The Zwicky Transient Facility (ZTF; Bellm et al. 2019; Graham et al. 2019) Superluminous Supernova Science Program (Lunnan et al. 2020; Yan et al. 2020; Chen et al. 2023a,b) reports 9 candidate SLSNe, following the methodology outlined by Perley et al. (in prep.). We in general selected transients that have long rise time (>20 days) and/or faint host galaxies.
We summarise properties of the candidates in the Related Objects Table. These include coordinates, current magnitudes, approximate rise times, photometric redshifts and apparent magnitudes of potential host galaxies (taken from the SDSS DR14, LS DR9 and PS1), and special remarks.
Spectroscopic classifications and additional follow-up observations of these transients are encouraged.
This report is based on observations obtained with the Samuel Oschin Telescope 48-inch and the 60-inch Telescope at the Palomar Observatory as part of the Zwicky Transient Facility project. ZTF is supported by the National Science Foundation under Grant No. AST-2034437 and a collaboration including Caltech, IPAC, the Weizmann Institute for Science, the Oskar Klein Center at Stockholm University, the University of Maryland, Deutsches Elektronen-Synchrotron and Humboldt University, the TANGO Consortium of Taiwan, the University of Wisconsin at Milwaukee, Trinity College Dublin, Lawrence Livermore National Laboratories, and IN2P3, France. Operations are conducted by COO, IPAC, and UW.
| 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 | 2024ncd [ZTF24aatchko] | 17:02:56.209 | +29:33:12.08 | SN | SDSS J170256.23+293312.3 | Displayed a ~30 day rise to peak, now fading and reddening at r~19.8 g~20.5. Possibly offset by 0.3 arcseconds from a r ~ 20.5 host candidate with SDSS photo z = 0.213 ± 0.082. Observed by ePESSTO+ on MJD 60504.10 and classified as a SN in AstroNote #2024-194, spectrum was blue and largely featureless. | 17:02:56.209 | +29:33:12.08 | SN | |||
| TNS | 2024phh [ZTF24aaumyhv] | 15:35:38.077 | +58:35:34.37 | Displayed a ~30 day rise to peak, now possibly fading but remaining blue as of MJD 60536.28 at g~r~19.5. Possibly offset by 0.3 arcseconds from a r ~ 22.0 host candidate with LS DR9 photo z = 0.309 ± 0.209. | 15:35:38.077 | +58:35:34.37 | ||||||
| TNS | 2024qef [ZTF24aaxhvbu] | 22:29:36.401 | +00:29:53.31 | Displayed a ~30 day rise to peak, now fading with g~r~19.5. Offset by ~3.6 arcseconds from a r ~ 19.3 host candidate with SDSS photo z = 0.197 ± 0.030. | 22:29:36.401 | +00:29:53.31 | SN | |||||
| TNS | 2024psa [ZTF24aavzorr] | 13:51:15.131 | +52:24:06.50 | Displayed a fast rise to peak of ~10-15 days, now fading but remains largely blue at g~r~18.75. Offset by ~2.4 arcseconds from a r ~ 20.2 host candidate with SDSS photo z = 0.108 ± 0.077. A Shane KAST spectrum taken on MJD 60531.21 shows a blue continuum with broad features, although fits with Next Generation Superfit (NGSF, Goldwasser et al. 2022) were inconclusive in determining a type or redshift. | 13:51:15.131 | +52:24:06.50 | ||||||
| TNS | 2024pyl [ZTF24aawurfo] | 14:08:42.843 | +14:56:44.42 | Lightcurve has shown a rise of ~35 days so far with little colour change 20 days into the rise (last g-band detection on MJD 60530.18), now r~18.5. Offset by ~1.6 arcseconds from a r ~ 20.1 host candidate with SDSS photo z = 0.282 ± 0.107. | 14:08:42.825 | +14:56:44.18 | ||||||
| TNS | 2024qkw [ZTF24aaxmpyh] | 00:11:45.256 | +06:38:46.74 | Lightcurve has been slowly rising for the past ~30 days and displaying little colour change, now at g~r~19. Flagged as a NEEDLE TDE candidate in AstroNote #2024-222, although it is ~0.8 arcseconds offset from the nucleus of a g ~ 18.3 r ~ 17.3 spiral galaxy with SDSS photo z = 0.130 ± 0.017, and so is more likely to be a luminous SN than a TDE. | 00:11:45.256 | +06:38:46.74 | SN Ia-pec | 0.0461 | ||||
| TNS | 2024nda [ZTF24aaskeha] | 19:50:55.147 | +60:54:03.59 | Lightcurve displays a ~40 day rise to peak, remaining blue on a plateau of ~40 days with g~r~19.7. No detected host candidate at the depth of PS1. | 19:50:55.147 | +60:54:03.59 | ||||||
| TNS | 2024nbk [ZTF24aatkycx] | 17:37:38.482 | +48:07:01.41 | Lightcurve displayed a ~20 day rise to peak, and is now on a plateau of ~40 days so far and may have somewhat reddened from peak. Currently r~19.3 g~19.8. Possibly offset by ~0.3 arcseconds from a r ~ 21.0 (PS1) host candidate in with an unconstrained photo z (LS DR9 photo z = 0.519 ± 0.581). | 17:37:38.482 | +48:07:01.41 | ||||||
| TNS | 2024sli [ZTF24aartvyz] | 16:11:19.300 | +45:08:36.56 | Lightcurve displayed a slow rise of ~20 days to peak, now on a plateau of ~60 days and somewhat reddened from peak. Currently r~20.2 g~20.7. No host candidate is significantly detected at the location of the transient, although a faint source is possibly visible by eye in LS DR9 imaging at the location of the transient. | 16:11:19.300 | +45:08:36.56 |
| File | Comments |
|---|---|
 ZTF24aavzorr_finalspec.txt | 2024psa/ZTF24aavzorr Shane KAST spectrum |