AT 2023uqm was first discovered by ATLAS on October 10, 2023 with RA = 23:10:39.010, Dec = +34:54:10.63 (J2000). It was classified as an AGN at z=0.238 in TNS AstroNote 2023-290 by group ePESSTO+. Recently, the ZTF group discovered a re-brightening or a new flare towards AT 2023uqm. Moreover, there are three flares of ~1 mag amplitude prior to the first TNS alert. These five events suggest a tentative periodicity of about 420 rest-frame days. (AstroNote 2025-120).
Multiple mid-infrared flares were detected towards AT 2023uqm in the NEOWISE survey. The accompanying figure shows the optical light curve from ZTF alongside the mid-infrared light curve from NEOWISE, revealing two pronounced mid-infrared flares occurring monthly after the optical peaks. The peak magnitudes of these flares are:
MJD W1 W2
59757 15.87+/-0.02 15.83+/-0.04
60283 15.32+/-0.02 15.14+/-0.04
with WISE W2 luminosities of 8.7e42, 1.6e43 erg/s. They are likely the dust echoes of the corresponding optical flares.
Further spectroscopic follow-up observations have been scheduled.
| Catalog | Name | Reported RA | Reported DEC | Reported Obj-Type | Reported Redshift | Host Name | Host Redshift | Remarks | TNS RA | TNS DEC | TNS Obj-Type | TNS Redshift |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TNS | 2023uqm | 23:10:39.016 | +34:54:11.01 | AGN | 0.238 | 23:10:39.016 | +34:54:11.01 | AGN | 0.238 |
Comments
This figure shows the optical light curve from ZTF alongside the mid-infrared light curve from NEOWISE.