For reporting and commenting upon new observations of astronomical transients by the professional astrophysics community.
Overdue Last read · last published · next check
Last read 16 hours ago, longer than this feed's 2 hours schedule.
The NMW-TexasTech survey (Rokinon 135-mm f/2.2 telephoto lenses + QHY600PH-M CMOS camera) discovered an optical transient of 9.4 mag in Sagittarius on 2026 Aug 19.1063 UTC. ...
XRISM/Xtend Transient Search (XTS) detected an X-ray flare from an X-ray source XRISM J0433-6129 on 2026-08-18 TT. The source position is determined to be (R.A., Dec.) = (68.486, -61.493), with a systematic error of & sim;40 arcsec. ...
We report on SVOM Target-of-Opportunity (ToO) follow-up observations of MAXI J1750-327/EP260812c, a new black hole transient discovered by MAXI/GSC (ATel #17963) and Einstein Probe/WXT (ATel #17964) on August 12, 2026 (see also ATels #17969, #17971, #17974, #17977, #17978, #17979, #17983, #17988, and #17990). ...
We report multicolor photometric observations of the Type II supernova SN 2026fov (TNSTR-2026-1076, TNSCR-2026-1145), obtained using the OAUNI 51cm telescope (arXiv:1512.03104) at the Huancayo Observatory, Peru. ...
We report the classification of AT2026tiz and AT2026wza from spectroscopic observations with the Keck Cosmic Web Imager (KCWI) on the Keck II telescope obtained on 2026 August 14 UT. ...
We report on optical spectroscopy of the recently discovered X-ray transient MAXI J1750-327 / EP J175003.0-324244 (ATels #17963, #17964), whose multi-wavelength properties are consistent with a black hole X-ray binary in outburst (ATels #17969, #17971, #17974, #17977, #17978, #17979, #17983, #17988). ...
I report the spectroscopic classification of TCP J18251276-2225293 (ATel #17987) as a classical nova. I obtained its spectrum on 2026-08-19.482 UT with the fiber-fed integral field spectrograph (KOOLS-IFU; Matsubayashi et al. ...
We report the NIR detection of the counterpart to the recently discovered X-ray transient MAXI J1750-327 / EP J175003.0-324244 with the PRime-focus Infrared Microlensing Experiment (PRIME). ...
We report discovery of a galactic nova candidate TCP J18251276-2225293. The transient was discovered by the NMW-TexasTech survey on 2026-08-19.1063 UTC at an unfiltered magnitude of 9.4. ...
The accreting X-ray pulsar Her X-1 (HZ Her) is currently undergoing a rare anomalous low state (ALS), during which the normal 35-day X-ray cycle is strongly suppressed. ...