2025alrn

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Information

Transient

Name: AT2025alrn
Right ascension: 13h54m25.46s
Declination: 8d23m47.00s
Discovery Date: Dec. 17, 2025, 1:26 p.m.
Classification: None
Redshift: None
MW E(B-V): 0.025

Host

Name: 49423
Right ascension: 13h54m26.71s
Declination: 8d23m38.18s
Redshift: 0.023470
Photometric Redshift:
 

Processing Status: completed

Task Name Status Time taken (s) Warning Flag
Cutout download processed 19.19
Transient MWEBV processed 0.06
Host match processed 3.74
Host information processed 0.07
Host MWEBV processed 0.04
Global aperture construction processed 0.61
Global aperture photometry processed 6.35
Validate global photometry processed 18.12
Global host SED inference processed 428.85
Local aperture photometry processed 5.86
Validate local photometry processed 0.03
Local host SED inference processed 578.74
 

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) = 13h54m25.46s, 8d23m47.00s
semi major axis, semi minor axis (arcsec) = 4.22, 4.22
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 3.1 1.73 22.673 0.605 AB
SDSS_u 10.14 4.17 21.385 0.447 AB
SDSS_g 13.55 1.78 21.070 0.142 AB
DES_g 37.58 0.43 19.963 0.013 AB
PanSTARRS_g 28.26 0.94 20.272 0.036 AB
SDSS_r 54.68 2.92 19.555 0.058 AB
PanSTARRS_r 67.26 1.36 19.331 0.022 AB
DES_r 81.65 0.85 19.120 0.011 AB
SDSS_i 89.92 4.34 19.015 0.052 AB
PanSTARRS_i 112.69 1.48 18.770 0.014 AB
PanSTARRS_z 155.81 2.67 18.419 0.019 AB
SDSS_z 144.91 12.5 18.497 0.094 AB
DES_z 166.46 2.59 18.347 0.017 AB
PanSTARRS_y 143.08 6.91 18.511 0.052 AB
2MASS_J 143.75 132.34 17.611 1.000 Vega
2MASS_H -31.17 209.22 Vega
2MASS_K 273.24 227.02 15.971 0.902 Vega

Aperture details

RA, DEC (J2000) = 13h54m26.75s, 8d23m37.95s
semi major axis, semi minor axis (arcsec) = 28.86, 6.52
angle (degrees, anti-clockwise from east) = -31.45

Filter Flux {\rm (\mu Jy)} Flux error {\rm (\mu Jy)} Mag Mag error Mag sys
GALEX_FUV 121.63 10.81 18.687 0.097 AB
GALEX_NUV 130.14 1.85 18.614 0.015 AB
SDSS_u 504.08 14.3 17.144 0.031 AB
SDSS_g 1247.84 10.2 16.160 0.009 AB
DES_g 936.21 1.81 16.472 0.002 AB
PanSTARRS_g 1208.09 3.17 16.195 0.003 AB
SDSS_r 2275.43 14.17 15.507 0.007 AB
PanSTARRS_r 2187.62 4.68 15.550 0.002 AB
DES_r 1878.58 3.59 15.715 0.002 AB
SDSS_i 3237.37 18.58 15.125 0.006 AB
PanSTARRS_i 3271.24 4.88 15.113 0.002 AB
PanSTARRS_z 4042.61 8.56 14.883 0.002 AB
SDSS_z 4835.15 42.74 14.689 0.010 AB
PanSTARRS_y 5460.82 22.52 14.557 0.004 AB
2MASS_J 6556.09 447.45 13.463 0.074 Vega
2MASS_H 9771.45 704.88 12.558 0.078 Vega
2MASS_K 9753.39 766.82 12.089 0.085 Vega
WISE_W1 6265.94 45.22 11.709 0.008 Vega
WISE_W2 4324.91 54.81 11.471 0.014 Vega
WISE_W3 17798.48 165.34 8.100 0.010 Vega
WISE_W4 18605.31 1110.85 6.606 0.065 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})\, 8.740 8.861 8.998
{\rm log}_{10}({\rm SFR}) -2.376 -1.719 -1.230
{\rm log}_{10}({\rm sSFR}) -11.272 -10.562 -10.035
{\rm stellar\ age} 7.308 9.011 12.595

Metallicity parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot}) -1.347 -0.797 -0.397
{\rm log}_{10}(Z_{gas}/Z_{\odot})\, -1.892 -1.645 -1.131

Dust parameters
Parameter Lower (16%) Median (50%) Upper (84%)
\tau_2 0.754 1.281 1.735
\delta -0.185 0.055 0.266
\tau_1/\tau_2 0.509 0.870 1.256
Q_{PAH} 0.561 2.635 5.287
U_{min} 3.099 8.990 16.713
{\rm log}_{10}(\gamma_e)\, -3.330 -2.145 -0.727

AGN parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(f_{AGN})\, -3.532 -1.034 -0.179
{\rm log}_{10}(\tau_{AGN})\, 1.089 1.407 1.947

Binned star formation history
Lookback time Lower (16%) Median (50%) Upper (84%)
0.00-0.03 Gyr -2.818 -1.878 -1.327
0.03-0.10 Gyr -2.738 -1.761 -1.165
0.10-0.33 Gyr -3.676 -2.122 -1.373
0.33-1.10 Gyr -4.603 -2.346 -1.426
1.10-3.65 Gyr -4.623 -2.209 -1.204
3.65-12.10 Gyr -2.690 -1.182 -0.907
12.10-13.44 Gyr -1.390 -0.546 0.049

Global parameter details

Documentation

Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\, 10.186 10.258 10.341
{\rm log}_{10}({\rm SFR}) 0.359 0.622 0.945
{\rm log}_{10}({\rm sSFR}) -9.926 -9.631 -9.266
{\rm stellar\ age} 7.598 8.832 12.129

Metallicity parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot}) -0.414 -0.223 -0.067
{\rm log}_{10}(Z_{gas}/Z_{\odot})\, 0.118 0.322 0.435

Dust parameters
Parameter Lower (16%) Median (50%) Upper (84%)
\tau_2 0.928 1.121 1.303
\delta 0.142 0.220 0.319
\tau_1/\tau_2 0.428 0.825 1.222
Q_{PAH} 0.767 1.420 2.449
U_{min} 2.255 7.141 14.490
{\rm log}_{10}(\gamma_e)\, -3.606 -2.698 -1.940

AGN parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(f_{AGN})\, -1.855 -1.685 -1.513
{\rm log}_{10}(\tau_{AGN})\, 0.876 1.150 1.463

Binned star formation history
Lookback time Lower (16%) Median (50%) Upper (84%)
0.00-0.03 Gyr -1.658 -0.459 0.003
0.03-0.10 Gyr 0.500 0.770 1.094
0.10-0.33 Gyr -2.821 -0.954 -0.104
0.33-1.10 Gyr -3.943 -1.282 -0.464
1.10-3.65 Gyr -2.827 -0.725 -0.049
3.65-12.10 Gyr -0.783 0.310 0.471
12.10-13.44 Gyr -0.235 0.807 1.409