Showing results 1 to 6 out of 6
AstroNote 2026-238
Type: Object/s-Data/Analysis
Released: 2026-08-05 02:04:08
Identification of Transient Precursors and Late-Time Rebrightening/Flattening in LSST EDP2
Yize Dong (Harvard/CfA), V. Ashley Villar (Harvard/CfA), Ryan J. Foley (UCSC), Qinan Wang (MIT), Gautham Narayan (UIUC/…
Source Group: VHU-TDA
Keywords: Spectroscopy, Transient, Supernova, TDE, Optical
Related Objects:
2017hcc
RA, DEC:00:03:50.590, -11:28:28.60
(0.960792, -11.474611)
Redshift:0.0173
Type:SN IIn
See object 2017hcc
,
2019iid
RA, DEC:12:20:31.469, +06:01:48.69
(185.131120, 6.030193)
Redshift:0.1
Type:SN Ia
See object 2019iid
,
2019mav
RA, DEC:22:48:17.121, -02:49:07.24
(342.071338, -2.818677)
Redshift:0.077
Type:SN Ia
See object 2019mav
,
2020izc
RA, DEC:00:05:02.510, -07:06:03.02
(1.260458, -7.100839)
Redshift:0.012699
Type:SN II
See object 2020izc
,
2020jfv
RA, DEC:23:06:35.750, +00:36:43.60
(346.648958, 0.612111)
Redshift:0.01709
Type:SN IIb
See object 2020jfv
,
2020usa
RA, DEC:22:26:13.590, -02:16:06.71
(336.556625, -2.268531)
Redshift:0.263
Type:SLSN-II
See object 2020usa
,
2020zpf
RA, DEC:23:12:40.484, -11:56:02.05
(348.168683, -11.933902)
Redshift:0.1
Type:SN Ia
See object 2020zpf
,
2020zso
RA, DEC:22:22:17.130, -07:15:59.08
(335.571375, -7.266411)
Redshift:0.061
Type:TDE
See object 2020zso
,
2021qth
RA, DEC:20:11:38.926, -21:09:36.64
(302.912191, -21.160179)
Redshift:0.0805
Type:TDE
See object 2021qth
,
2021zon
RA, DEC:00:29:50.931, -06:28:24.46
(7.462213, -6.473462)
Redshift:0.044
Type:SN IIb
See object 2021zon
,
2022pul
RA, DEC:12:26:48.846, +08:26:55.32
(186.703526, 8.448701)
Redshift:0.003
Type:SN Ia
See object 2022pul
,
2022rvy
RA, DEC:00:17:35.392, -11:17:10.46
(4.397468, -11.286240)
Redshift:0.099
Type:SN Ia
See object 2022rvy
,
2023swf
RA, DEC:21:05:58.530, -14:50:30.34
(316.493875, -14.841761)
Redshift:0.024
Type:SN II
See object 2023swf
,
2024kce
RA, DEC:12:29:49.560, +08:12:48.49
(187.456500, 8.213469)
Redshift:0.003
Type:SN Ia-pec
See object 2024kce
,
2024lwa
RA, DEC:22:32:47.058, -09:26:49.23
(338.196074, -9.447009)
Redshift:0.05689
Type:SN II
See object 2024lwa
,
2025aawk
RA, DEC:00:25:33.678, +02:16:17.57
(6.390324, 2.271548)
Redshift:0.0778
Type:SN II
See object 2025aawk
,
2025uue
RA, DEC:00:20:05.076, +08:30:41.89
(5.021151, 8.511636)
Redshift:0.01874
Type:SN IIn
See object 2025uue
,
2026ejf
RA, DEC:04:04:37.779, -48:30:07.25
(61.157411, -48.502013)
Redshift:0.96
Type:SLSN-I
See object 2026ejf
,
2026fgl
RA, DEC:09:56:52.360, +03:28:11.71
(149.218165, 3.469919)
Redshift:0.164
Type:SN Ia
See object 2026fgl
,
2026gzf
RA, DEC:09:59:42.872, +00:25:06.38
(149.928635, 0.418438)
Redshift:0.0343
Type:SN Ic-BL
See object 2026gzf
,
2026muw
RA, DEC:21:23:29.961, -07:40:49.04
(320.874838, -7.680289)
Redshift:0.061582
Type:SN IIn
See object 2026muw
,
2026pag
RA, DEC:21:46:05.755, -08:58:40.30
(326.523977, -8.977861)
Redshift:0.081
Type:TDE
See object 2026pag
We report the identification of 8 candidate transient precursors and 13 transients exhibiting unusually long-lived emission, late-time light-curve flattening, or rebrightening in LSST EDP2 coadded im…
AstroNote 2026-203
Type: Object/s-Data/Analysis
Released: 2026-06-23 16:04:02
NuSTAR X-ray upper limit of 2026obc
Yize Dong (Harvard/CfA), Daichi Tsuna (Harvard/CfA), Ashley Villar (Harvard/CfA)
Source Group: VHU-TDA
Related Objects:
2026obc
RA, DEC:01:07:49.433, +41:59:43.39
(16.955971, 41.995386)
Redshift:0.0195
Type:SN Icn
See object 2026obc
We report the NuSTAR X-ray nondetection of SN 2026obc.
