AT 2025afvr/ZTF25acfyeke (RA = 01:07:36.287, Dec = +24:22:39.83) was discovered by the ZTF survey on 2025-11-25 (MJD = 61004.14), in the galaxy SDSS J010736.29+242239.7. The host galaxy is faint and there is not a clear resolved nucleus, but the transient appears central. Since its discovery (~22 days ago) it is slowly rising. Throughout its evolution it shows persistent blue optical colours (ZTF g-r ~ -0.4); corrected for MW extinction: Av = 0.118).
We obtained a NOT/ALFOSC optical spectrum to classify the transient (MJD 61025.93). The spectrum is blue and featureless. However, we note that the conditions were not optimal (seeing ~ 2''). There are no evident host galaxy lines and no spectroscopic redshift for the host. In SDSS we find a photo-z of 0.381 for the host. At this redshift, we potentially can identify NaID absorption but no other galaxy line. Correspondingly, the latest g-band absolute magnitude (corrected for MW extinction; Av = 0.118) would be M = –23.2. Based on the spectra, the location of the transient, and its persistent blue optical colours, it is possible that AT 2025afvr is a featureless tidal disruption event, however another type of transient cannot be ruled-out yet. Further follow-up to determine the nature of the transient is encouraged. Until then, we classify the transient as "Other".
| 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 | 2025afvr [ZTF25acfyeke] | 01:07:36.287 | +24:22:39.83 | Other | SDSS J010736.29+242239.7 | 01:07:36.302 | +24:22:39.82 | TDE-featureless |
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