2025ydd

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Information

Transient

Name: AT2025ydd
Right ascension: 17h14m54.83s
Declination: 35d30m57.34s
Discovery Date: Sept. 20, 2025, 3:21 a.m.
Classification: None
Redshift: None
MW E(B-V): 0.026

Host

Name:
Right ascension: 17h14m55.01s
Declination: 35d31m13.67s
Redshift: 0.037358
Photometric Redshift:
 

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 4.81
Cutout download processed 17.4
Global aperture construction processed 0.65
Local aperture photometry processed 6.47
Global aperture photometry processed 6.46
Validate local photometry processed 0.02
Validate global photometry processed 18.37
Host information processed 0.13
Global host SED inference processed 443.47
Local host SED inference processed 564.14
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) = 17h14m54.83s, 35d30m57.34s
semi major axis, semi minor axis (arcsec) = 2.7, 2.7
angle (degrees, anti-clockwise from east) = 0.0

Filter Flux {\rm (\mu Jy)} Flux error {\rm (\mu Jy)} Mag Mag error Mag sys
SDSS_u 5.63 2.08 22.024 0.401 AB
SDSS_g 21.3 1.42 20.579 0.072 AB
DES_g 21.04 0.3 20.592 0.016 AB
PanSTARRS_g 19.27 0.52 20.688 0.029 AB
SDSS_r 28.61 1.79 20.259 0.068 AB
PanSTARRS_r 30.57 0.8 20.187 0.029 AB
SDSS_i 37.74 2.51 19.958 0.072 AB
PanSTARRS_i 30.48 0.5 20.190 0.018 AB
PanSTARRS_z 41.43 2.01 19.857 0.053 AB
SDSS_z 43.86 7.06 19.795 0.175 AB
DES_z 26.66 0.97 20.335 0.039 AB
PanSTARRS_y 39.06 4.24 19.921 0.118 AB

Aperture details

RA, DEC (J2000) = 17h14m55.08s, 35d31m13.20s
semi major axis, semi minor axis (arcsec) = 28.62, 20.3
angle (degrees, anti-clockwise from east) = -49.58

Filter Flux {\rm (\mu Jy)} Flux error {\rm (\mu Jy)} Mag Mag error Mag sys
GALEX_FUV 450.59 17.41 17.266 0.042 AB
GALEX_NUV 722.44 12.9 16.753 0.019 AB
SDSS_g 4943.71 19.58 14.665 0.004 AB
PanSTARRS_g 5110.29 4.74 14.629 0.001 AB
SDSS_r 7437.12 24.72 14.221 0.004 AB
PanSTARRS_r 8163.41 7.33 14.120 0.001 AB
SDSS_i 9756.96 31.1 13.927 0.003 AB
PanSTARRS_i 9588.38 4.54 13.946 0.001 AB
SDSS_z 11289.14 67.0 13.768 0.006 AB
DES_z 10536.82 15.33 13.843 0.002 AB
2MASS_J 15454.33 527.66 12.532 0.037 Vega
2MASS_H 17048.27 916.18 11.953 0.058 Vega
2MASS_K 14795.55 929.3 11.637 0.068 Vega
WISE_W1 9210.67 60.84 11.290 0.007 Vega
WISE_W2 6345.72 61.55 11.055 0.011 Vega
WISE_W3 44656.21 263.18 7.101 0.006 Vega
WISE_W4 71126.14 4404.81 5.150 0.067 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})\, 7.862 8.080 8.206
{\rm log}_{10}({\rm SFR}) -2.235 -1.659 -1.126
{\rm log}_{10}({\rm sSFR}) -10.410 -9.694 -9.088
{\rm stellar\ age} 3.278 6.047 7.494

Metallicity parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot}) -1.725 -1.266 -0.631
{\rm log}_{10}(Z_{gas}/Z_{\odot})\, -1.877 -1.573 -0.253

Dust parameters
Parameter Lower (16%) Median (50%) Upper (84%)
\tau_2 0.091 0.281 0.597
\delta -0.702 -0.296 0.140
\tau_1/\tau_2 0.768 1.145 1.494
Q_{PAH} 1.219 3.099 5.453
U_{min} 3.072 8.163 15.448
{\rm log}_{10}(\gamma_e)\, -2.809 -1.463 -0.511

AGN parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(f_{AGN})\, -1.558 -0.435 -0.008
{\rm log}_{10}(\tau_{AGN})\, 1.156 1.581 1.978

Binned star formation history
Lookback time Lower (16%) Median (50%) Upper (84%)
0.00-0.03 Gyr -2.607 -1.951 -1.544
0.03-0.10 Gyr -2.349 -1.589 -1.007
0.10-0.33 Gyr -2.202 -1.585 -1.085
0.33-1.09 Gyr -2.515 -1.822 -1.452
1.09-3.61 Gyr -2.458 -1.868 -1.611
3.61-11.93 Gyr -2.662 -1.929 -1.678
11.93-13.26 Gyr -2.873 -1.970 -1.452

Global parameter details

Documentation

Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\, 10.342 10.534 10.715
{\rm log}_{10}({\rm SFR}) 0.405 0.926 1.254
{\rm log}_{10}({\rm sSFR}) -10.204 -9.613 -9.185
{\rm stellar\ age} 2.114 4.814 6.814

Metallicity parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot}) -1.262 -0.745 -0.397
{\rm log}_{10}(Z_{gas}/Z_{\odot})\, -1.879 -1.385 0.279

Dust parameters
Parameter Lower (16%) Median (50%) Upper (84%)
\tau_2 0.473 0.654 0.854
\delta -0.132 0.015 0.192
\tau_1/\tau_2 0.602 0.956 1.303
Q_{PAH} 0.868 1.594 2.935
U_{min} 2.733 7.443 14.419
{\rm log}_{10}(\gamma_e)\, -3.473 -2.435 -1.799

AGN parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(f_{AGN})\, -2.583 -1.937 -1.484
{\rm log}_{10}(\tau_{AGN})\, 1.008 1.472 1.866

Binned star formation history
Lookback time Lower (16%) Median (50%) Upper (84%)
0.00-0.03 Gyr 0.050 0.814 1.136
0.03-0.10 Gyr 0.040 0.923 1.343
0.10-0.33 Gyr 0.588 1.155 1.608
0.33-1.09 Gyr 0.150 0.857 1.180
1.09-3.61 Gyr -0.008 0.688 1.045
3.61-11.93 Gyr -0.869 0.340 0.754
11.93-13.26 Gyr -1.055 0.313 0.945