First Results from the All-Sky Monitor on the Rossi X-ray Timing Explorer

Abstract

The All-Sky Monitor on the Rossi X-ray Timing Explorer has been monitoring the sky in the 1.5 - 12 keV band since late February. The instrument consists of three coded-aperture cameras which can be rotated to view different regions by a motorized drive assembly. Intensities of ~100 known sources are obtained via least-square fits of shadow patterns to the data and compiled to form x-ray light curves. Six orbital periodicities and four long-term periodicities, all previously known, have been detected in these light curves. Searches for additional sources have also been conducted. X-ray light curves for the Crab Nebula, Cyg X-1, 4U 1705-44, GRO J1655-40, and SMC X-1 are reported. They illustrate the quality of the results and the range of observed phenomena.

9 pages, LaTeX type (aas2pp4.sty), one bitmapped and two PostScript figures, to appear in ApJL, September 20, 1996

Cited by in corpus (458)

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• Optical Observations of the Black Hole Candidate XTE J1550-564 During Re-Flare and Quiescence
• On the enigmatic X-ray Source V1408 Aql (=4U 1957+11)
• The burst behavior of the eclipsing low-mass X-ray binary MXB 1659-298
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• Identification of a Likely Radio Counterpart of the Rapid Burster
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• Long Term X-ray Variability in GX13+1: Energy Dependent Periodic Modulation
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• Rxte Observations of a New X-Ray Transient: GRS 1737-31
• Two-phase X-ray burst from GX 3+1 observed by INTEGRAL
• IGR J00234+6141 : a new INTEGRAL source identified as an Intermediate polar
• The Transient Nature of GRO J1655-40 and its Evolutionary State
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• IGR J17254-3257, a new bursting neutron star
• A new bursting X-ray transient: SAX J1750.8-2900
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• RXTE Observations of the Be star X-ray Transient X0726-260 (4U0728-25) - Orbital and Pulse Periods
• Very long-term X-ray variations in LMXBs: solar cycle-like variations in the donor?
• A catalogue of unusually long thermonuclear bursts on neutron stars
• Reconsidering astrophysical constraints on macroscopic dark matter
• Discovery of millihertz quasi-periodic oscillations in the X-ray binary EXO 0748--676
• RXTE Studies of X-ray Spectral Variations with Accretion Rate in 4U 1915-05
• A decade of high-resolution radio observations of GRS 1915+105
• Search for Millisecond Periodicities in Type I X-ray Bursts of the Rapid Burster
• The Orbit and Position of the X-ray Pulsar XTE J1855-026 - an Eclipsing Supergiant System
• Simultaneous BeppoSAX and Rossi X-ray Timing Explorer observations of 4U1812-12
• The 2010 May Flaring Episode of Cygnus X-3 in Radio, X-Rays, and γ-Rays
• The aperiodic broad-band X-ray variability of Cygnus X-3
• A 2.4 - 12 microns spectrophotometric study with ISO of Cygnus X-3 in quiescence
• Anomalous Low States and Long Term Variability in the Black Hole Binary LMC X-3
• Discovery of the Optical Transient of the Gamma Ray Burst 990308
• Superorbital variability of X-ray and radio emission of Cyg X-1. I. Emission anisotropy of precessing sources
• Evidence for an anomalous state in the black-hole candidate 4U 1630-47
• Orbital evolution and search for eccentricity and apsidal motion in the eclipsing HMXB 4U 1700-37
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• A variable near-infrared counterpart to the neutron-star low-mass X-ray binary 4U 1705-440
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• Temporal properties of GX 301-2 over a year-long observation with SuperAGILE
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• Periodicities in the high-mass X-ray binary system RX J0146.9+6121/LS I+61 235
• Slow and Fast Transitions in the Rising Phase of Outbursts from NS-LMXB transients, AqlX-1 and 4U1608-52
• A return to strong radio flaring by Circinus X-1 observed with the Karoo Array Telescope test array KAT-7
• A transient I band excess in the optical spectrum of the accreting millisecond pulsar SAX J1808.4-3658
• The Chaotic Long-term X-ray Variability of 4U 1705--44
• Puzzling thermonuclear burst behaviour from the transient low-mass X-ray binary IGR J17473-2721
• Discovery of the near-infrared counterpart to the luminous neutron-star low-mass X-ray binary GX 3+1
• Astrophysical parameters and orbital solution of the peculiar X-ray transient IGR J00370+6122
