RA/DEC (2000)
09:01:17.374 +18:36:07.73
135.322392 +18.602147
Type
---
Redshift
0.19
Discovery ReportClassification Report
Related AstroNotes: 2026-36, 2026-38, 2026-152
Reporting Group
SGLF
Discovering Data Source
ZTF
Discovery Date
2026-02-14 08:23:00.000
TNS AT
Y
Public
Y
Host Name
SDSS J090117.42+183606.5
Discovery Mag
18.68
Filter
g-ZTF
Reporter/s
I. Pérez-Fournon (IAC and ULL), D. Cano-Morales, I. Correa-Plasencia, A.E. Hernández-Díaz, E. Lekaroz-Urriza, M. Quintana-Ansaldo (ULL), F. Poidevin (IAC and ULL), C. Jiménez Ángel (GRANTECAN), R. Shirley (MPE), R. Marques-Chaves (Univ. of Geneva), and S. Geier (GRANTECAN & IAC) on behalf of SGLF
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2026dbl - 2026-02-17 06:06:40 Keck1 / LRIS (ZTF)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
 ▌LAST_LAST-Cam_Clear
 ▌GOTO-N_GOTO-1_L
 ▌BG2_BlackGEM-Cam2_BG-i
 ▌P48_ZTF-Cam_i
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌ATLAS-HKO_ATLAS-02_orange
   
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
22994 2026-02-17 06:06:40 Keck1 / LRIS Wynn Jacobson-Galan Wynn Jacobson-Galan ZTF tns_2026dbl_2026-02-17_06-06-39.856_Keck1_LRIS_ZTF.spec Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2026-02-12 02:24:18 - 2026-02-12 02:24:18 2461083.60021 - 2461083.60021 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
558843 2026-02-12 02:24:18 2461083.60021 20.21 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot [Last non detection]
Clear- LAST_LAST-Cam 2026-02-07 19:39:14 - 2026-02-17 19:09:38 2461079.31891 - 2461089.29836 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
559148 2026-02-17 19:09:38 2461089.29836 19.57 ABMag Clear- LAST_LAST-Cam 400
559147 2026-02-07 19:39:14 2461079.31891 20.34 ABMag Clear- LAST_LAST-Cam 400 [Last non detection]
L-GOTO GOTO-N_GOTO-1 2026-02-11 22:11:54 - 2026-02-14 22:37:42 2461083.424928 - 2461086.442846 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
558671 2026-02-14 22:37:42 2461086.442846 18.67 0.08 ABMag L-GOTO GOTO-N_GOTO-1 180
558670 2026-02-11 22:11:54 2461083.424928 19.8 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
BG-i-BlackGem BG2_BlackGEM-Cam2 2025-12-29 05:20:15 - 2025-12-31 08:18:15 2461038.7223958 - 2461040.8460069 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
586045 2025-12-31 08:18:15 2461040.8460069 17.27 0.04 19.26 ABMag BG-i-BlackGem BG2_BlackGEM-Cam2 60 robotic
586044 2025-12-29 05:20:15 2461038.7223958 19.19 ABMag BG-i-BlackGem BG2_BlackGEM-Cam2 60 robotic [Last non detection]
i-ZTF P48_ZTF-Cam 2026-02-14 09:09:35 - 2026-02-14 09:09:35 2461085.8816551 - 2461085.8816551 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
559886 2026-02-14 09:09:35 2461085.8816551 19.57 0.198 ABMag i-ZTF P48_ZTF-Cam 30 ZTFbot
r-ZTF P48_ZTF-Cam 2026-02-09 07:38:47 - 2026-02-14 08:59:12 2461080.8185995 - 2461085.8744444 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
559885 2026-02-14 08:59:12 2461085.8744444 19.191 0.103 ABMag r-ZTF P48_ZTF-Cam 30 ZTFbot
558310 2026-02-09 07:38:47 2461080.8185995 20.623 ABMag r-ZTF P48_ZTF-Cam 30 ZTFbot [Last non detection]
