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 of potential host galaxies (taken from the SDSS DR14 and LS DR9) 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 | 2024hgx [ZTF24aaouput] | 22:24:04.980 | +00:11:55.77 | SLSN-II | 0.196 | First discovered by ATLAS on MJD 60425.1, internal name = ATLAS24ghv. Lightcurve is sparsely sampled but is red in colour and shows a ~100 day rise to peak and subsequent plateau at m_i ~ 18.3. Spectral follow-up with LT SPRAT and P60 SEDM show hydrogen features at z = 0.196 ± 0.003 (implying M_i ~ -21.5), although a spectral subtype could not be determined. Further follow-up is required. Offset by 0.4 arcseconds from host candidate in Pan-STARRS. | 22:24:04.990 | +00:11:56.06 | SLSN-II | 0.196 | ||
| TNS | 2024gro [ZTF24aajwajo] | 13:21:29.598 | -10:23:58.10 | Lightcurve showed a relatively fast rise time of ~20 days, followed by a plateau of ~20 days whilst remaining blue. It is now fading and reddening with magnitudes of m_i ~ 19.5-20 and m_g ~21. Two LT SPRAT spectra taken on MJD 60432.0 and MJD 60447.0 show featureless blue continuums. Coincident by eye with a very faint possible object in Pan-STARRS, although no photo-z is available, and no source is detected at the depth of Pan-STARRS imaging within 14.4 arcseconds. | 13:21:29.598 | -10:23:58.10 | ||||||
| TNS | 2024lch [ZTF24aapfbql] | 16:57:04.016 | +25:32:07.72 | First dicovered by Pan-STARRS on MJD 60467.5, internal name = PS24dxr. ~40 day rise so far and remaining blue, possibly peaking at m_g ~ m_r ~ 19.6. Offset from faint object in LS DR9 with photo z = 0.551 ± 0.237 at a distance of 1.2 arcseconds. | 16:57:04.016 | +25:32:07.72 | SLSN-I | 0.402 | ||||
| TNS | 2024jwx [ZTF24aaowjlw] | 15:10:09.230 | +06:45:05.90 | Rising for ~40 days so far and remaining blue, currently m_g ~ 18.5. Detected in LT IO:O u-band on MJD 60475.9 and MJD 60479.0 at m_u = 18.699 ± 0.169 and m_u = 18.988 ± 0.209 respectively. Coincident with a host candidate with SDSS photo z = 0.399 ± 0.1184 3.8 arcseconds away. A fainter object with photo z = 0.802 ± 0.563 is detected in LS DR9 offset by 0.3 arcseconds from the transient. | 15:10:09.230 | +06:45:05.90 | SLSN-I | 0.13 | ||||
| TNS | 2024lpk [ZTF24aaovreb] | 16:33:22.131 | +44:12:59.54 | Rising for ~40 days so far and remaining blue, possibly peaking at m_g ~ m_r ~ 20. Coincident with faint host candidate with SDSS photo z = 0.440 ± 0.0813 offset by 1.1 arcseconds from the position of the transient. | 16:33:22.131 | +44:12:59.54 | ||||||
| TNS | 2024jbi [ZTF24aagvvun] | 01:01:27.800 | +22:49:07.90 | Lightcurve is sparsely sampled but shows a possible rise time of ~80 days, currently m_i ~ 18.3 and likely at peak. Coincident with host candidate with SDSS photo z = 0.155 ± 0.0425 offset by 1.3 arcseconds from the position of the transient. | 01:01:27.800 | +22:49:07.90 | SN II | 0.0666 | ||||
| TNS | 2024ixo [ZTF24aaosgwr] | 21:52:30.686 | +02:14:01.19 | First detected by GOTO on MJD 60442.2, internal name = GOTO24brl. Rising for ~30 days so far, lightcurve is red with m_r ~ 18.8 and m_i ~ 18.6. Offset 1.9 arcseconds from faint host candidate with SDSS photo z = 0.205 ± 0.0488. | 21:52:30.690 | +02:14:01.18 | SLSN-II | 0.22 | ||||
| TNS | 2024jox [ZTF24aanpztl] | 12:17:18.236 | +07:41:33.03 | Lightcurve shows a ~15 day rise followed by a continuing ~25 day plateau at peak, remaining blue with m_g ~ 19.2 and m_r ~19.2. Spiral galaxy ~2.5 arcseconds to SE has spec z = 0.1420, and host candidate galaxy has SDSS photo z = 0.134 ± 0.0571. | 12:17:18.236 | +07:41:33.03 | ||||||
| TNS | 2024irr [ZTF24aanboby] | 15:29:07.844 | +11:06:56.14 | SDSS J152907.77+110656.3 | Lightcurve displayed a fast rise time of ~10 days, but is remaining blue on the decline (~30 days so far). Currently m_g ~ m_r ~ 20. Coincident with host candidate with LS DR9 photo z = 0.308 ± 0.133 at an offset of 0.9 arcseconds from the position of the transient. | 15:29:07.844 | +11:06:56.14 |
| File | Comments |
|---|---|
 ZTF24aajwajo_20240501.spec | 2024gro/ZTF24aajwajo LT SPRAT spectrum MJD 60432.0 |
| ZTF24aajwajo_20240516.spec | 2024gro/ZTF24aajwajo LT SPRAT spectrum MJD 60447.0 |
| spec_auto_robot_lstep1__crr_b_ifu20240611_10_23_22_ZTF24aaouput.txt | 2024hgx/ZTF24aaouput/ATLAS24ghv P60 SEDM spectrum MJD 60472.4 |
| ZTF24aaouput_20240618.spec | 2024hgx/ZTF24aaouput/ATLAS24ghv LT SPRAT spectrum MJD 60480.2 |