SN 2018gep
RA/DEC (2000)
16:43:48.201 +41:02:43.38
250.950837548 +41.0453830323
Type
SN Ic-BL
Redshift
0.032
Source Group
None
Discovery Date
2018-09-09 03:55:17
TNS AT
Y
Public
Y
Host Name
SDSS J164348.22+410243.3
Host Redshift
0.033
Discovery Mag
20.48
Filter
r-ZTF
Discoverer/s
Anna Ho (Caltech), Steve Schulze (WIS), Daniel Perley (LJMU), Scott Adams (Caltech) Jackob den Brok (ETH), Nikita Kamraj (Caltech), Mansi Kasliwal (Caltech), Michael Koss (UW Seattle), Daniel Stern (JPL), on behalf of the Zwicky Transient Facility (ZTF) collaboration

Spectra

 SN_2018gep - 2018-09-19 05:42:17 FTN / FLOYDS-N (Global SN Project)z=
Show H at z=vexp= km/s
Show He at z=vexp= km/s
Show He II at z=vexp= km/s
Show O at z=vexp= km/s
Show [O I] at z=vexp= km/s
Show O II at z=vexp= km/s
Show [O II] at z=vexp= km/s
Show [O III] at z=vexp= km/s
Show Na at z=vexp= km/s
Show Mg at z=vexp= km/s
Show Mg II at z=vexp= km/s
Show Si II at z=vexp= km/s
Show S II at z=vexp= km/s
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
Show Å at z=vexp= km/s
Show Å at z=vexp= km/s
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),0 (observed)
Spectra
SelectIDObs-date (UT)Tel / InstExp-TimeObserver/sReducer/sGroupSpectrum ascii fileSpectrum fits fileSpec. TypeAssoc. GroupsEnd prop. periodRemarks
28112018-09-19 05:42:17FTN / FLOYDS-N1800Las Cumbres ObservatoryJamison BurkeGlobal SN Project tns_2018gep_2018-09-19_05-42-17_FTN_FLOYDS-N_Global_SN_Project.ascii tns_2018gep_2018-09-19_05-42-17_FTN_FLOYDS-N_Global_SN_Project.fitsObjectGlobal SN Project
Light Curves
FilterTel / InstObs-date rangePhotometry
cyan-ATLASATLAS1_ACAM12018-10-05 06:21:36 - 2018-10-09 05:22:332
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
944062018-10-09 05:22:3318.9930.12519.59ABMagcyan-ATLASATLAS1_ACAM130Robot
944052018-10-05 06:21:3619.47ABMagcyan-ATLASATLAS1_ACAM130Robot[Last non detection]
r-ZTFP48_ZTF-Cam2018-09-09 03:22:45 - 2018-09-09 03:55:172
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
356082018-09-09 03:55:1720.480.2620.53Otherr-ZTFP48_ZTF-Camr-ZTF mag
356072018-09-09 03:22:4520.47Otherr-ZTFP48_ZTF-Cam[Last non detection] r-ZTF mag
AT Reportings
IDTime received (UT)SenderReporter/s (Discoverer/s)GroupRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
492022019-10-10 14:33:07ATLAS_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)ATLAS16:43:48.201+41:02:43.382018-10-09 05:22:3318.993cyan-ATLASPSNATLAS18vahATLAS
225592018-09-11 13:58:51annayqhoAnna Ho (Caltech), Steve Schulze (WIS), Daniel Perley (LJMU), Scott Adams (Caltech) Jackob den Brok (ETH), Nikita Kamraj (Caltech), Mansi Kasliwal (Caltech), Michael Koss (UW Seattle), Daniel Stern (JPL), on behalf of the Zwicky Transient Facility (ZTF) collaborationZTF16:43:48.222+41:02:43.372018-09-09 03:55:1720.48r-ZTFPSNZTF18abukavn
Classification Reportings
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarks
28042018-09-24 17:01:37jburkeJamison Burke, Iair Arcavi, Daichi Hiramatsu, D. Andrew Howell, Curtis McCully, Stefano ValentiGlobal SN ProjectSN Ic-BL0.032Global SN ProjectUsing SNID (Blondin & Tonry 2007, ApJ, 666, 1024), we find multiple fits to Ic-BL around maximum light. We measure the ejecta velocity to be roughly 24,000 km/s, consistent across features of CaII, MgII, FeII, SiII, and OI. This value is high even for a Ic-BL, but within the parameter space of previous samples (Modjaz et al. 2016, ApJ, 832, 108). We measure the redshift to be 0.032 based on narrow host galaxy hydrogen lines.

Comments

Object coordinates updated according to AT-report 49202 of Group ATLAS
Previous RA, DEC: 16:43:48.222, +41:02:43.37 (250.950926, +41.04538)
Updated RA, DEC: 16:43:48.201, +41:02:43.38 (250.950837548, 41.0453830323)