2025ych

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Information

Transient

Name: AT2025ych
Right ascension: 3h24m14.51s
Declination: -27d19m59.40s
Discovery Date: Aug. 31, 2025, 2:33 p.m.
Classification: None
Redshift: None
MW E(B-V): 0.016

Host

Name:
Right ascension: 3h24m15.07s
Declination: -27d19m56.75s
Redshift: None
Photometric Redshift: 0.074
 

Processing Status: completed

Task Name Status Time taken (s) Warning Flag
Cutout download processed 6.12
Transient MWEBV processed 0.09
Host match processed 6.49
Host information processed 0.11
Host MWEBV processed 0.04
Global aperture construction processed 0.67
Global aperture photometry processed 5.92
Validate global photometry processed 14.5
Global host SED inference processed 401.39
Local aperture photometry processed 5.73
Validate local photometry processed 0.02
Local host SED inference processed 407.66
 

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) = 3h24m14.51s, -27d19m59.40s
semi major axis, semi minor axis (arcsec) = 1.42, 1.42
angle (degrees, anti-clockwise from east) = 0.0

Filter Flux {\rm (\mu Jy)} Flux error {\rm (\mu Jy)} Mag Mag error Mag sys
DES_g 2.54 0.08 22.888 0.033 AB
PanSTARRS_g 3.97 0.4 22.404 0.109 AB
PanSTARRS_r 6.0 0.49 21.955 0.088 AB
DES_r 4.81 0.11 22.194 0.025 AB
PanSTARRS_i 7.0 0.5 21.787 0.077 AB
PanSTARRS_z 7.12 1.04 21.768 0.158 AB
DES_z 6.98 0.39 21.790 0.061 AB
PanSTARRS_y 14.14 3.03 21.024 0.232 AB

Aperture details

RA, DEC (J2000) = 3h24m15.05s, -27d19m56.61s
semi major axis, semi minor axis (arcsec) = 10.6, 9.21
angle (degrees, anti-clockwise from east) = -25.56

Filter Flux {\rm (\mu Jy)} Flux error {\rm (\mu Jy)} Mag Mag error Mag sys
GALEX_FUV 54.81 5.56 19.553 0.110 AB
GALEX_NUV 69.83 3.82 19.290 0.059 AB
DES_g 731.08 0.91 16.740 0.001 AB
PanSTARRS_g 747.85 2.82 16.715 0.004 AB
PanSTARRS_r 1243.21 3.47 16.164 0.003 AB
DES_r 1380.22 1.37 16.050 0.001 AB
PanSTARRS_i 1638.95 3.53 15.864 0.002 AB
PanSTARRS_z 1929.9 7.28 15.686 0.004 AB
DES_z 2172.98 5.37 15.557 0.003 AB
PanSTARRS_y 2336.44 21.09 15.479 0.010 AB
2MASS_J 2931.49 233.94 14.337 0.087 Vega
2MASS_H 3110.96 374.69 13.800 0.131 Vega
2MASS_K 3003.11 490.6 13.368 0.177 Vega
WISE_W1 1434.03 19.62 13.310 0.015 Vega
WISE_W2 878.82 21.79 13.201 0.027 Vega
WISE_W3 1744.88 64.39 10.622 0.040 Vega
WISE_W4 1545.36 420.77 9.307 0.296 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})\, 7.981 8.172 8.323
{\rm log}_{10}({\rm SFR}) -2.079 -1.586 -1.069
{\rm log}_{10}({\rm sSFR}) -10.313 -9.809 -9.168
{\rm stellar\ age} 3.144 5.964 7.335

Metallicity parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot}) -1.446 -0.876 -0.383
{\rm log}_{10}(Z_{gas}/Z_{\odot})\, -1.298 -0.735 -0.138

Dust parameters
Parameter Lower (16%) Median (50%) Upper (84%)
\tau_2 0.550 0.956 1.431
\delta -0.235 0.064 0.264
\tau_1/\tau_2 0.567 0.904 1.217
Q_{PAH} 1.040 2.684 4.933
U_{min} 2.762 7.568 14.670
{\rm log}_{10}(\gamma_e)\, -2.817 -1.877 -0.971

AGN parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(f_{AGN})\, -1.639 -0.236 0.203
{\rm log}_{10}(\tau_{AGN})\, 1.039 1.423 1.771

Binned star formation history
Lookback time Lower (16%) Median (50%) Upper (84%)
0.00-0.03 Gyr -1.984 -1.505 -1.028
0.03-0.10 Gyr -2.333 -1.697 -1.092
0.10-0.33 Gyr -2.266 -1.684 -1.144
0.33-1.07 Gyr -2.278 -1.720 -1.348
1.07-3.51 Gyr -2.358 -1.740 -1.480
3.51-11.50 Gyr -2.516 -1.790 -1.539
11.50-12.77 Gyr -2.804 -1.854 -1.332

Global parameter details

Documentation

Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\, 10.603 10.642 10.682
{\rm log}_{10}({\rm SFR}) -0.229 -0.033 0.172
{\rm log}_{10}({\rm sSFR}) -10.900 -10.679 -10.457
{\rm stellar\ age} 6.485 7.187 8.124

Metallicity parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot}) -0.342 -0.229 -0.148
{\rm log}_{10}(Z_{gas}/Z_{\odot})\, -0.026 0.278 0.416

Dust parameters
Parameter Lower (16%) Median (50%) Upper (84%)
\tau_2 0.049 0.080 0.123
\delta -0.823 -0.504 -0.107
\tau_1/\tau_2 0.736 1.104 1.459
Q_{PAH} 1.543 3.714 5.452
U_{min} 2.251 6.964 13.491
{\rm log}_{10}(\gamma_e)\, -2.244 -1.278 -0.496

AGN parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(f_{AGN})\, -4.328 -3.246 -2.203
{\rm log}_{10}(\tau_{AGN})\, 1.151 1.608 1.949

Binned star formation history
Lookback time Lower (16%) Median (50%) Upper (84%)
0.00-0.03 Gyr -0.292 -0.076 0.074
0.03-0.10 Gyr -0.325 -0.017 0.263
0.10-0.33 Gyr -0.030 0.247 0.482
0.33-1.07 Gyr 0.109 0.358 0.537
1.07-3.51 Gyr 0.323 0.598 0.798
3.51-11.50 Gyr 0.659 0.795 0.880
11.50-12.77 Gyr 0.383 0.839 1.255