Discovery certificate for object 2015dl
TNS Astronomical Transient Report No. 72676 [ 2020TNSTR1673....1C ]

Date Received (UTC): 2020-06-03 07:26:40
Sender: Vîntdevară Dumitru Ciprian
Reporting Group: None     Discovery Data Source: None

Vîntdevară Dumitru Ciprian report/s the discovery of a new astronomical transient.

IAU Designation: AT 2015dl
Coordinates (J2000): RA = 14:02:16.780 (210.569917) DEC = +54:26:20.50 (54.439028)
Discovery date: 2015-02-10 21:41:45.600 (JD=2457064.404)

Potential host galaxy: M 101
Host redshift: 0.000804

Remarks: On the 10th of February 2015 I reported a new transient object in M101 to CBAT: http://www.cbat.eps.harvard.edu/unconf/followups/J14021678+5426205.html This was later confirmed as a Luminous Red Nova: http://www.astronomerstelegram.org/?read=8599 Other sources: http://www.vgoranskij.net/lrn2015-in-m101.pdf https://iopscience.iop.org/article/10.3847/1538-4357/834/2/107 http://www.rochesterastronomy.org/sn2015/snname.html https://ui.adsabs.harvard.edu/abs/2017ApJ...834..107B/abstract http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NAME+M101+OT2015-1 At the moment, the transient is called M101 OT2005-1: https://en.wikipedia.org/wiki/M101_OT2015-1

Photometry

Discovery (first detection):
Discovery date: 2015-02-10 21:41:45.600
Flux: 16.5 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: The transient was discovered with a newtonian telescope 0,2 m + CCD camera ATIK 320E (on unfiltered) + EQ6 mount.

Last non-detection:
Archival info: DSS

Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2015dl