2025achk

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Information

Transient

Name: AT2025achk
Right ascension: 23h58m56.72s
Declination: 4d55m07.21s
Discovery Date: Oct. 18, 2025, 3:33 p.m.
Classification: None
Redshift: None
MW E(B-V): 0.038

Host

Name:
Right ascension: 23h58m56.64s
Declination: 4d55m08.16s
Redshift: None
Photometric Redshift: 0.173
 

Processing Status: blocked

Task Name Status Time taken (s) Warning Flag
Cutout download processed 18.7
Transient MWEBV processed 0.07
Host match processed 5.73
Host information processed 0.11
Host MWEBV processed 0.06
Global aperture construction processed 2.92
Global aperture photometry processed 6.1
Validate global photometry processed 18.25
Global host SED inference processed 410.7
Local aperture photometry processed 6.0
Validate local photometry no valid phot 0.03
Local host SED inference not processed None
 

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) = 23h58m56.72s, 4d55m07.21s
semi major axis, semi minor axis (arcsec) = 0.68, 0.68
angle (degrees, anti-clockwise from east) = 0.0

Filter Flux {\rm (\mu Jy)} Flux error {\rm (\mu Jy)} Mag Mag error Mag sys

Data not available


Aperture details

RA, DEC (J2000) = 23h58m56.62s, 4d55m08.21s
semi major axis, semi minor axis (arcsec) = 7.36, 3.07
angle (degrees, anti-clockwise from east) = -22.71

Filter Flux {\rm (\mu Jy)} Flux error {\rm (\mu Jy)} Mag Mag error Mag sys
GALEX_FUV 4.07 1.28 22.376 0.340 AB
GALEX_NUV 4.05 1.3 22.380 0.348 AB
SDSS_u 6.47 3.57 21.873 0.599 AB
SDSS_g 19.68 1.78 20.665 0.098 AB
DES_g 20.19 0.28 20.637 0.015 AB
PanSTARRS_g 26.38 1.32 20.347 0.054 AB
SDSS_r 46.93 2.93 19.721 0.068 AB
PanSTARRS_r 53.63 0.99 19.576 0.020 AB
DES_r 52.33 0.74 19.603 0.015 AB
SDSS_i 85.26 4.43 19.073 0.056 AB
PanSTARRS_i 85.05 1.17 19.076 0.015 AB
PanSTARRS_z 105.62 3.38 18.841 0.035 AB
SDSS_z 89.37 15.45 19.022 0.188 AB
DES_z 106.19 1.86 18.835 0.019 AB
PanSTARRS_y 119.51 7.38 18.707 0.067 AB
2MASS_J 247.09 118.64 17.023 0.521 Vega
2MASS_H 340.56 180.57 16.202 0.576 Vega
2MASS_K 297.3 206.58 15.879 0.754 Vega
WISE_W1 107.53 11.81 16.122 0.119 Vega
WISE_W2 53.08 15.71 16.249 0.321 Vega
WISE_W3 152.37 81.76 13.269 0.583 Vega
WISE_W4 301.24 514.34 11.083 1.854 Vega
 

Imaging data

Click the image to load the interactive plot.


 

Spectral Energy Distribution

 

Host SED inference


Local parameter details

Documentation

Data not available


Global parameter details

Documentation

Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\, 10.313 10.381 10.462
{\rm log}_{10}({\rm SFR}) -0.210 0.058 0.366
{\rm log}_{10}({\rm sSFR}) -10.612 -10.331 -10.006
{\rm stellar\ age} 6.700 7.607 10.309

Metallicity parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot}) -0.699 -0.379 -0.107
{\rm log}_{10}(Z_{gas}/Z_{\odot})\, -1.738 -0.267 0.226

Dust parameters
Parameter Lower (16%) Median (50%) Upper (84%)
\tau_2 0.430 0.644 0.895
\delta -0.064 0.132 0.269
\tau_1/\tau_2 0.656 1.019 1.400
Q_{PAH} 0.657 2.117 4.336
U_{min} 3.195 8.631 15.893
{\rm log}_{10}(\gamma_e)\, -2.772 -1.666 -0.600

AGN parameters
Parameter Lower (16%) Median (50%) Upper (84%)
{\rm log}_{10}(f_{AGN})\, -4.385 -3.274 -2.019
{\rm log}_{10}(\tau_{AGN})\, 0.989 1.541 1.916

Binned star formation history
Lookback time Lower (16%) Median (50%) Upper (84%)
0.00-0.03 Gyr 0.117 0.343 0.569
0.03-0.10 Gyr -0.927 -0.174 0.293
0.10-0.32 Gyr -1.353 -0.485 -0.002
0.32-1.02 Gyr -1.515 -0.554 -0.056
1.02-3.27 Gyr -1.218 -0.250 0.255
3.27-10.44 Gyr -0.123 0.527 0.664
10.44-11.60 Gyr 0.383 0.942 1.570