2024MNRAS.532L..21P

Query : 2024MNRAS.532L..21P

2024MNRAS.532L..21P - Mon. Not. R. Astron. Soc., 532, L21-L26 (2024/July-3)

Optical spectroscopic and photometric classification of the X-ray transient EP240309a (EP J115415.8-501810) as an intermediate polar.

POTTER S.B., BUCKLEY D.A.H., SCARINGI S., MONAGENG I.M., EGBO O.D., CHARLES P.A., ERASMUS N., VAN GEND C., LOUBSER E., TITUS K., ROSIE K., GAJJAR H., WORTERS H.L., CHANDRA S., JULIE R.P.M. and HLAKOLA M.

Abstract (from CDS):

We report on optical follow-up observations of an X-ray source initially detected by the Einstein Probe mission. Our investigations categorize the source as an intermediate polar, a class of magnetic cataclysmic variables, exhibiting an orbital period of 3.7614(4) h and a white dwarf spin period of 3.97 min. The orbital period was identified through TESS observations, while our high-speed photometric data, obtained using the 1.9m and Lesedi 1.0m telescopes at the South African Astronomical Observatory, revealed both the spin and beat periods. Additionally, we present orbitally phase-resolved spectroscopic observations using the 1.9m telescope, specifically centred on the H β emission line, which reveal two emission components that exhibit Doppler variations throughout the orbital cycle.

Abstract Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): accretion, accretion discs - stars: individual: EP J115415.8-501810 - novae, cataclysmic variables

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 CRTS J024048.5+195227 CV* 02 40 48.5356825200 +19 52 27.054272676     16.74     ~ 32 0
2 HD 289002 * 06 45 13.3725491952 +02 08 14.685250596 10.06 10.62 10.44     B1 277 0
3 ASASSN-V J115415.90-501802.1 CV* 11 54 15.9121110676 -50 18 02.043577656         16.313 ~ 6 0
4 LINEAR 18024182 CV* 16 21 17.3558840184 +44 12 54.125991504     15.03     ~ 45 0
5 V* AR Sco EB* 16 21 47.2831986456 -22 53 10.385689092   14.94 14.75     M5+D? 141 0
6 2MASS J19121372-4410450 Psr 19 12 13.7198308494 -44 10 45.084252619         16.055 ~ 34 0
7 V* AE Aqr CV* 20 40 09.1598959176 -00 52 15.055595220   12.46 10.40   10.191 K3-5IV/V 705 0
8 CTCV J2056-3014 CV* 20 56 52.1489639095 -30 14 39.112049459           ~ 30 0

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