• Observing Compact Stars with AstroSat
• A detailed study of the 5 Hz quasi-periodic oscillations in the bright X-ray transient and black-hole candidate GRS 1739-278
• Detection of a variable QPO at ~41 mHz in the Be/X-ray transient pulsar 4U 0115+634
• Double-peaked thermonuclear bursts at the soft-hard state transition in the Rapid Burster
• Near-infrared counterparts to the Galactic Bulge Survey X-ray source population
• Diverse Long-Term Variability of Five Candidate High-Mass X-ray Binaries from Swift Burst Alert Telescope Observations
• BEPPOSAX and RXTE spectral study of the low-mass X-ray binary 4u~1705-44. Spectral hardening during the banana branch
• TeV $\gamma$-ray fluxes from the long campaigns on Mrk421 as constraints on the emission of TeV-PeV Neutrinos and UHECRs
• Interpreting the X-ray state transitions of Cygnus X-1
• First e-VLBI observations of GRS 1915+105
• Discovery of SAX J1753.5-2349 and SAX J1806.5-2215: two X-ray bursters without detectable steady emission
• Probing the Transition Between the Synchrotron and Inverse-compton Spectral Components of 1ES 1959+650
• Possibility of a White Dwarf as the Accreting Compact Star in CI Cam (= XTE J0421+560)
• Hercules X-1: Empirical Models of UV Emission Lines
• The Swift Supergiant Fast X-ray Transients Project: a review, new results, and future perspectives
• The Orbital Period of the Be/Neutron Star Binary RX J0812.4-3114
• The Evolution of X-ray Bursts in the "Bursting Pulsar" GRO J1744-28
• Anticorrelated Hard/Soft X-Ray Emission from the X-Ray Burster 4U 0614+091
• Determination of parameters of long-term variability of the X-ray pulsar LMC X-4
• Constraining the Coronal Heights and Readjustment Velocities Based on the Detection of a Few Hundred Seconds Delays in the Z Source GX 17+2
• Simultaneous ASCA and HST/GHRS observations of Cygnus X-2/V1341 Cygni
• The relation between outburst rate and orbital period in low-mass X-ray binary transients
• Photoionized Lines in the X-ray Spectra of SMC X-1
• Swift/BAT and RXTE/ASM Observations of the 35-day X-ray Cycle of Hercules X-1
• Long-term optical variability of the blazars PKS 2005-489 and PKS 2155-304
• Detection of nearly periodic spin period reversals in Vela X-1 on long time-scales: inkling of solar-like cycle in the donor star?
• Variability of the Halpha emission of Cygnus X-1 and its connection with the soft X-ray radiation
• Searches for high-energy neutrino emission in the Galaxy with the combined IceCube-AMANDA detector
• On the geometric nature of low-frequency quasi-periodic oscillations in neutron-star low-mass X-ray binaries
• Recurrent ~24 h Periods in RXTE ASM Data
• An Empirical Method for Improving the Quality of RXTE HEXTE Spectra
• A Lack of Radio Emission from Neutron Star Low Mass X-ray Binaries
• Decade time-scale modulation of low mass X-ray binaries
• Anti-correlated Soft Lags in the Intermediate State of Black Hole Source GX 339-4
• Broadband Spectral Analysis of Aql X-1
• Circularly polarised radio emission from GRS 1915+105 and other X-ray binaries
• X-ray Variations at the Orbital Period from Cygnus X-1 in the High/Soft State
• Rossi X-ray Timing Explorer Observations of the X-ray Pulsar EXO 1722-363 - a Candidate Eclipsing Supergiant System
• First Results from Fermi GBM Earth Occultation Monitoring: Observations of Soft Gamma-Ray Sources Above 100 keV
• Spectral observations of X Persei: Connection between H-alpha and X-ray emission
• The persistent radio jet coupled to hard X-rays in the soft state of Cyg X-1
• X-Ray Light Curves of Gamma-ray Bursts Detected with the All-Sky Monitor on RXTE
• The Fermi-GBM X-ray burst monitor: thermonuclear bursts from 4U 0614+09
• RXTE monitoring of Centaurus A
• Recent Outbursts from the Transient X-Ray Pulsar Cep X-4 (GS 2138+56)
• Correlated Optical/X-ray Long-term Variability in LMXB 4U1636-536
• Optical and X-ray Outbursts of Be/X-ray binary system SAX J2103.5+4545
• Variable X-ray Absorption in the Seyfert 2 Galaxy Mrk 348
• Recent RXTE/ASM and ROTSEIIId Observations of EXO 2030+375
• Catalog of outbursts of neutron star LMXBs
• Serendipitous Detections of XTE J1906+09 with the Rossi X-ray Timing Explorer
• A Comparative Study of Machine Learning Methods for X-ray Binary Classification
• Vanishing hardness-flux correlation in Cygnus X-1: signs of the disc moving out
• Mirax: A Brazilian X-Ray Astronomy Satellite Mission
• Renewed activity from the X-ray transient SAXJ 1810.8-2609 with INTEGRAL
• X-ray outburst of 4U 0115+634 and ROTSE Observations of its Optical Counterpart V635 Cas
• The properties of cross-correlation and spectra of the low-mass X-ray binary 4U 1608-52
