2022A&A...661A..42S


Query : 2022A&A...661A..42S

2022A&A...661A..42S - Astronomy and Astrophysics, volume 661A, 42-42 (2022/5-1)

Identification of SRGt 062340.2-265751 as a bright, strongly variable, novalike cataclysmic variable.

SCHWOPE A., BUCKLEY D.A.H., KAWKA A., KONIG O., LUTOVINOV A., MAITRA C., MEREMINSKIY I., MILLER-JONES J., PICHARDO MARCANO M., RAU A., SEMENA A., TOWNSEND L.J. and WILMS J.

Abstract (from CDS):

We report the identification and follow-up of the transient SRGt 062340.2-265751 detected with both instruments on board the Spektrum-Roentgen-Gamma mission. Optical spectroscopy of the G = 12.5 counterpart firmly classifies the object as a novalike cataclysmic variable (CV) at a distance of 495 pc. A highly significant TESS period of 3.941 h, tentatively identified with the orbital period of the binary, could not be found when the object was reobserved with TESS two years later. The newer high-cadence TESS data revealed quasi-periodic oscillations around 25 min, while ground-based photometry indicated periodic variability at 32 min. Located in very sparsely populated regions of color-magnitude diagrams involving X-ray and optical magnitudes and colors, the new object could be an X-ray underluminous magnetic CV, an intermediate polar, or an overluminous nonmagnetic CV. The lack of uniquely identified spin and orbital periods prevents a final classification. The site of X-ray production in the system, LX,bol = 4.8 x 1032 erg s–1, remains to be understood given its high variability on long and short timescales.

Abstract Copyright: © ESO 2022

Journal keyword(s): novae, cataclysmic variables - X-rays: stars - stars: individual: SRGt062340.2-265751

Status at CDS : Examining the need for a new acronym.

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* TV Col CV* 05 29 25.5292422792 -32 49 03.900212364   14.219 13.846 14.181   K2V 317 0
2 UCAC2 20781392 * 06 23 34.4441628696 -26 58 30.645864012   13.019 12.080 12.01 11.11 ~ 5 0
3 1RXS J062339.8-265744 X 06 23 39.8 -26 57 44           ~ 3 0
4 UCAC4 316-011308 * 06 23 40.0348994640 -26 57 50.783570064   12.719 12.724 12.783   ~ 3 0
5 NAME SRGt 062340.2-265751 CV* 06 23 40.21 -26 57 51.3           ~ 4 0
6 V* PQ Gem CV* 07 51 17.3280306912 +14 44 23.874868716           ~ 214 0

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2022.08.09-15:47:38

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