SN 2018etm
RA/DEC (2000)
16:14:20.679 +03:13:55.08
243.586161 +3.231966
Type
SN Ia
Redshift
0.02
Source Group
ATLAS
Discovery Date
2018-08-08 08:13:55
TNS AT
Y
Public
Y
Discovery Mag
18.4
Filter
cyan-ATLAS
Discoverer/s
J. Tonry, B. Stalder, L. Denneau, A. Heinze, H. Weiland (IfA, University of Hawaii), A. Rest (STScI), K. W. Smith, S. J. Smartt, D. R. Young, M. Fulton, O. McBrien, D. O'Neill, P. Clark (Queen's University Belfast)

Spectra

 SN_2018etm - 2018-08-11 18:58:19 UH88 / SNIFS (SCAT)z=
Show H at z=vexp= km/s
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Show [O III] at z=vexp= km/s
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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
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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),0 (observed)
Spectra
SelectIDObs-date (UT)Tel / InstExp-TimeObserver/sReducer/sGroupSpectrum ascii fileSpectrum fits fileSpec. TypeAssoc. GroupsEnd prop. periodRemarks
24852018-08-11 18:58:19UH88 / SNIFS1200M.A.TuckerSCAT tns_2018etm_2458342.2905_UH88_SNIFS_SCAT.datSCATReduced using a summit quick-reduction pipeline, care should be taken before re-using this spectrum for further studies.
Light Curves
FilterTel / InstObs-date rangePhotometry
cyan-ATLASATLAS1_ACAM12018-08-08 08:13:55 - 2018-08-08 08:13:551
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
333552018-08-08 08:13:5518.40.05119.65ABMagcyan-ATLASATLAS1_ACAM130Robot
orange-ATLASATLAS1_ACAM12018-08-06 08:44:09 - 2018-08-06 08:44:091
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
333542018-08-06 08:44:0919.3ABMagorange-ATLASATLAS1_ACAM130Robot[Last non detection]
G-GaiaGaia_Gaia-photometric2018-03-19 01:58:04 - 2018-08-12 21:37:262
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
338372018-08-12 21:37:2617.280.2ABMagG-GaiaGaia_Gaia-photometric60Robot
338362018-03-19 01:58:0421.5ABMagG-GaiaGaia_Gaia-photometricRobot[Last non detection]
g-ZTFP48_ZTF-Cam2018-08-07 04:23:31 - 2018-08-13 04:03:212
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
338502018-08-13 04:03:2117.05ABMagg-ZTFP48_ZTF-Cam30ZTF
338492018-08-07 04:23:3119.07ABMagg-ZTFP48_ZTF-Cam30ZTF
r-ZTFP48_ZTF-Cam2018-07-13 05:02:24 - 2018-07-13 05:02:241
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
338482018-07-13 05:02:2420.56ABMagr-ZTFP48_ZTF-Cam30ZTF[Last non detection]
AT Reportings
IDTime received (UT)SenderReporter/s (Discoverer/s)GroupRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
216412018-08-14 21:24:21ZTF_Bot1C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF) collaborationZTF16:14:20.682+03:13:55.022018-08-07 04:23:3119.07g-ZTFPSNZTF18abltdkdZTF
216352018-08-14 17:11:36Gaia_Bot1A. Delgado, D. Harrison, S. Hodgkin, M. van Leeuwen, G. Rixon, A. Yoldas (University of Cambridge), on behalf of Gaia Alerts teamGaiaAlerts16:14:20.680+03:13:55.092018-08-12 21:37:2617.28G-GaiaPSNGaia18cedGaiaAlertsconfirmed SN Ia, aka SN 2018etm
213662018-08-08 17:55:04ATLAS_Bot1J. Tonry, B. Stalder, L. Denneau, A. Heinze, H. Weiland (IfA, University of Hawaii), A. Rest (STScI), K. W. Smith, S. J. Smartt, D. R. Young, M. Fulton, O. McBrien, D. O'Neill, P. Clark (Queen's University Belfast)ATLAS16:14:20.679+03:13:55.082018-08-08 08:13:5518.4cyan-ATLASPSNATLAS18thtATLAS
Classification Reportings
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarks
25022018-08-13 16:05:13ZTF_Bot1C. Fremling, A. Dugas, Y. Sharma (Caltech) on behalf of the Zwicky Transient Facility (ZTF)ZTFSN Ia0.02ZTF
24782018-08-12 09:05:49tuckermaMichael A. Tucker, Benjamin J. Shappee (IfA, UH Manoa)SCATSN Ia0.026SCATSN Ia near maximum light (SNID phase -1 +/- 8), host galaxy unclear. Straddles 2 SDSS galaxies (http://skyserver.sdss.org/dr13/en/tools/chart/navi.aspx?opt=G&ra=243.586166667&dec=3.23196666667&scale=0.1), matches photoZ at ~2.7sigma for upper right galaxy but inconsistent with other possible host (photoZ > 0.5). SNID redshift = 0.026 +/- 0.006.

Comments

As noted by Michael Tucker - This object sits between 2 SDSS galaxies, which have z ~ 0.1, 0.5, and the SNID z is 0.026, consistent with the lower redshift galaxy. (With the higher z distance modulus, this is an absolute mag of ~-24.)