2026atj

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Information

Transient

Name: AT2026atj
Right ascension: 21h53m40.80s
Declination: 15d16m07.06s
Discovery Date: Jan. 18, 2026, 2:04 a.m.
Classification: None
Redshift: None
MW E(B-V): 0.091

Host

Name:
Right ascension: 21h53m40.93s
Declination: 15d16m04.98s
Redshift: None
Photometric Redshift: 0.085

Processing Status: completed

Task Name	Status	Time taken (s)
Cutout download	processed	16.68
Transient MWEBV	processed	0.04
Host match	processed	5.01
Host information	processed	0.15
Host MWEBV	processed	0.04
Global aperture construction	processed	0.65
Global aperture photometry	processed	4.35
Validate global photometry	processed	11.95
Global host SED inference	processed	412.38
Local aperture photometry	processed	4.67
Validate local photometry	processed	0.02
Local host SED inference	processed	451.13

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) = 21h53m40.80s, 15d16m07.06s
semi major axis, semi minor axis (arcsec) = 1.25, 1.25
angle (degrees, anti-clockwise from east) = 0.0

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
PanSTARRS_r	26.76	0.33	20.331	0.013	AB
PanSTARRS_i	33.63	0.41	20.083	0.013	AB
PanSTARRS_z	34.2	1.0	20.065	0.032	AB
PanSTARRS_y	41.18	2.47	19.863	0.065	AB

Aperture details

RA, DEC (J2000) = 21h53m40.96s, 15d16m05.05s
semi major axis, semi minor axis (arcsec) = 8.89, 6.1
angle (degrees, anti-clockwise from east) = -136.46

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
GALEX_FUV	35.6	3.89	20.021	0.119	AB
GALEX_NUV	65.34	3.02	19.362	0.050	AB
PanSTARRS_g	655.53	1.89	16.859	0.003	AB
PanSTARRS_r	939.81	1.91	16.467	0.002	AB
PanSTARRS_i	1181.44	2.43	16.219	0.002	AB
PanSTARRS_z	1285.19	5.82	16.128	0.005	AB
PanSTARRS_y	1446.15	14.44	15.999	0.011	AB
2MASS_J	1767.24	170.54	14.887	0.105	Vega
2MASS_H	1913.58	248.08	14.328	0.141	Vega
2MASS_K	1845.98	309.23	13.897	0.182	Vega
WISE_W1	693.03	25.28	14.099	0.040	Vega
WISE_W2	441.2	26.29	13.949	0.065	Vega
WISE_W3	1147.84	91.77	11.076	0.087	Vega
WISE_W4	1833.47	573.69	9.122	0.340	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})\,	8.694	8.915	9.066
{\rm log}_{10}({\rm SFR})	-1.611	-1.033	-0.393
{\rm log}_{10}({\rm sSFR})	-10.560	-9.927	-9.228
{\rm stellar\ age}	2.890	5.971	7.677

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-1.585	-1.015	-0.385
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.338	-0.658	0.093

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.083	0.278	0.717
\delta	-0.709	-0.237	0.190
\tau_1/\tau_2	0.651	1.015	1.379
Q_{PAH}	1.146	2.934	5.342
U_{min}	3.193	8.139	14.628
{\rm log}_{10}(\gamma_e)\,	-2.998	-1.898	-0.642

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-1.437	-0.293	0.078
{\rm log}_{10}(\tau_{AGN})\,	1.050	1.666	2.003

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-1.558	-1.163	-0.758
0.03-0.10 Gyr	-1.837	-1.012	-0.288
0.10-0.33 Gyr	-1.649	-0.929	-0.256
0.33-1.07 Gyr	-1.831	-1.044	-0.584
1.07-3.48 Gyr	-2.021	-1.093	-0.796
3.48-11.37 Gyr	-1.939	-1.094	-0.780
11.37-12.64 Gyr	-2.118	-1.113	-0.471

Global parameter details

Documentation

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(M_{\ast}/M_{\odot})\,	10.180	10.302	10.438
{\rm log}_{10}({\rm SFR})	-1.208	-0.025	0.572
{\rm log}_{10}({\rm sSFR})	-11.591	-10.344	-9.734
{\rm stellar\ age}	2.113	4.533	6.331

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-1.440	-1.060	-0.757
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.438	-0.462	0.232

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.114	0.184	0.320
\delta	-0.844	-0.558	-0.142
\tau_1/\tau_2	0.627	1.028	1.448
Q_{PAH}	0.361	1.263	2.995
U_{min}	2.771	8.239	15.967
{\rm log}_{10}(\gamma_e)\,	-3.290	-2.228	-1.364

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-4.349	-3.342	-2.348
{\rm log}_{10}(\tau_{AGN})\,	1.096	1.566	1.946

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-2.115	-0.426	0.012
0.03-0.10 Gyr	-1.517	0.043	0.713
0.10-0.33 Gyr	0.372	0.961	1.356
0.33-1.07 Gyr	0.174	0.846	1.135
1.07-3.48 Gyr	-0.725	0.430	0.790
3.48-11.37 Gyr	-1.218	0.131	0.468
11.37-12.64 Gyr	-1.452	0.084	0.706