AstroNote 2019-124

We announce the beginning of public reports to the Transient Name Sever (TNS) of transients saved as a part of the volume limited experiment of the Zwicky Transient Facility (Bellm et al. 2019; Graham et al. 2019). The volume-limited experiment saves transients with at least two detections in either g or r filters separated by at least 30 mins, and coincident within 100" of galaxies with known spectroscopic redshifts in Census of the Local Universe (CLU; Cook et al. 2019) catalog within 200 Mpc. We plan to report all transients passing this filter in the ZTF public alert stream (ATel #11685) to TNS with the "sender" keyword set to "ZTF_CLU_PUBLIC".

Here, we report the discovery of 5 transients reported since 2019-10-27.
Name | IAUNAME | R.A. | Dec. | t_1st [1] | mag_1st[2] | band | Note
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ZTF19acnjwgm | AT2019ubs | 02:26:24.1 | +28:30:28.5 | 2019-11-03 | 20.30 | g | [3]
ZTF19acnphay | AT2019ubr | 06:25:52.3 | +64:44:38.4 | 2019-10-16 | 20.03 | r | [4]
ZTF19acmgfkc | AT2019tyf | 01:14:55.2 | -14:27:29.0 | 2019-11-02 | 19.85 | g | [5]
ZTF19acklfll | AT2019tuj | 00:54:40.93 | -01:34:30.0 | 2019-10-29 | 19.87 | g | [6]
ZTF19achetvw | SN2019tkn | 00:25:42.0 | +08:38:08.6 | 2019-10-25 | 19.82 | g | [7]

[1] Date of first detection
[2] Magnitude of first detection in respective band
[3] Rising source on spiral arm of UGC 01895 at z = 0.034, absolute magnitude of M = -15.5.
[4] Candidate reddened / low luminosity supernova in UGC 03458 at z = 0.014, absolute magnitude of M = -13.8.
[5] In WISEA J011455.31-142729.7 at z = 0.045, absolute magnitude M = -16.6
[6] In ZwCl 0054.6-0127 02 at z = 0.042, absolute magnitude M = -16.3
[7] In CGCG 409-013 at z = 0.044, classified by ePESSTO as SN Ia in AstroNote 2019-116.

We encourage spectroscopic follow-up of nearby transients and candidate supernovae in this stream.

ZTF is a project led by PI S. R. Kulkarni at Caltech (see ATEL #11266), 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 (Patterson et al. 2019). Alert filtering is being undertaken by the GROWTH marshal system (Kasliwal et al. 2019), supported by NSF PIRE grant 1545949. We acknowledge the support from the Heising-Simons Foundation under Grant No. 12540303.