2025ahsg

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Information

Transient

Name: AT2025ahsg
Right ascension: 4h59m55.91s
Declination: -25d59m42.38s
Discovery Date: Dec. 20, 2025, 7:02 a.m.
Classification: None
Redshift: None
MW E(B-V): 0.035

Host

Name:
Right ascension: 4h59m57.71s
Declination: -26d01m17.92s
Redshift: None
Photometric Redshift: 0.004
 

Processing Status: blocked

Task Name Status Time taken (s) Warning Flag
Cutout download processed 7.65
Transient MWEBV processed 0.13
Host match processed 7.81
Host information processed 0.15
Host MWEBV processed 0.04
Global aperture construction processed 9.93
Global aperture photometry processed 6.57
Validate global photometry processed 5.12
Global host SED inference processed 402.06
Local aperture photometry processed 5.31
Validate local photometry processed 0.03
Local host SED inference processed 392.46
 

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) = 4h59m55.91s, -25d59m42.38s
semi major axis, semi minor axis (arcsec) = 25.55, 25.55
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 217.37 5.8 18.057 0.029 AB
GALEX_NUV 240.73 5.83 17.946 0.026 AB
DES_g 1834.52 4.86 15.741 0.003 AB
PanSTARRS_g 1574.72 8.7 15.907 0.006 AB
PanSTARRS_r 2026.53 15.33 15.633 0.008 AB
DES_r 2578.08 6.64 15.372 0.003 AB
PanSTARRS_i 2601.69 11.45 15.362 0.005 AB
PanSTARRS_z 2459.98 32.49 15.423 0.014 AB
DES_z 3320.54 11.35 15.097 0.004 AB
PanSTARRS_y 2545.65 50.06 15.386 0.021 AB
2MASS_J 3291.01 573.02 14.212 0.189 Vega
2MASS_H 1635.01 909.15 14.499 0.604 Vega
2MASS_K 488.94 1183.42 15.339 2.628 Vega
WISE_W1 1445.75 131.9 13.301 0.099 Vega
WISE_W2 598.19 100.75 13.619 0.183 Vega
WISE_W3 1618.96 248.53 10.703 0.167 Vega
WISE_W4 1848.25 988.32 9.113 0.581 Vega

Aperture details

RA, DEC (J2000) = 4h59m57.74s, -26d01m19.92s
semi major axis, semi minor axis (arcsec) = 8.41, 6.14
angle (degrees, anti-clockwise from east) = 161.45

Filter Flux {\rm (\mu Jy)} Flux error {\rm (\mu Jy)} Mag Mag error Mag sys
GALEX_FUV 71.42 3.07 19.265 0.047 AB
GALEX_NUV 115.58 3.86 18.743 0.036 AB
DES_r 2179.57 7.99 15.554 0.004 AB
WISE_W1 983.73 117.7 13.719 0.130 Vega
WISE_W2 579.04 85.81 13.654 0.161 Vega
WISE_W3 1372.38 195.47 10.882 0.155 Vega
WISE_W4 2294.48 820.76 8.878 0.388 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})\, 8.011 8.116 8.193
{\rm log}_{10}({\rm SFR}) -2.239 -2.025 -1.786
{\rm log}_{10}({\rm sSFR}) -10.388 -10.136 -9.875
{\rm stellar\ age} 5.755 7.084 8.124

Metallicity parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot}) -1.600 -1.307 -0.977
{\rm log}_{10}(Z_{gas}/Z_{\odot})\, -1.297 -1.171 -1.029

Dust parameters
Parameter Lower (16%) Median (50%) Upper (84%)
\tau_2 0.161 0.284 0.428
\delta -0.188 0.036 0.251
\tau_1/\tau_2 0.601 0.890 1.164
Q_{PAH} 0.419 1.091 2.182
U_{min} 3.062 7.982 14.504
{\rm log}_{10}(\gamma_e)\, -2.899 -2.136 -1.330

AGN parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(f_{AGN})\, -4.427 -3.168 -1.980
{\rm log}_{10}(\tau_{AGN})\, 0.987 1.474 1.927

Binned star formation history
Lookback time Lower (16%) Median (50%) Upper (84%)
0.00-0.03 Gyr -2.090 -1.960 -1.820
0.03-0.10 Gyr -2.375 -2.047 -1.749
0.10-0.33 Gyr -2.473 -2.088 -1.733
0.33-1.10 Gyr -2.426 -1.998 -1.688
1.10-3.66 Gyr -2.132 -1.842 -1.632
3.66-12.16 Gyr -2.037 -1.790 -1.641
12.16-13.51 Gyr -2.302 -1.801 -1.380

Global parameter details

Documentation

Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\, 7.988 8.128 8.235
{\rm log}_{10}({\rm SFR}) -2.925 -2.488 -2.143
{\rm log}_{10}({\rm sSFR}) -11.089 -10.642 -10.249
{\rm stellar\ age} 5.404 7.150 8.483

Metallicity parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot}) -1.484 -1.086 -0.648
{\rm log}_{10}(Z_{gas}/Z_{\odot})\, -1.519 -0.611 0.186

Dust parameters
Parameter Lower (16%) Median (50%) Upper (84%)
\tau_2 0.113 0.213 0.360
\delta -0.721 -0.374 0.001
\tau_1/\tau_2 0.570 0.926 1.263
Q_{PAH} 0.355 1.061 2.297
U_{min} 3.267 8.484 15.225
{\rm log}_{10}(\gamma_e)\, -2.337 -1.545 -0.802

AGN parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(f_{AGN})\, -4.339 -3.188 -1.840
{\rm log}_{10}(\tau_{AGN})\, 1.036 1.515 1.926

Binned star formation history
Lookback time Lower (16%) Median (50%) Upper (84%)
0.00-0.03 Gyr -3.149 -2.546 -2.189
0.03-0.10 Gyr -3.052 -2.502 -2.080
0.10-0.33 Gyr -2.678 -2.167 -1.753
0.33-1.10 Gyr -2.500 -1.931 -1.528
1.10-3.66 Gyr -2.297 -1.890 -1.654
3.66-12.16 Gyr -2.147 -1.786 -1.602
12.16-13.51 Gyr -2.394 -1.773 -1.276