AstroNotes

We observed the field of SN 2022xxf with the Jansky VLA. The flux density measured at 5.5 GHz is reported.

We report the detection of significant X-ray emission from the fast blue optical transient AT2022tsd at z=0.256.

We report the detection of X-ray emission at the position of the radio-loud fast optical transient AT2022tsd (z=0.256).

We report the detection of 15 GHz radio emission at the position of the fast optical transient AT2022tsd (z=0.256).

We report Keck/LRIS spectroscopy of a fast-rising optical transient coincident with a galaxy at z=0.256, implying a high peak luminosity (M_g < -20 mag).

The 4 images of gravitationally lensed SNIa 2022qmx (aka “SN Zwicky”; Goobar et al. AstroNote 2022-180) are resolved in HST observations from GO program 16264 (PI: Pierel). The data include F475W, ...

Keck II observations in J and Ks bands of the strongly lensed Type Ia SN 2020qmx ("SN Zwicky"; Goobar et al. AstroNote 2022-180) show that SN Zwicky is multiply lensed with 4 images of the supernov...

We report on the detection of SN 2021afdx, a type II SN discovered by the ATLAS survey on 2021-11-23, in James Webb Space Telescope NIRCam and MIRI images of ESO 350-40, the Cartwheel Galaxy.

We report on the detection of the Type IIP/L SN 2013ej from NIRCam F200W images taken by the James Webb Space Telescope on MJD 59777.583702 [Lee et. al, ERS 2107]. We perform preliminary aperture p...

We report the spectroscopic observation of Type IIn SN 2022myl. The spectrum shows a blue continuum and H and HeI emission lines. We find a good match with SN 2009ip 2 days after maximum.

MeerLICHT data on AT2022kms shows a first detection on 2021-11-24 at q=20.01+/-0.17 and a steady rise since.

We report the classification of AT2022hvp as a very luminous TDE at a redshift of z = 0.12, from SNID template matching which is consistent with the photoZ (0.124 +/- 0.0114) of host galaxy SDSS J0...

We report near-infrared (NIR) spectroscopy of AT 2022cmc obtained on 2022 Feb 16 15:22 UT, using the Near-Infrared Echellette Spectrometer (NIRES) on the Keck II telescope. The spectrum has low SNR...

Differential photometry has been obtained for nine current SN candidates with the 1.82-m Plaskett telescope at the Dominion Astrophysical Observatory (National Research Council of Canada)

We report the detection of evolving radio emission from the TDE AT2021sdu.

We report radio non-detections of three TDEs: AT2021ehb, AT2021mhg, and AT2021nwa.

Gaia detection of AT2021aeba on 2021-09-07

Forced photometry at the location of transient AT2021aeba (Fulton et al., AstroNote 2021-291; Chen et al., AstroNote 2021-292) revealed 48 detections in Zwicky Transient Facility data. The first ZT...

We report J-band imaging of the faint and fading transient AT2021aeba discovered by the Pan-STARRS Search for Kilonovae. The transient is detected at high significance but the proximity to the host...

We report BVRI photometry of SN 2021yja (ATLAS21bidw, TNS Report N° 122832), obtained by the SOS group (Supernova Observations and Simulations) with the 60 cm Helen Sawyer Hogg telescope at the Cas...

We report the detection of a counterpart to AT2021yja in Faulkes-North/MuSCAT imaging obtained before the ATLAS discovery.

Imaging observations of strong gravitationally-lensed supernova candidate AT 2021vkz (ZTF21abqoivk) with the Liverpool Telescope.

We report optical photometry of transients ATLAS21bgjq (AT2021weu; TNS Report No. 120736, filter R), ATLAS21bgtl (AT2021wvp; TNS Report No. 121436, filters BVRI) and ATLAS21bgni (AT2021wwl; TNS Rep...

We report VR photometry of transient ZTF21abuyqwf (AT2021wve; TNS Report No. 121347) obtained by the SOS (Supernova Observations and Simulations) with the 60 cm Helen Sawyer Hogg telescope in Casle...

We report the Pan-STARRS follow-up of the intrinsically faint transient AT2021qvw as an LBV-turning-supernova like event in the host galaxy CGCG 454-019, at a redshift of z = 0.025, or d = 111 Mpc ...

We report 100 SNe detected in the NEOWISE-R 2021 Data Release. We describe a few notable detections, including very bright mid-IR SNe, possible type Ia-CSM and 2010jl-like candidates.

We report VLA, SRG, and Swift observations of the fast-fading luminous transient AT2021tnj.

We report the rapid (0.5 mag/day) fading of AT2021qyd, a young blue extragalactic transient. The fast evolution, blue colors, and photometric redshift of the host galaxy is reminiscent of shock-coo...

Using VLT/X-shooter we confirm the redshift determination of z=1.5105 (Andreoni et al. 2021 ATel #14641) of the potential host galaxy of the fast X-ray transient XRT210423. The offset and peak lumi...

We report the detection of luminous X-ray emission from AT2021lfa, with a luminosity typical of long-duration GRB afterglows.

We report the first X-ray detection of SN2020tcw with the Chandra X-ray Observatory (CXO) at 60 days post-discovery.

We draw attention to the unusual lightcurve of AT2021esi from the combined ZTF and ATLAS survey data and Pan-STARRS1 observations. AT2021esi shows a rapidly rising and fast declining (1.5 mag in 10...

We report the UV and X-ray detection of optical tidal disruption event (TDE) ZTF20acyydkh/AT2021ack.

We report on optical observations of the fast blue transient ZTF21aakilyd/AT2021csp performed with Campo Imperatore Telescope.

We draw attention to the intrinsically faint and fast fading lightcurve of AT2021den from the combined Pan-STARRS and ATLAS survey data. It had a measured peak at M_w = -15.0 and a decline rate of ...

We have detected radio emission from the hydrogen-poor super-luminous supernova 2020tcw at 64 days post discovery.

We report the detection of 6 GHz radio emission from the hydrogen-poor super-luminous supernova 2017ens

We report UV/optical and X-ray observations of the fast, luminous blue transient ZTF21aakilyd/AT2021csp.

We draw attention to the rapidly fading lightcurve of AT2021buk from the combined ZTF and ATLAS survey data. The nature of AT2021buk is consistent with that of foreground CV, however, it is possibl...

Here we report our VLA observation of the Type Ib/c supernova SN2021bhd. We detect a single point source (consistent with the position of SN2021bhd) with a flux level of ~0.47 mJy at a central freq...

We carried out radio follow-up observations of SN 2020adow with the Jansky VLA. Measured fluxes at 5 GHz are reported.

We report the first radio observations taken as part of a new VLA Large Program dedicated to tidal disruption events (TDEs). We detect faint emission coincident with the TDEs AT2020ksf and AT2020zso.

We report the detection of significant X-ray emission from the fast blue optical transient AT2020xnd at z=0.2442.

We report the detection of luminous radio emission from the fast blue optical transient AT2020xnd at z=0.2442.

We report on the fast-fading, moderate-redshift AT2018cow-like transient AT2020xnd, discovered by ZTF on Oct 12. The magnitude of the transient is currently r~21.3 mag.

Follow-up observations of AT2020rml with the Liverpool Telescope do not detect the transient candidate, suggesting that it is not a real transient or that it has faded rapidly.

We report ultra-rapid ToO STIS and COS UV observations with the Hubble Space Telescope and Swift UV observations of the young and nearby SN 2020fqv. The first epoch of HST UV spectroscopy is schedu...