AstroNotes

V & B Measurements for T Corona Borealis (T CrB) previous to its predicted (expected) eruption

This report includes classifications of 12 Type Ia's (10 normal, 1 Ia-91T, and 1 Ia-CSM), 2 Type II's, 2 Type Ibn's, 1 SN and 1 Nova.

We report the classification of 2 superluminous supernovae using the Shane Kast spectrograph at the Lick observatory on the night of 2024-07-08. 2024jlc may also be the second closest Type-I superlum…

{{e.g. This report includes classifications of 9 Type Ia's, 3 Type II's and 1 SN.

We report 5 hostless candidates selected by the ELEPHANT pipeline.

This report includes classifications of 11 Type Ia's, 3 Type II's (one showing flash features), 1 core-collapse SN, and 2 galaxies.

Here we report the ATLAS discovery of the transient ATLAS24kyk (AT2024pfc) in galaxy IC 4367 at magnitude m_o = 18.12 +/- 0.12. At a distance of 60 Mpc, the transient was discovered on MJD = 60501.0…

We report observations of the FSRQ OQ 334 (a.k.a. B2 1420+32) with the Large Array Survey Telescope (LAST) during 2 nights, following up on recent reports of brightening in gamma-ray and optical obse…

Here we report the ATLAS discovery of the transient ATLAS24kve (AT2024pcw) in galaxy NGC 0662 at magnitude m_o = 17.75 +/- 0.09. At a distance of 76 Mpc, the transient was discovered on MJD = 60495…

Here we report the ATLAS discovery of the transient ATLAS24kuv (AT2024pbf) in galaxy UGC 02973 at magnitude m_o = 16.71 +/- 0.03. At a distance of 101 Mpc, the transient was discovered on MJD = 6049…

Here we report the ATLAS discovery of the transient ATLAS24kuu (AT2024pbe) in galaxy NGC 1132 at magnitude m_o = 18.01 +/- 0.12. At a distance of 84 Mpc, the transient was discovered on MJD = 60499…

Here we report the ATLAS discovery of the transient ATLAS24kut (AT2024pbd) in galaxy UGC 09761 at magnitude m_o = 18.97 +/- 0.17. At a distance of 78 Mpc, the transient was discovered on MJD = 60495…

We have obtained optical spectra of SN 2024lnq and SN 2024lpm, which show them to be a superluminous SN and an SN Ia, respectively.

This report includes classifications of 8 SNe Ia (including one 91T and one 91bg-like), 1 SN II and 1 CV.

This report includes classifications of 3 SNe Ia, 1 SN II, and 1 CV.

This report includes classifications of 4 SNe Ia, 1 SLSN-I, a blue-featureless transient, and a transient dominated by host galaxy light. We also refine our earlier classification of SN 2024ixo, iden…

Here we report the ATLAS discovery of the transient ATLAS24kpz (AT2024nwu) in galaxy 2MASX J01092413-6615363 at magnitude m_o = 17.54 +/- 0.06. At a distance of 100 Mpc, the transient was discovered…

We report a rebrightening of the TDE candidate AT 2023adr, one year after its first outburst. This supports its interpretation as a repeated partial TDE.

We report the classification of the optical transient ZTF24aaoxmyb/AT 2024lhc as a likely tidal disruption event.

We report a transient classification selected by the Tidal Disruption Event pipeline

This report includes classifications of 3 SNe Ia and 1 CV.

This report includes classifications of 4 Type Ia's, 1 Type II, 1 Type Ic, and one unclear red transient (SN 2024ixo). Follow-up observations, in particular of SN 2024ixo, are encouraged.

We report on the ZTF discovery of long-lasting transient emission towards the nucleus of 2MASX J21240027+3409114, a Seyfert 1 galaxy at z = 0.083. Preceded by at least 730 rest-frame days of no activ…

We announce the next experimental survey conducted using the Zwicky Transient Facility (ZTF), set to occur over three consecutive nights starting UT 2024-07-01 at 04:43:34 and ending UT 2024-07-03 at…

We report 7 hostless candidates selected by the ELEPHANT pipeline.

