
Validate local photometry	no valid phot	0.02
Validate global photometry	processed	14.24
Host information	processed	0.13
Global host SED inference	processed	490.91
Local host SED inference	not processed	None
Transient information	processed	0.0
Transient MWEBV	processed	0.08
Host MWEBV	processed	0.04
Processing status	blocked	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) = 18h32m43.08s, 64d54m18.38s
semi major axis, semi minor axis (arcsec) = 0.68, 0.68
angle (degrees, anti-clockwise from east) = 0.0

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys

Data not available

Aperture details

RA, DEC (J2000) = 18h32m43.01s, 64d54m18.20s
semi major axis, semi minor axis (arcsec) = 4.27, 3.44
angle (degrees, anti-clockwise from east) = -2.44

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
GALEX_FUV	3.49	1.5	22.544	0.466	AB
SDSS_u	5.88	2.94	21.976	0.543	AB
SDSS_g	67.25	2.33	19.331	0.038	AB
PanSTARRS_g	83.25	0.86	19.099	0.011	AB
SDSS_r	204.96	3.96	18.121	0.021	AB
PanSTARRS_r	210.82	1.17	18.090	0.006	AB
SDSS_i	314.48	5.22	17.656	0.018	AB
PanSTARRS_i	326.47	1.12	17.615	0.004	AB
PanSTARRS_z	415.26	2.7	17.354	0.007	AB
SDSS_z	441.16	9.9	17.289	0.024	AB
PanSTARRS_y	476.92	7.63	17.204	0.017	AB
2MASS_J	817.31	109.09	15.724	0.145	Vega
2MASS_H	765.66	158.76	15.322	0.225	Vega
2MASS_K	956.46	197.4	14.611	0.224	Vega
WISE_W1	326.85	13.1	14.915	0.043	Vega
WISE_W2	238.97	18.11	14.615	0.082	Vega
WISE_W3	73.38	18.18	14.062	0.269	Vega
WISE_W4	124.87	127.49	12.039	1.108	Vega

Imaging data

Spectral Energy Distribution

Host SED inference

Local parameter details

Documentation

Data not available

Global parameter details

Documentation

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\,	10.759	10.847	10.979
{\rm log}_{10}({\rm SFR})	-2.159	-0.519	0.295
{\rm log}_{10}({\rm sSFR})	-13.034	-11.338	-10.473
{\rm stellar\ age}	6.187	7.115	10.771

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-1.105	-0.839	-0.649
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.542	-0.691	0.094

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.279	0.416	0.567
\delta	-0.936	-0.792	-0.566
\tau_1/\tau_2	0.618	1.019	1.416
Q_{PAH}	0.556	1.365	2.711
U_{min}	3.098	9.215	16.887
{\rm log}_{10}(\gamma_e)\,	-3.144	-2.298	-1.147

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-4.025	-2.664	-1.653
{\rm log}_{10}(\tau_{AGN})\,	0.977	1.357	1.817

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-2.491	-0.510	0.140
0.03-0.10 Gyr	-3.459	-0.636	0.368
0.10-0.32 Gyr	-3.701	-0.593	0.463
0.32-1.02 Gyr	-3.783	-0.584	0.433
1.02-3.26 Gyr	-2.484	0.225	0.918
3.26-10.43 Gyr	-0.455	0.999	1.181
10.43-11.59 Gyr	0.241	1.195	2.148