AstroNote 2026-84
Type: Object/s-Discovery/Classification
Released: 2026-03-26 00:31:45
Classification of LSST Transient 2026euq (LSST-P-DO-313963406691402058)
Yize Dong (Harvard/CfA), V. Ashley Villar (Harvard/CfA), Danielle Frostig(Harvard/CfA), Anya Nugent (Harvard/CfA), S. K…
Source Group: VHU-TDA
Keywords: Spectroscopy, Transient, Supernova, Optical
Related Objects:
2026euq [LSST-P-DO-313963406691402058]
RA, DEC:09:55:20.981, +03:12:45.99
(148.837421, 3.212775)
Redshift:0.26
Type:SN Ib
See object 2026euq [LSST-P-DO-313963406691402058]
We report the classification of 2026euq (LSST-P-DO-313963406691402058) as a Type Ib supernova at z ~ 0.26.
AstroNote 2026-72
Type: Object/s-Discovery/Classification
Released: 2026-03-16 13:11:41
SN 2026ejf / LSST-P-DO-313831458352922664: Spectroscopic classification as a hydrogen-poor superluminous supernova (SLSN-I)
V. Ashley Villar (Harvard/CfA), Kyle W. Davis (UCSC), Yize Dong (Harvard), Ryan J. Foley (UCSC )
Source Group: VHU-TDA
Keywords: Spectroscopy, Transient, Supernova, Optical
Related Objects:
2026ejf [313831458352922664]
RA, DEC:04:04:37.779, -48:30:07.25
(61.157411, -48.502013)
Redshift:0.96
Type:SLSN-I
See object 2026ejf [313831458352922664]
We report the spectroscopic classification of SN 2026ejf as a hydrogen-poor superluminous supernova (SLSN-I) at z ~ 1.
AstroNote 2026-50
Type: Object/s-Discovery/Classification
Released: 2026-02-26 01:15:42
Identification of Rubin Supernova Candidates with Superphot+
Kaylee de Soto (Harvard/CfA), Yize Dong (Harvard/CfA), Anya Nugent (Harvard/CfA), S. Karthik Yadavalli (Harvard/CfA), V…
Source Group: VHU-TDA
Keywords: Transient, Supernova, Optical
Related Objects:
2025alto
RA, DEC:10:00:56.454, +03:13:32.65
(150.235225, 3.225736)
Redshift:
Type:
See object 2025alto
,
2025altt
RA, DEC:04:16:51.717, -46:34:29.09
(64.215486, -46.574747)
Redshift:
Type:
See object 2025altt
,
2026dd
RA, DEC:04:17:08.193, -46:31:45.68
(64.284139, -46.529355)
Redshift:
Type:
See object 2026dd
,
2026eiy
RA, DEC:03:49:41.167, -48:16:09.46
(57.421528, -48.269294)
Redshift:
Type:
See object 2026eiy
,
2026ejh
RA, DEC:03:49:00.055, -49:21:12.37
(57.250227, -49.353435)
Redshift:
Type:
See object 2026ejh
,
2026ekf
RA, DEC:12:30:49.857, +08:16:26.15
(187.707737, 8.273932)
Redshift:0.15
Type:SN Ia
See object 2026ekf
,
2026elk
RA, DEC:03:59:32.690, -50:19:31.11
(59.886210, -50.325309)
Redshift:
Type:
See object 2026elk
,
2026ell
RA, DEC:04:09:49.358, -46:19:33.50
(62.455657, -46.325971)
Redshift:
Type:
See object 2026ell
,
2026elm
RA, DEC:10:03:03.622, +02:37:32.77
(150.765091, 2.625769)
Redshift:
Type:
See object 2026elm
,
2026eln
RA, DEC:04:20:28.469, -47:44:51.94
(65.118621, -47.747760)
Redshift:
Type:
See object 2026eln
,
2026elo
RA, DEC:04:04:01.969, -48:32:58.08
