AstroNotes

We introduce BTSbot-nearby, a program for the autonomous follow-up of nearby transients, and report its rapid identification of SNe 2024iss and 2024jlf including photometry and spectroscopy of SN 202…

Here we report the ATLAS discovery of the transient ATLAS24hup (AT2024jrl) in galaxy 2MASX J10393454-0015117 at magnitude m_o = 19.10 +/- 0.19. At a distance of 82 Mpc, the transient was discovered …

Here we report the ATLAS discovery of the transient ATLAS24hqd (AT2024jgk) in galaxy WISEA J141759.57+164408.7 at magnitude m_o = 18.00 +/- 0.10. At a distance of 82 Mpc, the transient was discovere…

We report 5 hostless candidates selected by the ELEPHANT pipeline.

We report the discovery of an transient in NIRCam images of the SMACS-0723 field taken by the James Webb Space Telescope on MJD 60441.82 (GO-4043, PI Callum Witten). We detect a new source at RA=110…

We announce the next experimental survey with the Zwicky Transient Facility (ZTF), set to occur over three consecutive nights starting on 2024-06-04 at 04:00 UT (18 degree twilight). This experiment …

Here we report the ATLAS discovery of the transient ATLAS24hkn (AT2024jck) in galaxy ESO 352- G 030 at magnitude m_o = 16.97 +/- 0.06. At a distance of 81 Mpc, the transient was discovered on MJD = …

We reclassify SN 2024igg, initially classified as SN II, as a super-Chandrasekhar Ia (Ia-SC), or alternatively 03fg-like Ia. The spectrum displays prominent C II features, suggesting a dense carbon-r…

We report broad-band (BVRIL) polarimetric observations of SN 2024iss with the Liverpool Telescope on 2024 May 14.

We report the ZTF independent discovery and LCOGT follow-up photometry of AT 2024iss (GOTO24bmf, ZTF24aankvcy), a bright and fast transient located in a dwarf galaxy in the Coma cluster of galaxies

We detected a previously unknown variability (~0.3 magnitudes fading) of GSC2.3 N81Z000565 in the KATS database. More continuous data shows that the fading happened around HJD 2459658 and reached a m…

Here we report the GOTO discovery of a young transient at 18.7 Mpc.

We used the Low Resolution Imaging Spectrometer (LRIS) on the Keck Telescope to obtain a spectrum of AT2024hif/ZTF24aalbxfh. Narrow Hydrogen features at z = 0 confirm that the source is galactic.

We report photometric and spectroscopic observations of a rapidly evolving blue transient with a host-galaxy counterpart, AT2024hxb (ZTF24aalppmi). We obtained an LRIS spectrum, which yielded a reds…

This report includes the classification of 1 transient.

This report includes the classification of 5 transients.

We announce the next public experiment with the Zwicky Transient Facility (ZTF), set to happen over three consecutive nights starting on 2024-05-06 03:32 UT. With nightly-cadence, three-band (g, r, i…

Here we present multi-band photometric follow up observations of 9 optical transients using 1.82-m Plaskett Telescope + CCD at Dominion Astrophysical Observatory of the National Research Council of C…

We report ATLAS forced photometry, LCOGT imaging, and analysis of SN 2024gzk, the last reported supernova in the luminous infrared galaxy Arp 299, the most prolific supernova factory in the local uni…

Here we report the ATLAS discovery of the transient ATLAS24gji (AT2024hiy) in galaxy ESO 383- G 032 at magnitude m_o = 17.37 +/- 0.07. At a distance of 100 Mpc (redshift independent, from NED), the …

Here we report the ATLAS discovery of the transient ATLAS24gim (AT2024hhx) in galaxy 2MASX J08095527+4028039 at magnitude m_o = 18.70 +/- 0.14. At a distance of 89 Mpc, the transient was discovered …

We report ZTF photometry and Gemini spectroscopy of a fast-rising blue transient coincident with a high photo-z galaxy.

