AstroNotes

We have obtained SDSS g filter observations of specific optical transients discovered by ZTF (Fremling, C., et al.), Pan-STARRS (Chambers, K.C., et al.) and ATLAS (Tonry, J., et al),. The photome…

We have obtained SDSS u, g and r filter observations of SN 2023ixf in M101 discovered by K.Itagaki on 2023-05-19.728. The photometric observations and colour index were done using 1.8-m Plaskett Tele…

We report the radio detection of SN2023ixf in the nearby galaxy M101 at 10 GHz

We report that the fast declining transient reported in Astronote 2023-178 by Swain et al. was discovered and first reported to the Transient Name Server by ATLAS (Tonry et al. TNS Astronomical Trans…

We report the detection of luminous radio emission from the fast blue optical transient AT2023fhn at z=0.24.

We report the detection of luminous radio emission from the luminous fast blue optical transient AT2023hkw at z=0.339.

I report the continuation of the photometric follow-up of SN 2023ixf through images obtained remotely at the Burke-Gaffney Observatory - Halifax/Canada.

We report the results of Swift X-ray observations of AT2023jxk.

We report observations of a hostless, fast-evolving red transient. AT2023jxk is a candidate afterglow with no reported GRB counterpart.

Third set of multiple amateur calibrated measurements in V & B bands for supernova SN 2023ixf using the LCO Global Telescope Network 0m4 telescopes.

Using data taken with the Keck Planet Finder spectrograph we calculate a host E(B-V) extinction of 0.031±0.006.

We present a summary table of X-ray observations of the fast blue optical transient AT2022tsd for reference use in our submitted research note.

Second set of multiple amateur calibrated measurements in V & B bands for supernova SN 2023ixf using the LCO Global Telescope Network 0m4 telescopes.

I report the photometric follow-up of SN 2023ixf through an image obtained remotely at the Burke-Gaffney Observatory - Halifax/Canada.

Photometric follow-up observations of SN 2023ixf

Photometric multi-band follow up of SN 2023ixf in M101 from INAF - Brera Astronomical Observatory, Italy

The newly-reported pre-discovery images of M101 with small telescopes provide additional constraints on the SN 2023ixf eruption time. The first clear detection of the eruption is on 2023-05-18.82611 …

I here report a candidate for the progenitor of SN2023ixf. The archival HST and other multi-band images in the NASA Extragalactic Database (NED) were used to search for the progenitor at the reported…

We report the radio non-detection of SN2023ixf in the nearby galaxy M101 at 10 GHz.

23 serendipitous image frames of M101 were acquired showing SN 2023ixf during pre-discovery times 2023-05-19 05:11 UTC through 2023-05-19 10:48 UTC. Magnitude calculations were made for each frame u…

Multiple photometry measurements in the clear, V, B, R and I bands of supernova SN 20023ixf using MicroObservatory

Photometric follow up of SN 2023ixf in M101 from Observatoire du Mont St-Joseph, Québec, Canada.

Amateur Multiple measurements in V & B bands for supernova SN 2023ixf using the LCO Global Telescope Network 0m4 telescopes

We present the second spectrum of SN 2023ixf observed at 2023-05-24 03:36:42.676 UTC on May 24, 2023 (MJD = XYZ) using the Dark Energy Spectroscopic Instrument (DESI) at the 4m Mayall Telescope at Ki…

We report the preliminary results of the search for the progenitor of SN 2023ixf in archival HST data.

We present the spectrum of SN 2023ixf observed at 03:19:22.4 UTC on 23 May 2023 (MJD = 60087.138) using the Dark Energy Spectroscopic Instrument (DESI) at the 4m Mayall Telescope at Kitt Peak Nationa…

We report broad-band (BVRI) polarimetric observations of SN 2023ixf with the Liverpool Telescope on 2023 May 21

Following the discovery by Koichi Itagaki of SN 2023ixf in the nearby galaxy M101, images obtained by amateur astronomers from around the globe, as well as reports based on such data, have been strea…

We present a spectrum of SN 2023ixf observed on 21 May 2023 13:54:05 UTC

We report an SMA non-detection of SN 2023ixf at 230 GHz on 2023 May 21.17 UT, as part of the new large program POETS (Pursuit of Extragalactic Transients with the SMA).

We present the observations made by several China-based amateur astronomers that cover the onset of SN 2023ixf. A serendipitous time-lapse observation of M 101 captured the onset of the supernova exp…

Photometric follow-up observations of SN 2023ixf

I present several serendipitous images of SN 2023ixf taken by myself prior to the initial discovery report. I estimate a detection of clear = 15.5 +/- 0.5 mag at 03:54 UTC on 05/19/2023.

Pre-discovery images taken around 9, 18, 33 hours prior to discovery by Koichi Itagaki show brightness of ~15.3mag, ~17.3mag, and < 21-22 mag (3-sigma). The explosion therefore predates 2023-05-19 01…

We present a serendipitous image of SN 2023ixf taken by A V. Filippenko prior to the initial discovery report. We recovered a detection of clear = 16.0 +/- 0.3 mag at 06:08 UTC on 05/19/2023.

We present ZTF observations of SN 2023ixf in survey imaging taken prior to the initial discovery report. We recover a single detection (g=15.87) at MJD 60083.3229977, and a deep upper limit two days…

Photometric Follow up Observations of specific transients.

We report observations of the fast blue transient AT2023hkw (ZTF23aaimsja) ~3.3” from a cataloged galaxy in SDSS. In the g band, the transient brightened by 1.2 mag from the most recent upper limit i…

As part of the ongoing Spectroscopic Classification of Astronomical Transients (SCAT) Survey, we obtained a UH2.2m/SNIFS spectra of SN 2023aew 90 days after the initial discovery by ZTF. We find a go…

We report the Chandra X-ray detection of the luminous fast blue optical transient (LFBOT) AT2023fhn.

photometric follow-up is provided for SN candidate at2023hcp

We obtained ugRI imaging observations of AT2023fhn using FORS2 on the Very Large Telescope (VLT), measuring blue colours consistent with observations of past LFBOTs. Fits of the photometry to blackbo…

We report X-ray and millimeter-wave follow-up observations of the luminous fast blue optical transient (LFBOT) AT2023fhn.

We report on the significant rebrightening of ~1.8 magnitudes in ~5 days for the type IIb SN2023aew, more than 80 days after the initial classification. We obtained a spectrum of the target on 2023-0…

We report observations of the fast, blue transient AT2023fhn (ZTF23aaeozpp/ATLAS23hnk), 5” from a catalogued galaxy in SDSS. The transient brightened over two days and faded by 1.4 magnitudes over th…

We report a spectral transition of SN 2023emq from a Type Icn SN into a Type Ibn SN

We report the non-detection of 0.3-10 keV X-ray emission from the nearby (10 Mpc) stripped-envelope SN 2023dbc.

We report additional follow-up detections of X-ray emission from the fast blue optical transient AT2022tsd at z=0.256.

We report a Swift/XRT non-detection of the fast, blue, and luminous optical transient AT2023bbu.

We report a detection of an infrared transient in JWST NIRCam observations of Arp 220 (PID 2739). The source is detected in 6 filters and exhibits a red SED. These data were taken July 2022, so oppor…