AstroNote 2020-73

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DRAFT
2020-04-01 18:03:38
Type: Object/s-Discovery/Classification
ZTF early discovery and rapid follow-up of the potential infant SN ZTF20aatzhhl / 2020fqv
Authors: Rachel Bruch (WIS), Jesper Sollerman (OKC), Yi Yang, Steve Schulze, Avishay Gal-Yam (WIS)
Source Group: ZTF
Abstract:
We report the ZTF discovery of ZTF20aatzhhl / 2020fqv - a potential rapidly rising young supernova in the nearby galaxy NGC 4568, z=0.0075. At a distance of ~32 Mpc the transient was discovered on March 31, 2020 at 08:06 UT with an absolute ZTF g-band magnitude of M = -13.5. We encourage follow-up observations of this transient.

We draw attention to the rapidly-rising, potentially young supernovae in a nearby galaxy. The object was first discovered by ALeRCE (2020TNSTR.914....1F) in ZTF-g band images obtained on March 31, 2020 at 08:06 UT, about 3 days after the last non-detection. The object is in the TESS fields. 

The lightcurve rose by ~ 2.4 magnitudes within 1 day suggesting that this potential SN is indeed ~1 day old.

Assuming the redshift of the host (NGC 4568, z=0.007522 from NED), the SN was discovered around absolute magnitude Mg=-13.53. We triggered Swift photometry and additional observations are ongoing. The current brightness of the SN is g=16.62 mag. At the redshift of SN, this translates to a g-band luminosity of -15.9 mag.

We will continue to distribute alerts on such early SN detections via AstroNotes; additional follow-up observations of this transient are highly encouraged.

ZTF is a project led by PI S. R. Kulkarni at Caltech, and includes IPAC; WIS, Israel; OKC, Sweden; JSI/UMd, USA; UW,USA; DESY, Germany; NRC, Taiwan; UW Milwaukee, USA and LANL USA. ZTF acknowledges the generous support of the NSF under AST MSIP Grant No 1440341. Alert distribution service provided by DIRAC@UW. Alert filtering is being undertaken by the GROWTH marshal system (Kasliwal et al. 2019), supported by NSF PIRE grant 1545949.

Show current TNS values
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftRemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2020fqv [ZTF20aatzhhl]12:36:33.266+11:13:54.04SNNGC 45680.00752212:36:33.261+11:13:53.96SN IIb0.007522