1E 1740.7-2942

Strong black-hole candidate

Also known as Great Annihilator · Swift J1743.9-2944 · 2CXO J174354.8-294443 · 3XMM J174354.7-294443 · SWIFT J174354.8-294441 · 1WGA J1743.9-2944 · 2SXPS J174354.8-294444 · 4XMM J174354.8-294443 · SRGA J174354.7-294444 · [KRL2007b] 265 · INTEGRAL1 64 · INTREF 816 · IRAS 17408-2942 · NAME Great Annihilator · [HPG94] 1 · [SKM2002] 23 · 1E 1740.7-2943 · 2E 1740.7-2943 · AX J1743.9-2945 · PBC J1744.0-2942 · SWIFT J1743.9-2944 · 2XMM J174354.8-294442 · SWIFT J1743.7-2946 · 2E 3938

MassNot reported by source catalogs

DistanceNot reported by source catalogs

HostNot reported by source catalogs

3D model “Blackhole” by rubykamen, licensed under CC BY 4.0.

Catalog record

Identity and classification

ID: vizier-blackcat:J/ApJS/222/15/table12:41
Canonical name: 1E 1740.7-2942
Alternate names: Great Annihilator · Swift J1743.9-2944 · 2CXO J174354.8-294443 · 3XMM J174354.7-294443 · SWIFT J174354.8-294441 · 1WGA J1743.9-2944 · 2SXPS J174354.8-294444 · 4XMM J174354.8-294443 · SRGA J174354.7-294444 · [KRL2007b] 265 · INTEGRAL1 64 · INTREF 816 · IRAS 17408-2942 · NAME Great Annihilator · [HPG94] 1 · [SKM2002] 23 · 1E 1740.7-2943 · 2E 1740.7-2943 · AX J1743.9-2945 · PBC J1744.0-2942 · SWIFT J1743.9-2944 · 2XMM J174354.8-294442 · SWIFT J1743.7-2946 · 2E 3938
Black-hole type: Stellar-Mass Binary
Status: Strong Candidate
Population: Catalog
Confidence: Strong black-hole candidate
Host galaxy: Not reported by source catalogs

Position

Coordinates and distance

Right ascension (RA): 265.97845833°
Declination (Dec): -29.74516667°
Galactic longitude (l): Not reported by source catalogs
Galactic latitude (b): Not reported by source catalogs
Distance: Not reported by source catalogs
Distance error: Not reported by source catalogs
Redshift: Not reported by source catalogs

Physical profile

Mass, spin, and system

Mass: Not reported by source catalogs
Mass error, lower: Not reported by source catalogs
Mass error, upper: Not reported by source catalogs
Spin: Not reported by source catalogs
Companion: Not reported by source catalogs
Companion type: Not reported by source catalogs
Orbital period: Not reported by source catalogs
Inclination: Not reported by source catalogs

Evidence

Detection and discovery

Detection method: X-ray binary classification
Discovery year: 1984
Discovery observatory: E
X-ray properties: WATCHDOG source type: BHC,P,R,J
Radio properties: Not reported by source catalogs
Gravitational-wave event: Not reported by source catalogs

Provenance

Sources and refresh state

Source catalog: VizieR J/ApJS/222/15 (WATCHDOG/BlackCAT)
Source reference: 2016ApJS..222...15T
Last updated: 2026-09-11T22:32:44.775Z
Source record: Open provider record ↗

Merged source records

VizieR J/ApJS/222/15 (WATCHDOG/BlackCAT)2016ApJS..222...15T
SIMBAD black-hole object typesSIMBAD object type BH/BH?