1998A&A...332..165D

Query : 1998A&A...332..165D

1998A&A...332..165D - Astronomy and Astrophysics, volume 332165-172 (1998/4-1)

The SIGMA pulse profiles of GX 1+4: four years of monitoring.

DAVID P., LAURENT P., DENIS M., PAUL L., BOUCHET J., ROQUES J.-P., JOURDAIN E., VEDRENNE G., GILFANOV M., CHURAZOV M., SUNYAEV R.A., KHAVENSON N., NOVIKOV B., CHULKOV I. and KUZNETZOV A.

Abstract (from CDS):

The soft γ-ray source GX 1+4 has been regularly monitored by the SIGMA telescope on board GRANAT since 1990. The accumulated data provides both period and spectral information on this source in the 35-150keV range. The SIGMA telescope also allows a determination of a pulsed fraction. We report here on the last six years of the SIGMA data on GX 1+4. The general spin down trend is confirmed and the derived periods are consistent with those obtained at other energies. The pulse profiles are shown to be roughly divided into two groups. One including those instances when GX 1+4 presents a relatively high pulsed fraction (>50%), the other containing those when the source exhibits a low pulsed fraction (<50%). In an effort to understand this result, we construct an emission model which is based nearly entirely on the geometry of the system to describe the pulse profiles. It is found that the pulsed fraction might possibly be linked to the height of the accretion column.

Abstract Copyright: ∼

Journal keyword(s): X-rays: stars - individual: GX 1+4 - gamma-rays: observations

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* V2116 Oph Sy* 17 32 02.1532435416 -24 44 44.129169096   20.78 18.4     M6IIIe 719 1

Query : 1998A&A...332..165D

Basic data :
V* V2116 Oph -- Symbiotic Star
Other object types: otypes_help 		X (2022MNRAS,3A,...), V* (2012A&A,V*), PN (PK,PN), * ([GF73],Gaia), gam (INTEGRAL1,INTREF), Sy* (1977ApJ), Psr (2007ApJS), HXB (2013ApJS), LXB (2006ApJ), LP* (2022yCat), C*? (2022yCat), SB* (SBC9), NIR (2MASS), Opt (ATO)
ICRS coord. (ep=J2000) : 		17 32 02.1532435416 -24 44 44.129169096 (Optical) [ 0.0624 0.0480 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		17 28 57.8665343296 -24 42 35.340110330 [ 0.0624 0.0480 90 ]
Gal coord. (ep=J2000) : 		001.9370431566606 +04.7949576680814 [ 0.0624 0.0480 90 ]
Proper motions mas/yr : 		-3.515 -1.992 [0.080 0.057 90] A 2020yCat.1350....0G
Spectral type: 		M6IIIe C 1977ApJ...211..866D
Fluxes (6) :
B 20.78 [~] D 2007A&A...469..807L
V 18.4 [~] D 2007A&A...469..807L
G 15.517966 [0.024463] C 2020yCat.1350....0G
J 10.095 [0.022] C 2003yCat.2246....0C
H 8.698 [0.051] C 2003yCat.2246....0C
K 7.979 [0.024] C 2003yCat.2246....0C
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Identifiers (30) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

2MASS J17320215-2444442 INTREF 788 SBC9 2611 V* V2116 Oph
3A 1728-247 1M 1728-247 SRGA J173202.0-244448 [BM83] X1728-247
ATO J263.0089-24.7456 NAME GF Star SWIFT J1731.9-2444 [GF73] B
GX 1+04 PBC J1732.0-2444 SWIFT J1732.0-2444 [KRL2007b] 245
GX 2+05 PK 001+04 1 TIC 193746936 Gaia DR2 4110236324513030656
1H 1728-247 PN MaC 1-5 2U 1728-24 Gaia DR3 4110236324513030656
H 1728-247 1RXS J173202.1-244500 3U 1728-24
INTEGRAL1 59 2S 1728-247 4U 1728-24

References (719 between 1850 and 2026) (Total 719)
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    Var : 6    PM : 2    SpT : 1   

   

Observing logs
ISO : 2   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : V* V2116 Oph

Link by name to the catalogue in VizieR :

2MASS J17320215-2444442 1RXS J173202.1-244500 V* V2116 Oph Gaia DR2 4110236324513030656 Gaia DR3 4110236324513030656

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