SN 2018gk
RA/DEC ()
16:35:54.060 +40:01:58.01
248.97525 +40.032781
Type
SN II
Redshift
Source Group
ASAS-SN
Discovery Date
2018-01-13 15:21:36
TNS AT
Y
Public
Y
Host Name
WISE J163554.27+400151.8
Host Redshift
0.031
Comments
[Object redshift updated according to host-redshift by admin]
Discovery Mag
16.6
Filter
V-Johnson
Discoverer/s
J. Brimacombe, G. Stone, K. Z. Stanek, for the ASAS-SN team

Spectra

 SN_2018gk - 2018-01-14 12:53:02 FLWO-1.5m / FAST (ASAS-SN)z=
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   Binning factor: (rounded to nearest integer >1)
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Spectra
SelectIDObs-date (UT)Tel / InstExp-TimeObserver/sReducer/sGroupSpectrum ascii fileSpectrum fits fileSpec. TypeAssoc. GroupsEnd prop. periodRemarks
16542018-01-14 12:53:02FLWO-1.5m / FASTM. CalkinsASAS-SN tns_2018gk_2458133.0368287_FLWO_1.5m_FAST_ASAS-SN.txt tns_2018gk_2458133.0368287_FLWO_1.5m_FAST_ASAS-SN.fitsObjectASAS-SN
Light Curves
FilterTel / InstObs-date rangePhotometry
V-JohnsonASASSN-1_Brutus2018-01-10 15:36:00 - 2018-01-13 15:21:362
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
247232018-01-13 15:21:3616.6VegaMagV-JohnsonASASSN-1_Brutus
247222018-01-10 15:36:0017.8VegaMagV-JohnsonASASSN-1_Brutus[Last non detection]
G-GaiaGaia_Gaia-photometric2017-12-10 22:00:28 - 2018-01-17 03:37:262
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
248242018-01-17 03:37:2616.240.2ABMagG-GaiaGaia_Gaia-photometric60Robot
248232017-12-10 22:00:2821.5ABMagG-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
165362018-01-18 10:52:44Gaia_Bot1A. Delgado, D. Harrison, S. Hodgkin, M. van Leeuwen, G. Rixon, A. Yoldas (University of Cambridge), on behalf of Gaia Alerts teamGaiaAlerts16:35:54.060+40:01:58.012018-01-17 03:37:2616.24G-GaiaPSNGaia18aegGaiaAlertsconfirmed SN II near starburst galaxy SDSS J163554.35+400151.4, aka SN2018gk
164852018-01-14 14:07:22KZStanekJ. Brimacombe, G. Stone, K. Z. Stanek, for the ASAS-SN teamASAS-SN16:35:53.909+40:01:57.792018-01-13 15:21:3616.6V-JohnsonPSNASASSN-18amASAS-SNConfirmed by J. Brimacombe and G. Stone
Classification Reportings
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarks
16492018-01-17 00:37:22jlprietoE. Falco, M. Calkins (Harvard CfA), J. L. Prieto (UDP/MAS), K. Z. Stanek (OSU) ASAS-SNSN IIASAS-SNWe report optical spectroscopic observations of the ASAS-SN transients ASASSN-18am/AT2018gk, ASASN-18ao/AT2018gm, and ASASSN-18ap/AT2018gn (ATel #11178), obtained on UT 2018 Jan 14-16 with FAST (range 3600-7450 Angstroms) mounted on the F. L. Whipple Observatory 1.5-m telescope. We used SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) to aid with the type, phase and redshift determination. ASASSN-18am has a blue continuum, relatively weak and broad H-alpha (FWHM ~ 5000 km/s), and strong He II in emission (narrow and broad features), consistent with a young Type II SN.

Comments

Object coordinates updated according to AT-report 16536 of Group GaiaAlerts
Previous RA, DEC: 16:35:53.909, +40:01:57.79 (248.97462, +40.03272)
Updated RA, DEC: 16:35:54.060, +40:01:58.01 (248.97525, 40.032781)