2025ykw

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Information

Transient

Name: AT2025ykw
Right ascension: 9h06m04.89s
Declination: 17d02m35.09s
Discovery Date: Sept. 24, 2025, 12:23 p.m.
Classification: None
Redshift: None
MW E(B-V): 0.032

Host

Name: 86615
Right ascension: 9h06m04.08s
Declination: 17d02m22.21s
Redshift: 0.056248
Photometric Redshift:

Processing Status: completed

Task Name	Status	Time taken (s)
Cutout download	processed	16.58
Transient MWEBV	processed	0.08
Host match	processed	4.7
Host information	processed	0.04
Host MWEBV	processed	0.05
Global aperture construction	processed	0.63
Global aperture photometry	processed	6.57
Validate global photometry	processed	17.31
Global host SED inference	processed	1799.4
Local aperture photometry	processed	6.88
Validate local photometry	processed	0.02
Local host SED inference	processed	411.17

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) = 9h06m04.89s, 17d02m35.09s
semi major axis, semi minor axis (arcsec) = 1.83, 1.83
angle (degrees, anti-clockwise from east) = 0.0

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
SDSS_g	4.53	0.78	22.260	0.186	AB
DES_g	5.01	0.18	22.150	0.039	AB
PanSTARRS_g	5.73	0.32	22.005	0.061	AB
SDSS_r	6.61	1.04	21.850	0.170	AB
PanSTARRS_r	6.88	0.5	21.805	0.079	AB
DES_r	7.21	0.32	21.754	0.049	AB
SDSS_i	8.33	1.64	21.598	0.214	AB
PanSTARRS_i	11.49	0.7	21.249	0.066	AB
PanSTARRS_z	11.72	1.14	21.228	0.106	AB
SDSS_z	-10.12	5.85			AB
DES_z	10.38	0.85	21.360	0.089	AB
PanSTARRS_y	9.86	3.33	21.416	0.367	AB

Aperture details

RA, DEC (J2000) = 9h06m04.11s, 17d02m22.61s
semi major axis, semi minor axis (arcsec) = 37.03, 9.03
angle (degrees, anti-clockwise from east) = -120.36

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
GALEX_NUV	147.25	6.26	18.480	0.046	AB
DES_g	881.55	2.01	16.537	0.002	AB
SDSS_r	2373.98	14.93	15.461	0.007	AB
DES_r	1914.62	4.23	15.695	0.002	AB
PanSTARRS_i	3526.56	7.03	15.032	0.002	AB
PanSTARRS_z	4262.67	11.44	14.826	0.003	AB
2MASS_J	5854.89	424.27	13.586	0.079	Vega
2MASS_H	8974.81	708.83	12.650	0.086	Vega
2MASS_K	7265.74	590.51	12.409	0.088	Vega
WISE_W1	3610.11	52.45	12.307	0.016	Vega
WISE_W2	2127.82	58.81	12.241	0.030	Vega

Imaging data

Click the image to load the interactive plot.

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})\,	7.831	8.064	8.246
{\rm log}_{10}({\rm SFR})	-1.730	-1.218	-0.667
{\rm log}_{10}({\rm sSFR})	-9.874	-9.287	-8.549
{\rm stellar\ age}	1.911	5.817	7.366

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-1.590	-1.041	-0.438
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.508	-0.827	-0.036

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.609	1.064	1.607
\delta	-0.100	0.136	0.305
\tau_1/\tau_2	0.727	1.079	1.449
Q_{PAH}	0.732	2.082	4.336
U_{min}	2.760	7.673	14.737
{\rm log}_{10}(\gamma_e)\,	-2.932	-1.934	-0.996

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-3.130	-0.807	0.057
{\rm log}_{10}(\tau_{AGN})\,	0.977	1.410	1.833

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-1.817	-1.329	-0.896
0.03-0.10 Gyr	-1.850	-1.232	-0.580
0.10-0.33 Gyr	-2.498	-1.689	-1.149
0.33-1.08 Gyr	-2.937	-1.949	-1.451
1.08-3.56 Gyr	-3.219	-1.967	-1.636
3.56-11.71 Gyr	-3.244	-1.942	-1.645
11.71-13.01 Gyr	-3.284	-1.974	-1.450

Global parameter details

Documentation

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\,	11.042	11.112	11.181
{\rm log}_{10}({\rm SFR})	0.066	0.577	1.060
{\rm log}_{10}({\rm sSFR})	-11.058	-10.539	-10.078
{\rm stellar\ age}	11.246	12.272	12.337

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-1.196	-0.798	-0.467
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.488	-0.493	0.188

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.512	0.776	1.011
\delta	0.155	0.273	0.356
\tau_1/\tau_2	0.406	0.976	1.518
Q_{PAH}	0.193	0.582	1.401
U_{min}	2.991	8.410	15.886
{\rm log}_{10}(\gamma_e)\,	-3.571	-2.951	-1.851

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-4.472	-3.582	-2.633
{\rm log}_{10}(\tau_{AGN})\,	1.172	1.659	2.010

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-1.283	-0.107	0.551
0.03-0.10 Gyr	0.132	0.678	1.169
0.10-0.33 Gyr	-3.848	-2.567	-0.819
0.33-1.08 Gyr	-7.205	-5.221	-2.300
1.08-3.56 Gyr	-5.287	-3.489	-1.610
3.56-11.71 Gyr	-2.024	-0.804	0.782
11.71-13.01 Gyr	2.091	2.239	2.315