(61.008203, -48.549466)
Redshift:
Type:
See object 2026elo
,
2026elp
RA, DEC:04:13:28.434, -47:41:33.86
(63.368473, -47.692738)
Redshift:
Type:
See object 2026elp
,
2026elq
RA, DEC:04:09:29.096, -47:45:11.98
(62.371233, -47.753327)
Redshift:
Type:
See object 2026elq
,
2026elr
RA, DEC:04:03:45.664, -50:04:50.28
(60.940266, -50.080632)
Redshift:
Type:
See object 2026elr
,
2026els
RA, DEC:04:04:32.369, -47:41:15.60
(61.134871, -47.687667)
Redshift:
Type:
See object 2026els
,
2026elt
RA, DEC:04:16:41.868, -48:39:03.95
(64.174449, -48.651098)
Redshift:
Type:
See object 2026elt
,
2026elu
RA, DEC:04:13:03.235, -46:03:48.16
(63.263481, -46.063378)
Redshift:
Type:
See object 2026elu
,
2026elv
RA, DEC:04:10:55.096, -49:06:48.45
(62.729568, -49.113459)
Redshift:
Type:
See object 2026elv
,
2026elw
RA, DEC:04:09:10.463, -46:34:05.01
(62.293594, -46.568058)
Redshift:
Type:
See object 2026elw
,
2026elx
RA, DEC:04:09:24.476, -46:59:16.43
(62.351983, -46.987898)
Redshift:
Type:
See object 2026elx
,
2026ely
RA, DEC:03:51:32.835, -49:59:49.66
(57.886814, -49.997127)
Redshift:
Type:
See object 2026ely
,
2026elz
RA, DEC:04:04:14.743, -49:08:08.35
(61.061430, -49.135652)
Redshift:
Type:
See object 2026elz
,
2026ema
RA, DEC:04:15:50.670, -47:19:24.11
(63.961125, -47.323365)
Redshift:
Type:
See object 2026ema
,
2026emb
RA, DEC:04:02:01.756, -48:25:29.48
(60.507315, -48.424855)
Redshift:
Type:
See object 2026emb
,
2026emc
RA, DEC:04:18:06.971, -46:54:14.21
(64.529046, -46.903948)
Redshift:
Type:
See object 2026emc
,
2026emd
RA, DEC:03:54:26.229, -50:20:23.59
(58.609287, -50.339885)
Redshift:
Type:
See object 2026emd
,
2026eme
RA, DEC:10:05:40.884, +03:19:11.13
(151.420348, 3.319758)
Redshift:
Type:
See object 2026eme
,
2026emf
RA, DEC:04:08:34.014, -49:19:10.32
(62.141725, -49.319533)
Redshift:
Type:
See object 2026emf
,
2026emg
RA, DEC:04:09:43.790, -48:45:19.93
(62.432459, -48.755537)
Redshift:
Type:
See object 2026emg
,
2026emh
RA, DEC:03:52:57.147, -50:05:32.98
(58.238114, -50.092494)
Redshift:
Type:
See object 2026emh
,
2026emi
RA, DEC:03:49:29.412, -49:19:17.99
(57.372549, -49.321663)
Redshift:
Type:
See object 2026emi
,
2026emj
RA, DEC:03:50:06.576, -48:01:44.04
(57.527402, -48.028900)
Redshift:
Type:
See object 2026emj
,
2026emk
RA, DEC:10:03:17.165, +01:03:13.43
(150.821520, 1.053731)
Redshift:
Type:
See object 2026emk
,
2026eml
RA, DEC:04:20:19.344, -48:02:23.01
(65.080601, -48.039726)
Redshift:
Type:
See object 2026eml
,
2026emm
RA, DEC:04:07:17.954, -47:26:58.87
(61.824810, -47.449685)
Redshift:
Type:
See object 2026emm
,
2026emn
RA, DEC:03:51:38.671, -48:00:12.85
(57.911131, -48.003570)
Redshift:
Type:
See object 2026emn
,
2026emo
RA, DEC:04:10:20.238, -46:37:13.71
(62.584326, -46.620474)
Redshift:
Type:
See object 2026emo
,
2026emp
