Transient astronomical events that exhibit no evident association with a host galaxy are rare phenomena associated with extremely energetic events. They can offer unique insights into the properties and evolution of stars and galaxies. In this context, we developed the ELEPHANT pipeline (Pessi et al. 2024) to process alerts from the Zwicky Transient Facility (ZTF; Bellm et al. 2019; Graham et al. 2019) ingested by the Fink broker (Möller et al. 2021) and automatically find hostless candidates.
This report includes recent hostless candidates, sumarized below. We encourage classification and follow up of these targets.
These candidates were found through a dedicated Telegram bot, publicly available at https://t.me/fink_hostless . This is part of a series of public bots made available by Fink. The full list can be found here.
| 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 | 2024aami [ZTF24abqwrpk] | 09:45:57.392 | +77:25:47.35 | Reported as a SLSN candidate by Sheng et al. in AstroNote 2024-334 | 09:45:57.392 | +77:25:47.35 | ||||||
| TNS | 2024ypy [ZTF24abntutt] | 22:39:57.192 | -16:27:49.53 | Reported as a SLSN candidate by Sheng et al. in AstroNote 2024-334 | 22:39:57.192 | -16:27:49.53 | ||||||
| TNS | 2024abwf [ZTF24abtsprb] | 09:02:20.000 | +26:54:58.03 | Supernova candidate around peak. | 09:02:19.990 | +26:54:58.01 | ||||||
| TNS | 2024acqp [ZTF24abugpzu] | 09:24:47.133 | +19:22:57.04 | Supernova candidate. Rising or around peak. | 09:24:47.146 | +19:22:56.93 | ||||||
| TNS | 2024absb [ZTF24abteblh] | 20:47:20.451 | +01:01:19.78 | Supernova candidate. Seems to be rising after a shallow bump in the light curve. | 20:47:20.434 | +01:01:19.72 | ||||||
| TNS | 2024adfq [ZTF24abtlppf] | 00:53:14.400 | +53:59:39.33 | Supernova candidate. Slowly rising for two weeks. | 00:53:14.400 | +53:59:39.33 | ||||||
| TNS | 2024acet [ZTF24abrlecu] | 01:49:37.979 | -20:33:24.31 | Supernova candidate. Possibly past peak although there seems to be some bumps. | 01:49:37.979 | -20:33:24.31 | ||||||
| TNS | 2024abkt [ZTF24absoabp] | 21:27:43.685 | -12:57:34.66 | Supernova candidate. Possibly past a flat peak, although there seems to be shallow bumps. | 21:27:43.685 | -12:57:34.66 | ||||||
| TNS | 2024aaxx [ZTF24absazmk] | 04:56:26.163 | +70:40:39.23 | Light curve decline rate is consistent with a CV although the light curve shows a subtle bump, which is not so common in these type of sources. | 04:56:26.170 | +70:40:39.25 | ||||||
| TNS | 2024acnu [ZTF24abtoxri] | 23:26:25.290 | -12:28:33.09 | First reported as a CV candidate, the light curve decline rate is not consistent with a CV. Instead, the light curve seems to be consistent with a supernova, as it seems to show a plateau after its first peak. | 23:26:25.290 | -12:28:33.09 |
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