2025spx

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Information

Transient

Name: AT2025spx
Right ascension: 23h57m28.54s
Declination: -5d56m11.26s
Discovery Date: July 30, 2025, 3:08 a.m.
Classification: None
Redshift: None
MW E(B-V): 0.025

Host

Name:
Right ascension: 23h57m28.50s
Declination: -5d56m11.11s
Redshift: None
Photometric Redshift: 0.198

Processing Status: blocked

Task Name	Status	Time taken (s)
Cutout download	processed	51.65
Transient MWEBV	processed	0.1
Host match	processed	7.32
Host information	processed	0.15
Host MWEBV	processed	0.06
Global aperture construction	processed	0.69
Global aperture photometry	processed	6.67
Validate global photometry	processed	18.35
Global host SED inference	processed	464.68
Local aperture photometry	processed	7.47
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) = 23h57m28.54s, -5d56m11.26s
semi major axis, semi minor axis (arcsec) = 0.61, 0.61
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) = 23h57m28.48s, -5d56m10.98s
semi major axis, semi minor axis (arcsec) = 3.19, 2.97
angle (degrees, anti-clockwise from east) = -121.89

Filter	Flux {\rm (\mu Jy)}	Flux error {\rm (\mu Jy)}	Mag	Mag error	Mag sys
GALEX_FUV	0.22	0.28	25.538	1.373	AB
GALEX_NUV	0.69	0.37	24.306	0.584	AB
SDSS_u	4.67	2.69	22.228	0.625	AB
SDSS_g	29.6	1.89	20.222	0.069	AB
DES_g	36.16	0.4	20.004	0.012	AB
PanSTARRS_g	34.81	0.71	20.046	0.022	AB
SDSS_r	93.83	3.01	18.969	0.035	AB
PanSTARRS_r	94.4	0.63	18.963	0.007	AB
DES_r	105.28	0.91	18.844	0.009	AB
SDSS_i	143.12	4.0	18.511	0.030	AB
PanSTARRS_i	149.14	0.87	18.466	0.006	AB
PanSTARRS_z	180.93	2.05	18.256	0.012	AB
SDSS_z	191.94	10.45	18.192	0.059	AB
DES_z	200.08	2.93	18.147	0.016	AB
PanSTARRS_y	212.59	4.12	18.081	0.021	AB
2MASS_J	283.1	90.55	16.875	0.347	Vega
2MASS_H	257.02	136.43	16.507	0.576	Vega
2MASS_K	591.1	170.04	15.133	0.312	Vega
WISE_W1	116.98	8.78	16.031	0.081	Vega
WISE_W2	61.4	14.74	16.091	0.261	Vega
WISE_W3	-29.2	61.94			Vega
WISE_W4	31.15	402.03	13.546	14.013	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})\,	10.505	10.576	10.656
{\rm log}_{10}({\rm SFR})	-0.483	0.050	0.494
{\rm log}_{10}({\rm sSFR})	-11.098	-10.529	-10.058
{\rm stellar\ age}	5.884	6.732	8.679

Metallicity parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(Z_{\ast}/Z_{\odot})	-1.180	-0.898	-0.699
{\rm log}_{10}(Z_{gas}/Z_{\odot})\,	-1.304	-0.742	-0.205

Dust parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
\tau_2	0.383	0.505	0.626
\delta	-0.940	-0.822	-0.659
\tau_1/\tau_2	0.672	1.023	1.396
Q_{PAH}	0.722	2.495	4.645
U_{min}	2.953	8.412	15.236
{\rm log}_{10}(\gamma_e)\,	-2.390	-1.287	-0.444

AGN parameters

Parameter	Lower (16%)	Median (50%)	Upper (84%)
{\rm log}_{10}(f_{AGN})\,	-4.354	-3.233	-1.980
{\rm log}_{10}(\tau_{AGN})\,	1.045	1.558	1.927

Binned star formation history

Lookback time	Lower (16%)	Median (50%)	Upper (84%)
0.00-0.03 Gyr	-0.235	0.147	0.408
0.03-0.10 Gyr	-0.958	-0.028	0.551
0.10-0.32 Gyr	-1.048	-0.110	0.399
0.32-1.01 Gyr	-1.123	-0.077	0.409
1.01-3.21 Gyr	-0.528	0.342	0.713
3.21-10.19 Gyr	0.462	0.778	0.911
10.19-11.33 Gyr	0.229	0.873	1.588