SN 2018cew
RA/DEC (2000)
23:52:24.200 +28:46:30.07
358.100833 +28.775019
Type
SN Ib
Redshift
Source Group
POSS
Discovery Date
2018-06-04 10:05:27
TNS AT
Y
Public
Y
Host Name
NGC7775
Host Redshift
0.02245
Discovery Mag
18
Filter
V-Johnson
Discoverer/s
R. Gagliano, R. Post, E. Weinberg, J. Newton, T. Puckett

Spectra

 SN_2018cew - 2018-06-11 10:02:39 P60 / SEDM (ZTF)z=
Show H at z=vexp= km/s
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Show Si II at z=vexp= km/s
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Show Ca II at z=vexp= km/s
Show [Ca II] at z=vexp= km/s
Show Fe II at z=vexp= km/s
Show Fe III at z=vexp= km/s
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Show Tellurics 
Show Galaxy lines at z=
Show WR-WN at z=vexp= km/s
Show WR-WC/O at z=vexp= km/s
   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),
Spectra
SelectIDObs-date (UT)Tel / InstExp-TimeObserver/sReducer/sGroupSpectrum ascii fileSpectrum fits fileSpec. TypeAssoc. GroupsEnd prop. periodRemarks
21352018-06-11 10:02:39P60 / SEDM1800SEDmRobotY. SharmaZTF tns_2018cew_2018-06-11_10-02-39_P60_SED-Machine_ZTF.txtObjectZTF
Light Curves
FilterTel / InstObs-date rangePhotometry
Clear-Other_Other2017-12-15 02:25:37 - 2018-06-05 11:44:132
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
295102018-06-05 11:44:13180.321ABMagClear-Other_Other300R Post0.61M with U230 camera at Sierra Remote Observatories, CA, USA Confirmation image
295082017-12-15 02:25:3721ABMagClear-Other_Other30R Post[Last non detection] 0.61M with U230 camera at Sierra Remote Observatories, CA, USA
V-JohnsonOther_Other2018-06-04 10:05:27 - 2018-06-04 10:05:271
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
295092018-06-04 10:05:27180.321ABMagV-JohnsonOther_Other30R Post0.61M with U230 camera at Sierra Remote Observatories, CA, USA
G-GaiaGaia_Gaia-photometric2018-01-27 18:24:28 - 2018-06-01 12:27:212
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
296052018-06-01 12:27:2117.680.2ABMagG-GaiaGaia_Gaia-photometric60Robot
296042018-01-27 18:24:2821.5ABMagG-GaiaGaia_Gaia-photometricRobot[Last non detection]
AT Reportings
IDTime received (UT)SenderReporter/s (Discoverer/s)GroupRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
191572018-06-07 00:00:45Gaia_Bot1A. Delgado, D. Harrison, S. Hodgkin, M. van Leeuwen, G. Rixon, A. Yoldas (University of Cambridge), on behalf of Gaia Alerts teamGaiaAlerts23:52:24.200+28:46:30.072018-06-01 12:27:2117.68G-GaiaPSNGaia18bkiGaiaAlertscandidate SN near radio galaxy NGC 7775
190992018-06-05 14:11:58rspostrspostR. Gagliano, R. Post, E. Weinberg, J. Newton, T. PuckettPOSS23:52:24.200+28:46:30.602018-06-04 10:05:2718V-JohnsonPSNPOSS
Related files
FileFile TypeCommentsLast Modified (UT)Modified By
tns_2018cew_atrep_19099_POSS.JPGGraphics2018-06-05 14:11:58rspostrspost
Classification Reportings
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarks
21282018-06-15 00:48:53ysharmaY. Sharma, D. Neill, N. Blagorodnova, R. Walters on behalf of ZTFZTFSN IbZTF

Comments

Object coordinates updated according to AT-report 19157 of Group GaiaAlerts
Previous RA, DEC: 23:52:24.200, +28:46:30.60 (358.100833, +28.775167)
Updated RA, DEC: 23:52:24.200, +28:46:30.07 (358.100833, 28.775019)

Reshoot on 2458275.942477 in Clear and V shows considerable brightening. The discovery photometry was likely in error due noise in the background and was dimmer than reported. the 2458275.942477 image gives v=18. See attached file