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TCP J12321211-2407556: new transient (14.6 mag) in Corvus

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SPK's picture
TCP J12321211-2407556: new transient (14.6 mag) in Corvus

TCP J12321211-2407556 (UG:)

RA 12h32m12.11s, DE -24°07'55.6" (J2000.0)
2020 April 5.0749 UT, mag. 14.6 (CCD, unfiltered)
Discoverer: Brazilian Transient Search (BraTS)

2020 04 05.0749 UT
Discovered by C. Jacques, C. Colesanti, C.H. Barreto, E. Pimentel, I. Mussi, J. Ribeiro, M. Domingues, J. Amancio, L. Amaral, P. Holvorcem, T. Napoleao on behalf of the Brazilian Transient Search – BraTS – at SONEAR Observatory, Oliveira, Brazil in three frames with 10 seconds exposure using an astrograph 280mm f/2.2 + CCD unfiltered, with magnitude 14.6 under limiting mag = 17.2. Nothing is visible at this location on the previous frame (limiting mag = 17.2) taken on 2020 Mar 26.0611 UT.

2020 03 25.2488 UT
The likely progenitor is the blue star PSO J123212.132-240755.814 (gmag. 21.1, rmag. 21.3, imag. 21.3) with position end figures 12.134s in RA and 55.82 in DE (J2000.0). Other designations are GSC2.3 S6NB010820 (Bjmag. 21.7) and GALEX J123212.2-240758 (NUVmag. 21.3). No brightenings were recorded by the ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) between 2012 Feb. 27 / 2013 Dec. 11 and 2020 Mar. 25, the latest published observation (gmag. fainter than 17.3) was obtained on Mar. 25.249 UT; complete light curve at —— Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

WZ Sagittae-type dwarf nova outburst?
Time-resolved photometry, precise astrometry, spectroscopy, and multiband photometry are required.

Clear skies,

CrossoverManiac's picture
I tried taking measurements

I tried taking measurements of TCP J12321211-2407556, but it's below 16th magnitude which is well below what I'm capable of with my 6-inch telescope.  If anyone has the aperture for imaging stars at lower magnitudes, take a stab at it.

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