RA/DEC (2000)
15:15:57.226 +56:18:32.09
228.9884428 +56.3089141
Type
SN II
Redshift
0.0017
Discovery ReportClassification Report
Related AstroNotes: 2026-114
Reporting Group
None
Discovering Data Source
None
Discovery Date
2026-04-22 14:23:47.000
TNS AT
Y
Public
Y
Host Name
NGC5907
Discovery Mag
16.62
Filter
Clear-
Reporter/s
Yasuo Sano
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2026kid - 2026-04-23 07:11:44 MMT / BINOSPEC (ZTF)z=
 ▌SN_2026kid - 2026-04-22 17:35:11 XLT / BFOSC (AUTOGLASS)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

 ▌ATLAS-TDO_ATLAS-05_wide
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌ATLAS-HKO_ATLAS-02_orange
 ▌Other_Other_Clear
   
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
23546 2026-04-23 07:11:44 MMT / BINOSPEC MMT Queue Observers ZTF tns_2026kid_2461153.79982000_MMT_BINOSPEC_ZTF.ascii Object
23536 2026-04-22 17:35:11 XLT / BFOSC 1800 Yiming Mao, Jie Zheng, Sen Liu, Yifei Zhang, Tongyu Liu, Junjie Jin, Hong Wu Yiming Mao AUTOGLASS tns_2026kid_2026-04-22_17-35-11_XLT_BFOSC_AUTOGLASS.DAT Object 2026-04-22 We suggest that this object may be a Type II SN with Hα emission.
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2026-04-23 00:49:25 - 2026-04-23 00:49:25 2461153.53432 - 2461153.53432 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
577104 2026-04-23 00:49:25 2461153.53432 16.491 0.023 19.83 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot
r-ZTF P48_ZTF-Cam 2026-04-21 08:58:51 - 2026-04-23 09:20:17 2461151.8742014 - 2461153.8890856 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
577125 2026-04-23 09:20:17 2461153.8890856 15.9264 0.0342784 ABMag r-ZTF P48_ZTF-Cam
577124 2026-04-21 08:58:51 2461151.8742014 18.7396 0.0963716 ABMag r-ZTF P48_ZTF-Cam
g-ZTF P48_ZTF-Cam 2026-04-21 07:58:26 - 2026-04-21 07:58:26 2461151.8322454 - 2461151.8322454 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
577123 2026-04-21 07:58:26 2461151.8322454 20.6402 ABMag g-ZTF P48_ZTF-Cam [Last non detection]
orange-ATLAS ATLAS-HKO_ATLAS-02 2026-04-06 15:21:57 - 2026-04-06 15:21:57 2461137.14024 - 2461137.14024 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
577103 2026-04-06 15:21:57 2461137.14024 17.59 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot [Last non detection]
Clear- Other_Other 2026-04-22 14:22:47 - 2026-04-23 14:55:06 2461153.0991551 - 2461154.1215972 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
577332 2026-04-23 14:55:06 2461154.1215972 16.23 0.15 VegaMag Clear- Other_Other 120 Jiashuo Zhang
576893 2026-04-22 14:22:47 2461153.0991551 19 VegaMag Clear- Other_Other 30 Yasuo Sano [Last non detection] Telescope:0.36-m F/11 reflector
576894 2026-04-22 14:22:47 2461153.0991551 16.62 0.1 19 VegaMag Clear- Other_Other 30 Yasuo Sano SCT 0.36-m F/11 reflector + FLI ML1001E CCD, Nayoro Hokkaido Japan
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
301179 2026-04-23 16:16:32 jiashuo Zhang Jiashuo Zhang STSP STSP 15:15:57.226 +56:18:32.09 2026-04-23 14:55:06.000 16.23 Clear- 1 PSN STSP At UTC 2026-04-23 14:55:06, the target was clearly visible in a single 120-second exposure. Its brightness was approximately magnitude 16.23. Further observations are encouraged to confirm the nature of this object. N
Related files
File Comments Last Modified (UT) Modified By
tns_2026kid_atrep_301179_STSP.png AT 2026kid 2026-04-23 16:16:32 jiashuo Zhang
301066 2026-04-23 09:40:27 Fritz Nabeel Rehemtulla (CIERA, NU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 15:15:57.226 +56:18:32.09 2026-04-21 08:58:51.000 18.7396 r-ZTF PSN ZTF26aatswhm ZTF Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167). N
301059 2026-04-23 08:22:07 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 15:15:57.211 +56:18:32.20 2026-04-23 00:49:25.248 16.491 wide-ATLAS PSN ATLAS26equ ATLAS N
300955 2026-04-22 14:49:22 Yasuo Sano Yasuo Sano 15:15:57.190 +56:18:32.70 2026-04-22 14:23:47.000 16.62 Clear- PSN NGC5907 2026TNSTR1769....1S N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
23543 2026-04-23 19:02:51 Nabeel Rehemtulla Nabeel Rehemtulla (NU, CIERA), Wynn Jacobson-Galán (Caltech) and Chang Liu (NU, CIERA) on behalf of the ZTF Collaboration ZTF SN II 0.0017 1 ZTF Very likely SN II with strong CSM interaction and substantial host reddening. Exhibits He II 4686, C IV 5801 & 5812, N IV 7115. Monitoring of these features is necessary to definitively rule out SN IIn. 2026TNSCR1797....1R
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
23546 2026-04-23 07:11:44 MMT / BINOSPEC MMT Queue Observers ZTF tns_2026kid_2461153.79982000_MMT_BINOSPEC_ZTF.ascii Object
23533 2026-04-22 19:50:46 Yiming Mao Yiming Mao AUTOGLASS SN II 0.002 1 AUTOGLASS 2026-04-23 2026TNSCR1809....1M
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
23536 2026-04-22 17:35:11 XLT / BFOSC 1800 Yiming Mao, Jie Zheng, Sen Liu, Yifei Zhang, Tongyu Liu, Junjie Jin, Hong Wu Yiming Mao AUTOGLASS tns_2026kid_2026-04-22_17-35-11_XLT_BFOSC_AUTOGLASS.DAT Object 2026-04-22 We suggest that this object may be a Type II SN with Hα emission.

