2021MNRAS.504.1331M

Query : 2021MNRAS.504.1331M

2021MNRAS.504.1331M - Mon. Not. R. Astron. Soc., 504, 1331-1339 (2021/June-2)

Evidence of disc reflection in the X-ray spectrum of the neutron star low-mass X-ray binary 4U 1636-536.

MONDAL A.S., RAYCHAUDHURI B. and DEWANGAN G.C.

Abstract (from CDS):

We present a broad-band spectral analysis of the atoll source 4U 1636-536 observed for ∼92 ks with NuSTAR. The source was found to be in a low-luminosity state during this observation with 3-79 keV X-ray luminosity of L_3-79 keV_ = (1.03 ± 0.01) x 1037 erg s–1, assuming a distance of 6 kpc. We have identified and removed 12 type-I X-ray bursts during this observation to study the persistent emission. The continuum is well described by a thermal Comptonization model nthcomp with Γ ∼ 1.9, kTe ∼ 28 keV, and kTs ∼ 0.9 keV. The NuSTAR data reveal a clear signature of disc reflection, a significantly broad Fe-K emission line (around 5-8 keV), and the corresponding reflection hump (around 15-30 keV). We have modelled the data with two relativistically blurred reflection models. Both families of reflection models prefer truncated inner disc radii prior to the ISCO. We find that the inner disc is truncated with an inner radius of Rin = 3.2-4.7 RISCO (≃16-24 Rg or 36-54 km). This inner disc radius suggests that the neutron star magnetic field strength is B <= 2.0 x 109 G.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): accretion, accretion discs - stars: individual: 4U 1636-536 - stars: neutron - X-rays: binaries

Simbad objects: 1

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Number of rows : 1
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 V* V801 Ara LXB 16 40 55.5976953528 -53 45 04.948107156 17.50 18.20 17.5   17.07 ~ 921 0

Query : 2021MNRAS.504.1331M

Basic data :
V* V801 Ara -- Low Mass X-ray Binary
Other object types: otypes_help 		X (2022MNRAS,4U,...), LXB (2013ApJS), gam (INTEGRAL1,INTREF), N* (2014MNRAS), N*? (2007ApJS), V* (V*), * (Gaia), NIR (DENIS)
ICRS coord. (ep=J2000) : 		16 40 55.5976953528 -53 45 04.948107156 (Optical) [ 0.1054 0.0783 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		16 36 56.5011603104 -53 39 17.218479762 [ 0.1054 0.0783 90 ]
Gal coord. (ep=J2000) : 		332.9150649169660 -04.8181482324033 [ 0.1054 0.0783 90 ]
Proper motions mas/yr : 		-5.903 -8.332 [0.155 0.117 90] A 2020yCat.1350....0G
Parallaxes (mas): 		0.2672 [0.1193] A 2020yCat.1350....0G
Fluxes (5) :
U 17.50 [~] D 2007A&A...469..807L
B 18.20 [~] D 2007A&A...469..807L
V 17.5 [~] D 2007A&A...469..807L
G 18.217991 [0.012823] C 2020yCat.1350....0G
I 17.07 [0.13] D 2005yCat.2263....0D
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Identifiers (29) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

4U 1636-536 1M 1636-536 SWIFT J1640.8-5343 XB 1636-536
3A 1636-536 MXB 1636-53 SWIFT J1640.9-5345 [BM83] X1636-536
DENIS J164055.5-534504 MXB 1637-53 TIC 1323558640 [KRL2007b] 196
1H 1636-536 MXB 1636-536 2U 1637-53 Gaia DR3 5930753870442684544
H 1641-53 PBC J1640.9-5344 3U 1636-53 Gaia DR2 5930753870442684544
H 1636-536 1RXS J164055.5-534505 4U 1636-53
INTEGRAL1 30 2S 1636-536 4U 1636-54
INTREF 714 SRGA J164055.5-534508 V* V801 Ara

References (921 between 1850 and 2026) (Total 921)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Distance : 1    Plx : 2    PM : 2   

   

Observing logs
XMM : 2   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : V* V801 Ara

Link by name to the catalogue in VizieR :

DENIS J164055.5-534504 1RXS J164055.5-534505 V* V801 Ara Gaia DR3 5930753870442684544 Gaia DR2 5930753870442684544

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