Here we report the ATLAS discovery of the transient ATLAS24ghc (AT2024hgi) in galaxy KK 2659 at magnitude m_o = 18.90 +/- 0.19. At a distance of 95 Mpc, the transient was discovered on MJD = 60417.8…

Here we report the ATLAS discovery of the transient ATLAS24ggr (AT2024hdf) in galaxy ESO361-G023 at magnitude m_o = 18.01 +/- 0.2. At a distance of 90 Mpc, the transient was discovered on MJD = 6042…

Here, we report the ATLAS discovery of the transient ATLAS24gbv (AT2024gwz) in galaxy NGC 1954 at magnitude m_o = 18.24 +/- 0.08. At a distance of 52.5 Mpc, the transient was discovered on MJD = 604…

Here we report the ATLAS discovery of the transient ATLAS24fxw (AT2024gty) in galaxy WISEA J200341.82-555455.4 at magnitude m_o = 16.87 +/- 0.05. At a distance of 66 Mpc, the transient was discovere…

This report includes classifications of five Type Ia's, one Type II, one SLSN-I and one AGN. We encourage followup observations.

We re-classify SN2024dde as a SLSN-I based on a combination of light curve information (current rise time 65 days, absolute magnitude -19.8 mag, still rising) and spectroscopic information.

We report 9 ZTF superluminous supernova candidates selected by our software filter and subsequent vetting. In this sample, a typical rise time is about 30 days and a typical peak r-band magnitude is …

This report includes classifications of two normal Type Ia's, one Type Ia-pec, and one Type II. SN 2024gei is an infant Type II, showing strong narrow Balmer emission lines, and SN 2024gep is a pecul…

We observed AT 2024ggi (ATLAS24fsk) with the Mephisto facilities (50 cm array and 1.6m) located at the Lijiang observatory. The preliminary analysis of 1.6m images indicates that the SN has brightene…

We report on the near-IR properties of the likely progenitor star of the recently discovered SN 2024ggi (ATLAS24fsk, GOTO24aig) in NGC 3621 using archival data from the VISTA Hemisphere Survey. VHS J…

We present follow-up photometry of AT2024fkm using AST3.

We measured the brightness at the location of SN 2024ggi (ATLAS24fsk) in the Legacy Survey images and found absolute magnitudes within the range typical for a red supergiant. We caution however that…

We report the LJT classification of the nearby transient AT 2024ggi in NGC 3621 as a young type II SN with flash features and a rapidly rising light curve.

We report that SN 2024ggi is a young Type II SN with flash ionization features.

We observed AT 2024ggi (ATLAS24fsk) with the 40cm-SLT at Lulin Observatory, Taiwan. We confirmed that the object has rapidly rising 2.3 mag in 8.1 hours in r-band since the discovery. The current mag…

We confirm the reported discovery of AT2024ggi in NGC 3621 (AstroNote 2024-100) with GOTO as part of our all-sky survey, detected at L = 16.83 +/- 0.02 (2024-04-11T10:51:22). Data taken 24h prior (20…

We report the ATLAS discovery of the nearby transient ATLAS24fsk (AT2024ggi) in galaxy NGC 3621 at 7 Mpc. The transient was discovered on MJD = 60411.14 (2024-04-11.14) at m_o = 18.92 +/- 0.08, corre…

We re-classify AT 2024eff at z = 0.059 as a Changing Look/State AGN based on archival optical spectroscopy and X-ray data.

This report includes classifications of 6 Type Ia SNe and one narrow lined transient (AT2023adr)

Here we report the ATLAS discovery of the transient ATLAS24foi (AT2024gep) in galaxy IC 4421 at magnitude m_o = 17.38 +/- 0.03. At a distance of 53 Mpc, the transient was discovered on MJD = 60410.1…

We announce the fourth experimental survey with the Zwicky Transient Facility (ZTF), set to occur over three consecutive nights starting on 2024-04-09 at 03:07 UT. This experiment aims to identify fa…

This report includes classifications of two Type Ia SNe, one Type Ic-BL SN and one probable SN 2024fpj. The latter appears to lie in a cluster of galaxies; the spectrum displays several unidentified …

We report the spectroscopic classification of the fast-fading transient AT2024fkm as a type IIb supernova.

ATLAS discovered and registered the transient AT2024fkm (ATLAS2024evb) in galaxy UGC08802 at magnitude o = 19.9+/- 0.1, which has been reported by Brennan et al. (AstroNote 2024-92) to be a faint and…

We report the spectroscopic observations of the rapidly fading AT2024fkm, with spectral and light curve appearances reminiscent of AT2017gfo.

We report observations of 7 transients using the Shane Kast spectrograph at the Lick observatory on the night of 2024-04-02. Classifications were found for 6 objects, which includes 1 SN Iax (02cx-li…