Comments

Patrick
Wiggins

Wed, 04/29/2026 - 03:45

(No subject)

22 April 2026 at 05:46:21 UT from IAU 718

5907.jpg
Yasuo
Sano

Fri, 04/24/2026 - 08:40

Photometric observation

The lights were on

SN2026kid 2026/04/22 14h23m +16.62C
SN2026kid 2026/04/23 10h40m +16.08C
SN2026kid 2026/04/23 11h05m +16.94B
SN2026kid 2026/04/23 11h07m +15.89V
SN2026kid 2026/04/23 11h06m +15.56Rc

SCT-0.36m FL3950mm F11, CCD  FLI ML1001E,  30sec
Comparison star: UCAC4
Photometry software: Astrorat9 (SP3)
Photometry software: MIRA Pro 64

TNS
System

Thu, 04/23/2026 - 09:40

Object coordinates updated

Object coordinates updated according to AT-report 301066 of Group ZTF
Previous RA, DEC: 15:15:57.211, +56:18:32.20 (228.988377778, +56.3089444444)
Updated RA, DEC: 15:15:57.226, +56:18:32.09 (228.9884428, +56.3089141)

TNS
System

Thu, 04/23/2026 - 08:22

Object coordinates updated

Object coordinates updated according to AT-report 301059 of Group ATLAS
Previous RA, DEC: 15:15:57.190, +56:18:32.70 (228.988292, +56.309083)
Updated RA, DEC: 15:15:57.211, +56:18:32.20 (228.988377778, +56.3089444444)