2025knk

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Information

Transient

Name: AT2025knk
Right ascension: 21h53m53.30s
Declination: -22d11m54.19s
Discovery Date: May 16, 2025, 1:37 a.m.
Classification: None
Redshift: None
MW E(B-V): 0.028

Host

Name: 2025knk
Right ascension: 21h53m53.52s
Declination: -22d11m53.52s
Redshift: 0.070542
Photometric Redshift: 0.060

Processing Status: completed

Task Name	Status	Time taken (s)
Cutout download	processed	4.21
Transient MWEBV	processed	0.06
Host match	processed	2.08
Host information	processed	0.12
Host MWEBV	processed	0.06
Global aperture construction	processed	0.64
Global aperture photometry	processed	4.52
Validate global photometry	processed	12.07
Global host SED inference	processed	390.56
Local aperture photometry	processed	4.3
Validate local photometry	processed	0.02
Local host SED inference	processed	452.2

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) = 21h53m53.30s, -22d11m54.19s
semi major axis, semi minor axis (arcsec) = 1.49, 1.49
angle (degrees, anti-clockwise from east) = 0.0

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
PanSTARRS_g	49.69	0.39	19.659	0.008	AB
PanSTARRS_r	101.81	0.58	18.881	0.006	AB
PanSTARRS_i	147.78	0.46	18.476	0.003	AB
PanSTARRS_z	181.99	1.35	18.250	0.008	AB
PanSTARRS_y	213.05	3.21	18.079	0.016	AB

Aperture details

RA, DEC (J2000) = 21h53m53.50s, -22d11m53.51s
semi major axis, semi minor axis (arcsec) = 15.73, 12.34
angle (degrees, anti-clockwise from east) = -147.03

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
GALEX_FUV	46.15	4.09	19.740	0.096	AB
GALEX_NUV	63.91	3.54	19.386	0.060	AB
PanSTARRS_g	1270.55	3.46	16.140	0.003	AB
PanSTARRS_r	2402.32	5.12	15.448	0.002	AB
PanSTARRS_i	3404.81	4.07	15.070	0.001	AB
PanSTARRS_z	4166.79	12.29	14.850	0.003	AB
PanSTARRS_y	4779.53	29.89	14.702	0.007	AB
2MASS_J	6011.36	299.79	13.558	0.054	Vega
2MASS_H	7512.86	485.21	12.843	0.070	Vega
2MASS_K	7080.44	557.13	12.437	0.085	Vega
WISE_W1	3272.59	41.27	12.414	0.014	Vega
WISE_W2	1916.55	44.04	12.355	0.025	Vega
WISE_W3	2497.61	197.29	10.232	0.086	Vega
WISE_W4	3504.31	1171.65	8.418	0.363	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})\,	9.689	9.802	9.924
{\rm log}_{10}({\rm SFR})	-2.377	-1.371	-0.714
{\rm log}_{10}({\rm sSFR})	-12.133	-11.158	-10.533
{\rm stellar\ age}	7.383	8.704	12.037

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-1.448	-0.945	-0.556
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.662	-0.669	0.214

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.339	0.690	1.044
\delta	-0.486	-0.059	0.256
\tau_1/\tau_2	0.579	0.983	1.362
Q_{PAH}	0.786	2.415	5.268
U_{min}	2.899	8.222	15.783
{\rm log}_{10}(\gamma_e)\,	-3.220	-2.130	-0.814

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-2.616	-0.879	-0.260
{\rm log}_{10}(\tau_{AGN})\,	1.015	1.422	1.879

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-2.742	-1.537	-0.959
0.03-0.10 Gyr	-2.895	-1.408	-0.631
0.10-0.33 Gyr	-3.537	-1.507	-0.704
0.33-1.07 Gyr	-4.153	-1.663	-0.789
1.07-3.52 Gyr	-3.705	-1.428	-0.389
3.52-11.54 Gyr	-1.568	-0.175	0.045
11.54-12.82 Gyr	-0.372	0.406	1.018

Global parameter details

Documentation

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\,	11.008	11.048	11.109
{\rm log}_{10}({\rm SFR})	-0.231	0.073	0.362
{\rm log}_{10}({\rm sSFR})	-11.247	-10.973	-10.709
{\rm stellar\ age}	7.518	8.243	10.511

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-0.693	-0.502	-0.354
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.687	-0.459	0.265

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.146	0.241	0.383
\delta	-0.271	0.011	0.243
\tau_1/\tau_2	0.589	0.960	1.387
Q_{PAH}	0.637	1.672	3.153
U_{min}	2.308	7.170	14.323
{\rm log}_{10}(\gamma_e)\,	-2.988	-1.858	-1.039

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-4.300	-3.301	-2.360
{\rm log}_{10}(\tau_{AGN})\,	1.067	1.551	1.936

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-0.694	-0.084	0.172
0.03-0.10 Gyr	-0.411	0.115	0.472
0.10-0.33 Gyr	-0.479	0.067	0.423
0.33-1.07 Gyr	-0.674	-0.034	0.335
1.07-3.52 Gyr	-0.559	0.263	0.750
3.52-11.54 Gyr	0.857	1.237	1.321
11.54-12.82 Gyr	0.940	1.483	2.074