2025xxi

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Information

Transient

Name: AT2025xxi
Right ascension: 21h16m01.36s
Declination: -58d38m03.67s
Discovery Date: Sept. 16, 2025, 2:56 a.m.
Classification: None
Redshift: None
MW E(B-V): 0.028

Host

Name:
Right ascension: 21h16m01.69s
Declination: -58d38m07.12s
Redshift: None
Photometric Redshift: 0.017
 

Processing Status

Cutout download
 Cutout download
processed
 status
Transient information
Transient information
processed
 status
Transient MWEBV
Transient MWEBV
processed
 status
Host match
 Host match
processed
 status
Host information
Host information
processed
 status
Local aperture photometry
 Local aperture photometry
processed
 status
Validate local photometry
 Validate local photometry
processed
 status
Local host SED inference
Local host SED inference
processed
 status
Host MWEBV
Host MWEBV
processed
 status
Global host SED inference
Global host SED inference
processed
 status
Validate global photometry
Validate global photometr...
processed
 status
Global aperture construction
 Global aperture construct...
processed
 status
Global aperture photometry
 Global aperture photometr...
processed
 status
Task Name Status Time taken (s) Warning Flag
Host match processed 7.81
Cutout download processed 3.38
Global aperture construction processed 0.27
Local aperture photometry processed 0.99
Global aperture photometry processed 0.71
Validate local photometry processed 0.02
Validate global photometry processed 1.0
Host information processed 0.11
Global host SED inference processed 504.83
Local host SED inference processed 684.58
Transient information processed 0.0
Transient MWEBV processed 0.04
Host MWEBV processed 0.04
Processing status completed 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) = 21h16m01.36s, -58d38m03.67s
semi major axis, semi minor axis (arcsec) = 5.82, 5.82
angle (degrees, anti-clockwise from east) = 0.0

Filter Flux {\rm (\mu Jy)} Flux error {\rm (\mu Jy)} Mag Mag error Mag sys
GALEX_FUV 69.96 5.82 19.288 0.090 AB
GALEX_NUV 103.86 4.02 18.859 0.042 AB
2MASS_J 980.51 166.17 15.526 0.184 Vega
2MASS_H 1139.54 257.86 14.891 0.246 Vega
2MASS_K 862.55 268.69 14.723 0.338 Vega

Aperture details

RA, DEC (J2000) = 21h16m01.73s, -58d38m07.07s
semi major axis, semi minor axis (arcsec) = 21.54, 8.95
angle (degrees, anti-clockwise from east) = -55.97

Filter Flux {\rm (\mu Jy)} Flux error {\rm (\mu Jy)} Mag Mag error Mag sys
GALEX_FUV 193.02 9.67 18.186 0.054 AB
GALEX_NUV 276.91 6.73 17.794 0.026 AB
2MASS_J 1858.49 397.0 14.832 0.232 Vega
2MASS_H 2781.06 615.35 13.922 0.240 Vega
2MASS_K 1984.28 642.61 13.818 0.352 Vega
WISE_W1 1089.95 26.39 13.607 0.026 Vega
WISE_W2 680.8 31.91 13.478 0.051 Vega
WISE_W3 2375.68 137.98 10.287 0.063 Vega
WISE_W4 1089.2 718.72 9.687 0.716 Vega
 

Imaging data

 

Spectral Energy Distribution

 
 
 
 

Host SED inference


Local parameter details

Documentation

Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\, 8.193 8.651 8.959
{\rm log}_{10}({\rm SFR}) -0.896 -0.414 0.035
{\rm log}_{10}({\rm sSFR}) -9.661 -9.127 -8.301
{\rm stellar\ age} 0.690 5.533 8.169

Metallicity parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot}) -1.527 -0.701 0.002
{\rm log}_{10}(Z_{gas}/Z_{\odot})\, -1.692 -0.821 -0.180

Dust parameters
Parameter Lower (16%) Median (50%) Upper (84%)
\tau_2 0.252 0.662 1.134
\delta -0.376 0.065 0.268
\tau_1/\tau_2 0.579 1.003 1.495
Q_{PAH} 0.249 1.129 3.474
U_{min} 2.905 8.643 16.258
{\rm log}_{10}(\gamma_e)\, -3.528 -2.548 -1.247

AGN parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(f_{AGN})\, -4.358 -2.936 -0.481
{\rm log}_{10}(\tau_{AGN})\, 1.020 1.509 1.990

Binned star formation history
Lookback time Lower (16%) Median (50%) Upper (84%)
0.00-0.03 Gyr -1.085 -0.531 -0.065
0.03-0.10 Gyr -1.451 -0.555 0.137
0.10-0.33 Gyr -2.676 -1.229 -0.487
0.33-1.10 Gyr -3.327 -1.471 -0.860
1.10-3.67 Gyr -4.082 -1.633 -1.024
3.67-12.18 Gyr -4.037 -1.565 -0.976
12.18-13.53 Gyr -3.884 -1.530 -0.628

Global parameter details

Documentation

Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\, 8.806 9.084 9.295
{\rm log}_{10}({\rm SFR}) -0.850 -0.555 -0.141
{\rm log}_{10}({\rm sSFR}) -10.055 -9.636 -9.038
{\rm stellar\ age} 4.419 7.460 9.832

Metallicity parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot}) -1.083 -0.468 -0.040
{\rm log}_{10}(Z_{gas}/Z_{\odot})\, -1.716 -0.777 -0.085

Dust parameters
Parameter Lower (16%) Median (50%) Upper (84%)
\tau_2 0.111 0.227 0.406
\delta -0.620 -0.176 0.214
\tau_1/\tau_2 0.285 0.668 1.115
Q_{PAH} 0.202 0.721 2.098
U_{min} 2.486 7.038 13.582
{\rm log}_{10}(\gamma_e)\, -3.641 -2.984 -1.869

AGN parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(f_{AGN})\, -4.300 -3.290 -2.205
{\rm log}_{10}(\tau_{AGN})\, 0.950 1.407 1.878

Binned star formation history
Lookback time Lower (16%) Median (50%) Upper (84%)
0.00-0.03 Gyr -1.008 -0.506 -0.253
0.03-0.10 Gyr -1.467 -0.626 -0.038
0.10-0.33 Gyr -2.379 -1.084 -0.435
0.33-1.10 Gyr -2.831 -1.352 -0.744
1.10-3.67 Gyr -2.376 -1.196 -0.801
3.67-12.18 Gyr -1.796 -0.960 -0.628
12.18-13.53 Gyr -1.657 -0.768 0.041