AT 2020crn
RA/DEC (2000)
14:39:56.974 -15:27:28.00
219.98739205 -15.45777735
Type
---
Redshift
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2020-02-13 13:31:20.000
TNS AT
Y
Public
Y
Discovery Mag
18.58
Filter
g-ZTF
Reporter/s
J. Nordin, V. Brinnel, M. Giomi, J. van Santen (HU Berlin), A. Gal-Yam, O. Yaron, S. Schulze (Weizmann) on behalf of ZTF
Spectra
No Data
Light Curves
FilterTel / InstObs-date rangePhotometry
cyan-ATLASATLAS-HKO_ATLAS-022020-02-23 11:38:24 - 2020-02-23 11:38:241
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
1229262020-02-23 11:38:2419.0350.10119.45ABMagcyan-ATLASATLAS-HKO_ATLAS-0230Robot
orange-ATLASATLAS-MLO_ATLAS-012020-02-16 15:50:24 - 2020-02-16 15:50:241
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
1229252020-02-16 15:50:2418.2ABMagorange-ATLASATLAS-MLO_ATLAS-0130Robot[Last non detection]
g-ZTFP48_ZTF-Cam2020-02-13 13:31:20 - 2020-02-13 13:31:201
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
1207722020-02-13 13:31:2018.580.1319.11ABMagg-ZTFP48_ZTF-Cam30
r-ZTFP48_ZTF-Cam2020-02-07 12:02:38 - 2020-02-16 11:40:372
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
1207732020-02-16 11:40:3719.380.1319.88ABMagr-ZTFP48_ZTF-Cam30
1207712020-02-07 12:02:3819.5003ABMagr-ZTFP48_ZTF-Cam30[Last non detection]
AT Reports
IDTime received (UT)SenderReporter/sReportting groupDisc. Data SourceRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
629622020-02-26 16:50:15ATLAS_Bot1J. Tonry, L. Denneau, A. Heinze, H. Weiland, H. Flewelling (IfA, University of Hawaii), B. Stalder (LSST), A. Rest (STScI), C. Stubbs (Harvard University), K. W. Smith, S. J. Smartt, D. R. Young, S. Srivastav, O. McBrien, D. O'Neill, P. Clark, M. Fulton, J. Gillanders, M. Dobson (Queen's University Belfast), T.-W. Chen (MPE), D. E. Wright (University of Minnesota), J. Anderson (ESO)ATLASATLAS14:39:56.961-15:27:27.852020-02-23 11:38:24.00019.035cyan-ATLASPSNATLAS20gxeATLAS
620122020-02-16 12:23:15ZTF_AMPEL_NEWJ. Nordin, V. Brinnel, M. Giomi, J. van Santen (HU Berlin), A. Gal-Yam, O. Yaron, S. Schulze (Weizmann) on behalf of ZTFZTFZTF14:39:56.974-15:27:28.002020-02-13 13:31:20.00018.58g-ZTFPSNZTF20aanaigsZTFSee arXiv:1904.05922 for selection criteria.
Classification Reports
No Data

Comments

The correct coordinates for the panSTARRS image of 2020crn and the magnitude readings are:

ra =14:39:56.97 -15:27:28.4

ra = 219.987389 dec = -15.457884.

Sorry for any confusion :)

A PanSTARRS g-band image from 2011-05-04 shows a 4 or 5 pixel square at coordinates: ra=219.387389  dec=-15.457884 which might well be a likely candidate for the host system.

I calculated two magnitude values for this space which are 20.68 and 20.82. The first value 20.68 was calculated by using a 3 pixel radius aperture and the 20.82 value using a 6 pixel radius aperture. The reference star used is GAIA object id 6286727661914840576, for which I used a 6 pixel radius aperture for in both values. (Credit to Aperture Photometry Tool)

The FITS frame used is: Downloads\rings.v3.skycell.1020.017.stk.g.unconv.fits  which has the date: MJD-OBS =55685.793648784. Image is attached.

An apparent nova outburst was detected by Sam Deen which occurred on 30 June and 1 July 2000, using archival r-band images from the La Silla Observatory's 2.2-meter MPG/ESO Telescope at coordinates ra=14:39:56.989 dec=-15:27:28.04. The images were originally taken as part of a program to follow-up the Trans-Neptunian Object 2000 JH81. On 30 June, the transient appears to have an r-band magnitude of 21.5 and by 1 July it had brightened to an r-band magnitude of 19.4. In a 360-second exposure in the wide-band GRI filter by the Canada-France-Hawaii Telescope, a point-like source of roughly magnitude = 25 is visible at coordinates ra=14:39:56.971 dec=-15:27:27.94.

http://www.eso.org/sci/facilities/lasilla/telescopes/national/2p2/overview.html

https://www.cfht.hawaii.edu/