RA, DEC:04:14:05.757, -48:05:02.15
(63.523989, -48.083931)
Redshift:
Type:
See object 2026emp
,
2026emq
RA, DEC:03:58:42.421, -48:31:16.07
(59.676755, -48.521131)
Redshift:
Type:
See object 2026emq
,
2026emr
RA, DEC:03:50:12.826, -49:45:08.83
(57.553440, -49.752453)
Redshift:
Type:
See object 2026emr
,
2026ems
RA, DEC:03:55:24.975, -48:04:46.94
(58.854061, -48.079705)
Redshift:
Type:
See object 2026ems
,
2026emt
RA, DEC:04:08:32.442, -49:10:42.25
(62.135176, -49.178402)
Redshift:
Type:
See object 2026emt
We report 42 supernova candidates from the first night of Rubin alerts, with host galaxy associations and photometric classifications. We encourage spectroscopic follow-up of these candidates.
AstroNote 2025-332
Type: Object/s-Discovery/Classification
Released: 2025-12-02 01:23:03
Classification of Bright, Nearby Transients During Nov 21 and Nov 24
Yize Dong (Harvard/CfA), Anya Nugent (Harvard/CfA), S. Karthik Yadavalli (Harvard/CfA), V. Ashley Villar (Harvard/CfA),…
Source Group: VHU-TDA
Keywords: Spectroscopy, Transient, Supernova, Optical
Related Objects:
2025aarn
RA, DEC:04:37:19.577, -08:46:35.95
(69.331570, -8.776654)
Redshift:0.01685
Type:SN II
See object 2025aarn
,
2025aaxz
RA, DEC:09:44:34.866, +55:45:43.41
(146.145275, 55.762057)
Redshift:0.025
Type:SN II
See object 2025aaxz
,
2025abdd
RA, DEC:07:52:48.993, +69:00:14.76
(118.204136, 69.004099)
Redshift:0.01298
Type:SN Ic
See object 2025abdd
,
2025abmj
RA, DEC:11:32:32.000, +48:21:51.92
(173.133331, 48.364422)
Redshift:0.034
Type:SN II
See object 2025abmj
,
2025abob
RA, DEC:03:31:32.223, +04:55:37.36
(52.884264, 4.927043)
Redshift:0.037
Type:SN II
See object 2025abob
,
2025acnj
RA, DEC:04:33:31.391, +68:19:59.63
(68.380796, 68.333231)
Redshift:0.0116
Type:SN IIb
See object 2025acnj
,
2025acrr
RA, DEC:05:14:45.178, -14:26:58.73
(78.688240, -14.449647)
Redshift:0.036
Type:SN Ia
See object 2025acrr
,
2025acrz
RA, DEC:21:51:58.048, +17:52:48.51
(327.991866, 17.880142)
Redshift:0.098
Type:SN Ia
See object 2025acrz
,
2025acsj
RA, DEC:11:33:55.959, +49:23:02.21
(173.483163, 49.383947)
Redshift:0.05
Type:SN Ia
See object 2025acsj
,
2025aedq
RA, DEC:23:18:40.211, +27:38:48.53
(349.667547, 27.646814)
Redshift:0.0666
Type:SN Ia
See object 2025aedq
,
2025cku
RA, DEC:09:50:44.767, +27:18:08.75
(147.686530, 27.302432)
Redshift:0.075
Type:SN IIn
See object 2025cku
,
2025uam
RA, DEC:07:47:55.594, +34:02:06.94
(116.981640, 34.035262)
Redshift:0.0154
Type:SN II
See object 2025uam
,
2025ztn
RA, DEC:02:03:00.504, -09:39:50.05
(30.752099, -9.663902)
Redshift:0.0123
Type:SN IIb
See object 2025ztn
We report the classifications of 3 transients, including 1 Type II and 2 Type Ia. We also upload the followup spectra of 10 transients.

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