559884 2026-02-09 07:38:47 2461080.8185995 20.623 ABMag r-ZTF P48_ZTF-Cam 30 ZTFbot [Last non detection]
g-ZTF P48_ZTF-Cam 2026-02-14 08:23:00 - 2026-02-14 08:23:00 2461085.8493056 - 2461085.8493056 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
558311 2026-02-14 08:23:00 2461085.8493056 18.68 0.097 ABMag g-ZTF P48_ZTF-Cam 30 ZTFbot
orange-ATLAS ATLAS-HKO_ATLAS-02 2026-02-14 10:11:38 - 2026-02-14 10:11:38 2461085.92475 - 2461085.92475 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
558844 2026-02-14 10:11:38 2461085.92475 18.971 0.139 19.37 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 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
305586 2026-05-27 14:24:31 BlackGEM_Bot1 H. Tranin, F. Stoppa, D. Pieterse et al. BlackGEM BlackGEM 09:01:17.381 +18:36:07.24 2025-12-31 08:18:15.000 17.27 BG-i-BlackGem PSN BGEM J090117.38+183607.2 BlackGEM N
292143 2026-02-21 18:19:03 Ismael Perez-Fournon I. Pérez-Fournon (IAC and ULL), D. Cano-Morales, I. Correa-Plasencia et al. SGLF ZTF 09:01:17.374 +18:36:07.73 2026-02-14 08:59:12.000 19.191 r-ZTF PSN ZTF26aaglqak ZTF ZTF early detections of AT 2026dbl / ZTF26aaglqak in ZTF r&i bands N
291698 2026-02-17 19:36:47 LAST_Bot1 R. Konno (WIS), E. A. Zimmerman (WIS), A. Horowicz (WIS) et al. LAST LAST 09:01:17.377 +18:36:07.95 2026-02-17 19:09:38.304 19.57 Clear- PSN LAST N
291515 2026-02-16 10:01:00 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 09:01:17.381 +18:36:08.03 2026-02-14 10:11:38.400 18.971 orange-ATLAS PSN ATLAS26bvv ATLAS N
291420 2026-02-15 13:15:23 GOTO_bot J. Lyman, K. Ackley, M. Dyer et al. GOTO GOTO 09:01:17.436 +18:36:07.87 2026-02-14 22:37:42.240 18.67 L-GOTO Other GOTO26ayi GOTO N
291251 2026-02-14 11:35:06 Ismael Perez-Fournon I. Pérez-Fournon (IAC and ULL), D. Cano-Morales, I. Correa-Plasencia et al. SGLF ZTF 09:01:17.374 +18:36:07.73 2026-02-14 08:23:00.000 18.68 g-ZTF PSN SDSS J090117.42+183606.5 ZTF26aaglqak ZTF SN candidate discovered using the public ZTF alerts, the LSST/ZTF brokers, and our SGLF filters. ZTF light curve available at the LSST/ZTF brokers, e.g.: https://lasair-ztf.lsst.ac.uk/objects/ZTF26aaglqak/ https://alerce.online/object/ZTF26aaglqak https://antares.noirlab.edu/loci/ANT2026b1ca1paa53x6 2026TNSTR.631....1P N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22993 2026-02-17 20:43:22 Jacob Wise Jacob Wise (LJMU), Wynn Jacobson-Galan (Caltech), Daniel Perley (LJMU), Anna Y. Q. Ho (Cornell), Zoe McGrath (LJMU), Aleksandra Bochenek (LJMU), K-Ryan Hinds (Caltech) ZTF Other 0.19 1 ZTF Spectrum displays a blue, featureless continuum with narrow Mg II doublet absorption at a redshift of z = 0.190 ± 0.001. Liverpool Telescope IO:O photometry shows the transient to have exceptionally blue colours at peak (u - g ~ 0.6) and a fading lightcurve shortly after discovery. A definitive classification cannot be confirmed at this time. Observations detailed further in AstroNote 2026-36. 2026TNSCR.691....1W
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
22994 2026-02-17 06:06:40 Keck1 / LRIS Wynn Jacobson-Galan Wynn Jacobson-Galan ZTF tns_2026dbl_2026-02-17_06-06-39.856_Keck1_LRIS_ZTF.spec Object

Comments