Discovery certificate for object 2019dlz
TNS Astronomical Transient Report No. 33074 [ 2019TNSTR.572....1G ]

Date Received (UTC): 2019-04-14 16:36:57
Sender: Mr. Mi Zhang
Source Group: XOSS

Mi Zhang and Xing Gao report/s the discovery of a new astronomical transient.

IAU Designation: AT 2019dlz
Discoverer internal name: XM10MZ
Coordinates (J2000): RA = 09:55:51.000 (148.9625) DEC = +69:02:32.30 (69.042306)
Discovery date: 2019-04-14 16:03:43 (JD=2458588.1692477)

Potential host galaxy: M81

Remarks: Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 19.8) on severl 300-s survey images (limiting mag about 21.5) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Apr. 14.66925 UT using a unfiltered CCD ( + 0.6-m f/8 Ritchey-Chretien telescope ). The transient approximately located at R.A.=09h55m51.00s +69d02'32".3 (equinox 2000.0). Which is about 95.6" east and 82.8" south of the center of the M81. Nothing is visible at this position on archival images taken on Apr. 09.66934 (limiting mag 21.5). NET UCAC-4 XM10MZ C2019 04 14.66925 09 55 51.00 +69 02 32.3 19.8 V C42 All images can be seen from: http://www.xjltp.com/XOSS/XM10MZ/XM10MZ.htm C42,Xingming Observatory - NEXT, Mt. Nanshan. Observers M.Zhang,X.Gao,Measurers M.Zhang, 0.6-m f/8 Ritchey-Chretien telescope and CCD.

Photometry

Discovery (first detection):
Discovery date: 2019-04-14 16:03:43
Flux: 19.8 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 19.8) on severl 300-s survey images (limiting mag about 21.5) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Apr. 14.66925 UT using a unfiltered CCD ( + 0.6-m f/8 Ritchey-Chretien telescope ). The transient approximately located at R.A.=09h55m51.00s +69d02'32".3 (equinox 2000.0). Which is about 95.6" east and 82.8" south of the center of the M81. Nothing is visible at this position on archival images taken on Apr. 09.66934 (limiting mag 21.5). NET UCAC-4 XM10MZ C2019 04 14.66925 09 55 51.00 +69 02 32.3 19.8 V C42 All images can be seen from: http://www.xjltp.com/XOSS/XM10MZ/XM10MZ.htm C42,Xingming Observatory - NEXT, Mt. Nanshan. Observers M.Zhang,X.Gao,Measurers M.Zhang, 0.6-m f/8 Ritchey-Chretien telescope and CCD.

Last non-detection:
Last non-detection date: 2019-04-09 16:03:51
Limiting flux: 21.5 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: using a unfiltered CCD ( + 0.6-m f/8 Ritchey-Chretien telescope ).

Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2019dlz