Here we report the ATLAS discovery of the transient ATLAS24jsp (AT2024mwc) in galaxy UGC 06106 at magnitude m_o = 18.58 +/- 0.12. At a distance of 88 Mpc, the transient was discovered on MJD = 60487…

We report on the ZTF discovery and LCOGT follow-up imaging of AT 2024muv (ZTF24aatbpbr), a bright SN candidate in NGC 4699, in the Virgo cluster of galaxies

We report the discovery of 78 transient sources likely at redshifts z = 0.21-4.82, each discovered in the JADES Deep field, which is located in GOODS-South (GOODS-S). We discovered these transients u…

Here we report the ATLAS discovery of the transient ATLAS24jjr (AT2024mpq) in galaxy MCG +06-49-027 at magnitude o = 17.08 +/- 0.05. At a distance of 73 Mpc, the transient was discovered on MJD = 604…

Here we report the ATLAS discovery of the transient ATLAS24jnd (AT2024mnp) in galaxy FGC 030A at magnitude m_o = 16.54 +/- 0.04. At a distance of 53 Mpc, the transient was discovered on MJD = 60484…

Here we report the ATLAS discovery of the transient ATLAS24jne (AT2024mnq) in galaxy UGC 00743 at magnitude m_o = 17.14 +/- 0.07. At a distance of 69 Mpc, the transient was discovered on MJD = 60484…

Here we report the ATLAS discovery of the transient ATLAS24jmx (AT2024mml) in galaxy ESO 324- G 035 at magnitude m_o = 17.41 +/- 0.13. At a distance of 53 Mpc, the transient was discovered on MJD = …

Here we present photometric follow up observations of selected optical transients using 0.76-m Baker-Nunn Schmidt Telescope + CCD at Rothney Astrophysical Observatory of the University of Calgary and…

We reclassified AT2024lby as an (extragalactic) SN II, rather than a galactic transient as reported in AstroNote 2024-157. The misclassification was caused by a reduction artifact, and reanalysis of …

We report 9 ZTF superluminous supernova candidates selected by our software filter and subsequent human vetting. In this sample, a typical rise time is longer than 20 days and a typical peak r-band m…

Here we report the ATLAS discovery of the transient ATLAS24jiz (AT2024luo) in galaxy NGC 0208 at magnitude m_o = 18.53 +/- 0.19. At a distance of 66 Mpc, the transient was discovered on MJD = 60479…

Using the MISTRAL spectro-imager at the OHP/T193 telescope, we classified the candidate supernovae AT2024kdh as normal type Ia SN.

We report ZTF observations of a blue rapidly evolving transient, AT2024lhs (ZTF24aascytf). The host galaxy has a Dark Energy Spectroscopic Instrument (DESI) redshift of z = 0.038, implying a peak abs…

We report spectroscopic follow-up observation of AT 2024lby (ZTF24aarvbxj). Our spectrum shows narrow absorption lines of Balmer, Na ID, and Ca II H & K at the Milky-Way Rest frame. AT 2024lby is lik…

Here we present photometric follow up observations of selected optical transients using 0.76-m Baker-Nunn Schmidt Telescope + CCD at Rothney Astrophysical Observatory of the University of Calgary and…

We report photometric and spectroscopic observations of a rapidly evolving transient, AT2024kmq (ZTF24aapvieu). A Gemini spectrum shows that the host-galaxy redshift is z = 0.192 and that the galaxy …

We report 7 ZTF superluminous supernova candidates selected by our software filter and subsequent human vetting. In this sample, a typical rise time is longer than 30 days and a typical peak r-band m…

We report 2 hostless candidates selected by the ELEPHANT pipeline.

Here we present photometric follow up observations of 3 optical transients using 0.76-m Baker-Nunn Schmidt Telescope + CCD at Rothney Astrophysical Observatory of the University of Calgary.

This report includes classification of one possible type Ib supernova with strong Ca features (similar to previous object SN 2010et), in the elliptical galaxy ESO 460- G 026.

We report the classifications of the optical transients ZTF24aakaiha/AT 2024gxr, ZTF24aahgxiz/AT 2024eqp, and ZTF24aajvvhj/AT 2024gre as tidal disruption events (TDEs).

This report includes classifications of three SNe Ia, and one SLSN-IIn, as well as two cataclysmic variables.

We report the classification of AT2024kce as a SN Ia-pec, likely in the Virgo Cluster. The spectrum shows a strong change in spectral slope at ~5500 A, strong Ti II absorption, and several narrow fea…

This report includes the classification of ten SNe Ia, and two SNe Ia-91T.

This report includes classifications of two SNe Ia, two SNe IIn, two SNe Ia 91T-like, one SN II, and one blue continuum source.