SN 2018cow
RA/DEC (2000)
16:16:00.223 +22:16:04.83
244.000927647 +22.2680094118
Type
SN Ic-BL
Redshift
---
Source Group
ATLAS
Discovery Date
2018-06-16 10:35:02
TNS AT
Y
Public
Y
Discovery Mag
14.739
Filter
orange-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
No Data
Light Curves
FilterTel / InstObs-date rangePhotometry
orange-ATLASATLAS1_ACAM12018-06-12 11:45:36 - 2018-06-16 10:35:022
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
302132018-06-16 10:35:0214.7390.00919.37ABMagorange-ATLASATLAS1_ACAM130Robot
302122018-06-12 11:45:3619.35ABMagorange-ATLASATLAS1_ACAM130Robot[Last non detection]
G-GaiaGaia_Gaia-photometric2018-05-02 18:25:55 - 2018-06-22 16:46:332
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
307812018-06-22 16:46:3315.210.2ABMagG-GaiaGaia_Gaia-photometric60Robot
307802018-05-02 18:25:5521.5ABMagG-GaiaGaia_Gaia-photometricRobot[Last non detection]
r-ZTFP48_ZTF-Cam2018-06-13 07:35:02 - 2018-06-22 06:34:333
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
305702018-06-22 06:34:3315.16ABMagr-ZTFP48_ZTF-Cam30ZTF
305692018-06-19 07:09:0714.2ABMagr-ZTFP48_ZTF-Cam30ZTF
305682018-06-13 07:35:0220.22ABMagr-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
197582018-06-29 14:32:20Gaia_Bot1A. Delgado, D. Harrison, S. Hodgkin, M. van Leeuwen, G. Rixon, A. Yoldas (University of Cambridge), on behalf of Gaia Alerts teamGaiaAlerts16:16:00.220+22:16:04.912018-06-22 16:46:3315.21G-GaiaPSNGaia18bqaGaiaAlertsconfirmed SN Ic-BL SN 2018cow
196642018-06-22 20:48:26ZTF_Bot1C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF) collaborationZTF16:16:00.227+22:16:04.882018-06-19 07:09:0714.2r-ZTFPSNZTF18abcfcooZTF
194822018-06-17 15:23:22ATLAS_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)ATLAS16:16:00.223+22:16:04.832018-06-16 10:35:0214.739orange-ATLASPSNATLAS18qqnATLAS
Classification Reportings
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarks
21802018-06-22 23:58:53ZTF_Bot1C. Fremling, Y. Sharma (Caltech) on behalf of the Zwicky Transient Facility (ZTF)ZTFSN Ic-BLZTF

Comments

We observed SN2018cow from 2018-7-22 to 2018-8-5

We observed SN 2018cow on 2018cow on 2018-07-18.035

V = 17.97 +/- 0.09

Cheers,
Malhar R. Kendurkar

Light Curves of AT 2018cow from 2018-06-18 to 2018-07-17

Cheers,
Malhar R. Kendurkar

AT 2018cow taken last night (06/26/2018) from Caceres (Spain).

Light curve (23 points) of SN 2018cow in V band taken from Cáceres (Spain).

AT 2018cow taken last night (06/25/2018) from Caceres (Spain).

Follow up observations of SN 2018cow on 2018-06-23.
R = 14.66 +/- 0.01

Supernova? AT 2018cow taken last night (21-06-2018) from Caceres (Spain). HJD: 2458290.61348 ; magnitude V: 14.550 +/- 0.012 ; S/N: 90

Observations of SN 2018cow on 2018-06-20.016 from Teide Observatory, Spain.
R = 14.2 +/- 0.2

Transient 2018cow, PGC57660 and stars.

Transient 2018cow and the galaxy PGC57660, 20-06-2018: magnitude 13.95 V.

Observations of AT 2018cow on 2018-06-18.933 from Teide Observatory, Spain.
R = 13.98 +/- 0.2

T-0.51m f/4 , CCD ST9XE , exp 1x6" , Observatory L'Ametlla del Vallès (Spain) . Antonio Garrigós Sánchez, R13.9 2018 06 18.94657
Johnson B 13.6
Johnson V 13.8
Johnson R 13.9
Johnson I 14.6

Johnson I 14.6

T-0.51m f/4 , CCD ST9XE , exp 1x6" , Observatory L'Ametlla del Vallès (Spain) . Antonio Garrigós Sánchez, R13.9 2018 06 18.94657
Johnson B 13.6
Johnson V 13.8
Johnson R 13.9
Johnson V 14.6

Observaroy L' Ametlla del Vallés (Spain) T-0.51m , CCD ST9XE ,
In the temporal window of the observations, no variation is observed within 0.012 mag.

This morning (19-06-2018) I have taken some spectra of the object: it is very blue and seems to continue around the magnitude determined yesterday. I can appreciate a strong asymmetry in its spectral profile: in the Spectral Distribution of Energy the maximum is in the blue sector, as can be seen in the attached image.

Image taken by Victor R. Ruiz using the remote T5 iTelescope (USA) shows the transient very bright at 13,71 V mag. Attached image and photometry report.

Calibrated-T05-vrruiz-sn2018cow-20180617-043915-V-BIN1-W-060-001.fit
2458287.94442 20180618.44442
Johnson V
Calibration Stars from UCAC4 (V)

C CAL-1 14982 12.46 22.95
C CAL-2 38518 11.37 22.89
V VAR-1 4644 13.71

*** Resumen ***
VAR-1 2458287.94442 20180618.44442 13.71 Johnson V

I upload the image of the possible supernova. J. Camarasa B49

AT 2018cow: RA, DEC and V magnitude from "Astrometrica", 18-06-2018.

Transient (supernova?) AT 2018cow last night from Caceres (Spain), 18-06-2018.