RA/DEC (2000)
22:09:38.730 +17:39:40.39
332.411375 +17.661219
Type
SN Ia-91T-like
Redshift
0.027
Discovery ReportClassification Report
Reporting Group
ASAS-SN
Discovering Data Source
ASAS-SN
Discovery Date
2017-11-02 04:33:36.000
TNS AT
Y
Public
Y
Host Name
KUG 2207+174
Host Redshift
0.026852
Discovery Mag
16.7
Filter
g-Sloan
Reporter/s
D. Bersier, K. Z. Stanek, for the ASAS-SN team
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2017htb - 2017-11-06 12:00:00 Lijiang-2.4m / YFOSC (None)z=
 ▌SN_2017htb - 2017-11-05 20:03:41 Other / Other (None)z=
 ▌SN_2017htb - 2017-11-05 20:03:41 Other / Other (None)z=
▌Show H at z=vexp= km/s
▌Show He at z=vexp= km/s
▌Show He II at z=vexp= km/s
▌Show C II at z=vexp= km/s
▌Show C III at z=vexp= km/s
▌Show C IV at z=vexp= km/s
▌Show N II at z=vexp= km/s
▌Show N III at z=vexp= km/s
▌Show N IV at z=vexp= km/s
▌Show N V 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 O V at z=vexp= km/s
▌Show O VI 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 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)

