RA/DEC (2000)
09:13:38.170 +76:28:18.10
138.409042 +76.471694
Type
SN II
Redshift
0.004926
Discovery ReportClassification Report
Reporting Group
None
Discovering Data Source
None
Discovery Date
2026-08-09 19:16:43.000
TNS AT
Y
Public
Y
Host Name
NGC2748
Comments
[Object cross-matched with NGC2748]
Discovery Mag
15.4
Filter
Clear-
Reporter/s
Koichi Itagaki
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2026yly - 2026-08-18 05:22:59 LT / SPRAT (ZTF)z=
▌Show H at z=vexp= km/s
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▌Show Mg 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
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▌Show Galaxy lines at z=
▌Show WR-WN at z=vexp= km/s
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z-step:   v-step: 
   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 ▌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
24549 2026-08-18 05:22:59 LT / SPRAT Jacob Wise, Daniel Perley, Aleksandra Bochenek, Zoe McGrath, Yogesh Wagh, K-Ryan Hinds Jacob Wise ZTF tns_2026yly_2026-08-18_05-22-59.133_LT_SPRAT_ZTF.spec Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
Clear- Other_Other 2026-08-09 19:16:42 - 2026-08-20 01:00:00 2461262.3032639 - 2461272.5416667 6
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
613801 2026-08-20 01:00:00 2461272.5416667 17 ABMag Clear- Other_Other [Last non detection] (Samyang 135mm f/2 + ZWO ASI533MM Pro in R-band, and ZWO ASI585MM in Clear/L-band)
613802 2026-08-20 01:00:00 2461272.5416667 15.8 0.1 18 ABMag Clear- Other_Other Samyang 135mm f/2 + ZWO ASI533MM Pro in R-band, and ZWO ASI585MM in Clear/L-band
613803 2026-08-20 00:00:00 2461272.5 16 0.2 18 ABMag Clear- Other_Other 300
611726 2026-08-10 11:04:26 2461262.961412 15.34 0.1 18 VegaMag Clear- Other_Other 20 Yasuo Sano SCT 0.36-m F/11 reflector + FLI ML1001E CCD, Nayoro Hokkaido Japan
611555 2026-08-09 19:16:43 2461262.3032755 15.4 VegaMag Clear- Other_Other 0.35-m F/11 + CCD (KAF-1001E) unfiltered
611725 2026-08-09 19:16:42 2461262.3032639 18 VegaMag Clear- Other_Other 20 Yasuo Sano [Last non detection] Telescope:SCT 0.36-m F/11 reflector
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
320920 2026-08-21 02:15:27 Andrey Voronov Andrey Voronov, Alexey Baigashov, Pavel Vasiliev et al. 09:13:38.170 +76:28:18.10 2026-08-20 23:00:00.000 16 Clear- 1 PSN NGC 2748 IKBFU-DRSN135 Follow-up observation of AT 2026yly in NGC 2748. Dual-rig setup: 2× Samyang 135mm f/2 (stopped at f/4.5). Cameras: ZWO ASI533MM Pro (R filter) and ZWO ASI585MM (Clear). 20 frames × 300s. Mount: Juwel 14. Comparison with PanSTARRS archive confirms the absence of any object at this position prior to the discovery. Estimated current magnitude ~16.0m N
Related files
File Comments Last Modified (UT) Modified By
tns_2026yly_atrep_320920.jpg 2026-08-21 02:21:13 Andrey Voronov
320919 2026-08-20 23:54:27 Andrey Voronov Voronov Andrey, Baigashov Alexey, Vasiliev Pavel et al. 09:13:38.170 +76:28:18.10 2026-08-20 23:00:00.000 15.8 Clear- 1 PSN NGC 2748 DRSN135 2026-08-21 This is a follow-up confirmation of the known transient AT 2026yly in NGC 2748. The object was detected at magnitude ~16.0 V using a dual-camera setup (Samyang 135mm f/2 + ZWO ASI533MM Pro in R-band, and ZWO ASI585MM in Clear/L-band). It is absent in the PanSTARRS archive. Submitted by the IKBFU group (DRSN135) as a confirmation. N
Related files
File Comments Last Modified (UT) Modified By
tns_2026yly_atrep_320919.jpg 2026-08-20 23:54:29 Andrey Voronov
319837 2026-08-10 12:00:08 Yasuo Sano Yasuo Sano 09:13:38.170 +76:28:18.10 2026-08-09 19:16:43.000 15.34 Clear- 1 PSN Followup ovservation N
Related files
File Comments Last Modified (UT) Modified By
tns_2026yly_atrep_319837.jpg 2026-08-10 12:00:14 Yasuo Sano
319745 2026-08-10 02:13:43 Koichi Itagaki Koichi Itagaki 09:13:38.170 +76:28:18.10 2026-08-09 19:16:43.000 15.4 Clear- 1 PSN 2026TNSTR3247....1I N
Related files
File Comments Last Modified (UT) Modified By
tns_2026yly_atrep_319745.jpg 2026-08-10 02:13:44 Koichi Itagaki
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
24542 2026-08-20 16:24:43 Jacob Wise Jacob Wise (LJMU), Daniel Perley (LJMU), Aleksandra Bochenek (LJMU), Zoe McGrath (LJMU), Yogesh Wagh (LJMU), K-Ryan Hinds (Caltech) ZTF SN II 0.004926 1 ZTF Spectrum shows an emerging broad H-alpha P-Cygni feature, suggesting a SN II classification. NGC 2748 redshift of z = 0.004926 from Kourkchi et al. (2020). 2026TNSCR3404....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
24549 2026-08-18 05:22:59 LT / SPRAT Jacob Wise, Daniel Perley, Aleksandra Bochenek, Zoe McGrath, Yogesh Wagh, K-Ryan Hinds Jacob Wise ZTF tns_2026yly_2026-08-18_05-22-59.133_LT_SPRAT_ZTF.spec Object

Comments