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The MAXI/GSC nova alert system triggered on an X-ray enhancement from the direction of the Perseus Cluster on August 11, 2026. Using GSC data obtained with the PSF-fitting method, we find ~2-sigma continuous count excesses in the 2-4 keV band on August 10 and 11, (1.48 (+0.72/-0.68))e-2 count/cm2/s (~ 13 mCrab) and (1.86 (+0.77/-0.72)) count/cm2/s, respectively, above the steady...

During the observations of the Galactic Center region on Aug. 13, 2026, the Mikhail Pavlinsky ART-XC telescope onboard the SRG observatory detected a new bright X-ray transient at the position of RA, Dec = 267.0020, -28.1407 (l,b = 0.9519, -0.0357), with estimated 90% containment radius of 10". ...

We report the discovery of a probable nova found during our survey of the central region of M31. The object was discovered on a co-added 600-s R-band CMOS frame taken on 2026 Aug. ...

We report the detection of a new X-ray transient by the Wide-field X-ray Telescope (WXT) onboard the Einstein Probe (EP), designated EP260812c. EP-WXT first detected the current outburst at 2026-08-12T20:10:43 (UTC), with a flux of about 7.43×10^-11 erg/cm^2/s, located at (R.A., DEC) = (267.4863 deg, -32.7155 deg) and (Galactic I, b) = (357.243 deg, -2.747 deg), with a 90% posi...

The MAXI/GSC nova alert system triggered on a bright X-ray transient source at 02:41 UT on August 13, 2026. Assuming that the source flux was constant over four transits from 01:09 to 05:48 on August 13, we obtain the source position at (R.A., Dec) = (267.736 deg, -32.734 deg) = (17 50 56.6, -32 44 02) (J2000) with a statistical 90% C.L. ...