Light curves

 ▌ASASSN-4_Leavitt_g
 ▌Gaia_Gaia-photometric_G
 ▌PS1_GPC1_i
   
Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)
Spectra
 ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
1399 2017-11-06 12:00:00 Lijiang-2.4m / YFOSC 1200 Jujia Zhang None tns_2017htb_2017-11-06.5_LJT_YFOSC.dat Object
1397 2017-11-05 20:03:41 Other / Other 3607 R Leadbeater R Leadbeater None tns_2017htb_2017-11-05_20-03-41_Other_Other.dat tns_2017htb_2017-11-05_20-03-41_Other_Other.fit Object R~150 spectrum obtained using modified ALPY spectrograph at Three Hills Observatory as described here http://www.threehillsobservatory.co.uk/astro/spectroscopy_20.htm. Revised version (improved wavelength calibration, SNR. Host Galaxy contribution removed)
1396 2017-11-05 20:03:41 Other / Other 1803 R Leadbeater R Leadbeater None tns_2017htb_2458063.3359_Other_Other.dat tns_2017htb_2458063.3359_Other_Other.fit Object R~150 spectrum obtained using modified ALPY spectrograph at Three Hills Observatory as described here http://www.threehillsobservatory.co.uk/astro/spectroscopy_20.htm
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
g-Sloan ASASSN-4_Leavitt 2017-10-26 01:55:12 - 2017-11-02 04:33:36 2458052.58 - 2458059.69 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
21709 2017-11-02 04:33:36 2458059.69 16.7 ABMag g-Sloan ASASSN-4_Leavitt
21708 2017-10-26 01:55:12 2458052.58 18.6 ABMag g-Sloan ASASSN-4_Leavitt [Last non detection]
G-Gaia Gaia_Gaia-photometric 2017-10-15 15:36:00 - 2017-10-25 15:41:45 2458042.15 - 2458052.1539931 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
21715 2017-10-25 15:41:45 2458052.1539931 18.39 0.2 ABMag G-Gaia Gaia_Gaia-photometric 60 Robot
21714 2017-10-15 15:36:00 2458042.15 21.5 ABMag G-Gaia Gaia_Gaia-photometric Robot [Last non detection]
i-P1 PS1_GPC1 2017-11-05 07:07:40 - 2017-11-05 07:07:40 2458062.7969907 - 2458062.7969907 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
22073 2017-11-05 07:07:40 2458062.7969907 16.76 0.02 20.7 ABMag i-P1 PS1_GPC1 45 Robot
AT Reports
ID Time received (UT) Sender Reporter/s Reporting group Disc. Data Source RA DEC Discovery date (UT) Discovery Mag. Filter Related files AT Type Host name Internal name Assoc. Groups End prop. period Remarks ADS Bibcode Unreal Auto classification
14649 2017-11-14 00:28:31 PS1_Bot1 K. C. Chambers, M. E. Huber, H. Flewelling et al. Pan-STARRS Pan-STARRS 22:09:38.728 +17:39:40.44 2017-11-05 07:07:40.000 16.76 i-P1 PSN PS17eyx Pan-STARRS N
14416 2017-11-03 12:12:44 Gaia_Bot1 A. Delgado, D. Harrison, S. Hodgkin et al. GaiaAlerts GaiaAlerts 22:09:38.730 +17:39:40.39 2017-10-25 15:41:45.000 18.39 G-Gaia PSN Gaia17csl GaiaAlerts candidate SN near galaxy 2MASX J22093900+1739415, GS-TEC predicts SN Ia, aka AT2017htb 2017TNSTR1204....1D N
14413 2017-11-03 11:52:46 Krzysztof Stanek D. Bersier, K. Z. Stanek, for the ASAS-SN team ASAS-SN ASAS-SN 22:09:38.690 +17:39:40.10 2017-11-02 04:33:36.000 16.7 g-Sloan PSN KUG 2207+174 ASASSN-17oc ASAS-SN In two epochs; first SN candidate from the new "Henrietta Leavitt" telescope 2017TNSTR1203....1B N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
1395 2017-11-07 02:55:38 Jujia Zhang Jujia Zhang, Kai Ye (YNAO) and Xiaofeng Wang (Tsinghua University)
 None SN Ia-91T-like 0.027 1 The spectrum matches a 91T like SN Ia at a few days before maximum, e.g., SN 2007S = -4 days. 2017TNSCR1552....1Z
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
1399 2017-11-06 12:00:00 Lijiang-2.4m / YFOSC 1200 Jujia Zhang None tns_2017htb_2017-11-06.5_LJT_YFOSC.dat Object
1393 2017-11-06 02:49:39 Robin Leadbeater Robin Leadbeater None SN Ia-91T-like 0.027 1 Classification using SNID ( Blondin, S. & Tonry, J. L. 2007. ApJ, 666, 1024) predicts a type 1a (sub type 91T) supernova a few days pre maximum. 2017TNSCR1551....1L
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
1397 2017-11-05 20:03:41 Other / Other 3607 R Leadbeater R Leadbeater None tns_2017htb_2017-11-05_20-03-41_Other_Other.dat tns_2017htb_2017-11-05_20-03-41_Other_Other.fit Object R~150 spectrum obtained using modified ALPY spectrograph at Three Hills Observatory as described here http://www.threehillsobservatory.co.uk/astro/spectroscopy_20.htm. Revised version (improved wavelength calibration, SNR. Host Galaxy contribution removed)
1392 2017-11-05 21:57:04 Robin Leadbeater Robin Leadbeater None SN Ia 1 1 Classification using SNID ( Blondin, S. & Tonry, J. L. 2007. ApJ, 666, 1024) predicts a type 1a supernova a few days pre maximum. The sub-type is uncertain but the best fit is to a type 91-T 2017TNSCR1218....1L
Related files
File Comments Last Modified (UT) Modified By
tns_2017htb_classrep_1392.ps SNID best fit 2017-11-05 21:57:05 Robin Leadbeater
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
1396 2017-11-05 20:03:41 Other / Other 1803 R Leadbeater R Leadbeater None tns_2017htb_2458063.3359_Other_Other.dat tns_2017htb_2458063.3359_Other_Other.fit Object R~150 spectrum obtained using modified ALPY spectrograph at Three Hills Observatory as described here http://www.threehillsobservatory.co.uk/astro/spectroscopy_20.htm

Comments

Ofer
Yaron

Sun, 11/05/2017 - 06:34

Gaia report for 2017hte was associated with this object - 2017ht

The coordinates of this object - 2017htb - were updated according to the coordinates reported by Gaia, and object 2017hte was removed.