• X-ray properties of 4U 1543-624
• X-ray, optical and infrared investigation of the candidate Supergiant Fast X-ray Transient IGR J18462-0223
• Cross-correlations between soft and hard light curves depending on luminosity in the transient neutron star XTE J1701-462
• Multiplexing lobster-eye optics: a concept for wide-field X-ray monitoring
• RXTE All-Sky Monitor Detection of the Orbital Period of Scorpius X-1
• Exploring the Gamma Ray Horizon with the next generation of Gamma Ray Telescopes. Part 3: Optimizing the observation schedule of gamma-ray sources for the extraction of cosmological parameters
• Serpens X-1 observed by INTEGRAL
• GX 9+9: Variability of the X-Ray Orbital Modulation
• The protoMIRAX Hard X-ray Imaging Balloon Experiment
• New insights into the quasi-periodic X-ray burster GS 0836-429
• Possible 38 day X-ray period of KS1731-260
• Disappearance of the Fe K$\alpha$ emission line in Ultra Compact X-ray Binaries 4U 1543-624 and Swift J1756.9-2508
• Decades' long-term variations in NS-LMXBs observed with MAXI/GSC, RXTE/ASM and Ginga/ASM
• The 2019 outburst of AMXP SAX J1808.4-3658 and radio follow up of MAXI J0911-655 and XTE J1701-462
• Distinct accretion modes of Cygnus X-1 revealed from hard X-rays
• Sudden End of X-Ray Outbursts around Periastron of Circinus X-1 Observed with MAXI
• HST/NICMOS Observations of Fast Infrared Flickering in the Microquasar GRS 1915+105
• Long-term Optical Observations of the Be/X-ray Binary X Per
• Classifying X-ray Binaries: A Probabilistic Approach
• Quenched millimetre emission from Cygnus X-1 in a soft X-ray state
• A QPO in Mkn 421 from Archival RXTE Data
• RXTE and BeppoSAX Observations of the Transient X-ray Pulsar XTE J1859+083
• Multiresolution approach for period determination on unevenly sampled data
• An in-depth analysis of the variable cyclotron lines in GX 301$-$2
• Photometric Observations of Three High Mass X-Ray Binaries and a Search for Variations Induced by Orbital Motion
• X-ray spectral and flux variability of the microquasar GRS 1758-258 on timescales from weeks to years
• The Evolution of the Orbital Light-curve of Hercules X-1 with 35-day Phase
• Probing the Mysteries of the X-Ray Binary 4U 1210-64 with ASM, PCA, MAXI, BAT and Suzaku
• Monitoring observations of SMC X-1's excursions (MOOSE)-II: A new excursion accompanies spin-up acceleration
• Studies of Quasi Periodic Oscillations in the Black Hole Transient XTE J 1817-330
• The QPO states of 4U 1630-47
• Instability of the 13.8 day period in X-ray emission from 4U1700-377
• Outbursts, State Transitions, and Periodicities Observed with the RXTE All-Sky Monitor
• On the origin of the near-infrared emission from the neutron-star low-mass X-ray binary GX 9+1
• Observing Rayleigh-Taylor stable and unstable accretion through a Kalman filter analysis of X-ray pulsars in the Small Magellanic Cloud
• Measuring the magnetic dipole moment and magnetospheric fluctuations of accretion-powered pulsars in the Small Magellanic Cloud with an unscented Kalman filter
• AstroSat observation of rapid Type-I thermonuclear burst from the low mass X-ray binary GX 3+1
• Variations in the X-ray eclipse transitions of Cen X-3
• BeppoSAX and XMM-Newton spectral study of 4U 1735-44
• No apparent accretion mode changes detected in Cen X-3
• A Detection of an Anti-correlated Hard X-ray Lag in AM Herculis
• The failed state transition of the ATOLL source GRS 1724-308
• Comparing X-ray color selection in separating X-ray binary classes using Color-Color-Intensity diagrams
• Use of Gas Electron Multiplier (GEM) Detectors for an Advanced X-ray Monitor
• Effects of variability of X-ray binaries on the X-ray luminosity functions of Milky Way
• The LOFAR Transients Pipeline
• Multiwavelength Observations of Markarian 421 in 2005 - 2006
• Investigation of the Outburst Activity of the Black Hole Candidate GRS 1739-278
• An Optical Study of BG Geminorum: An Ellipsoidal Binary with an Unseen Primar Star
• Discovery of long-term superorbital periodicities in the pseudo-transient LMXBs: IGR J17098-3628 and EXO0748-676
• The INTEGRAL view of Gamma-Ray Bursts
• Phase-Resolved Spectroscopy of the Low-Mass X-ray Binary V801 Ara
• A Chronological History of X-Ray Astronomy Missions
• Results from Long-Term Optical Monitoring of the Soft X-Ray Transient SAX J1810.8-2609
• Long-term multi-frequency monitoring of microquasars
• Mass-Radius Constraints for 2S 0918-549 from an RXTE Superexpansion Burst: A Direct Cooling-Tail Analysis
• Detection of a cyclotron line in the Be X-ray pulsar IGR J06074$+$2205
• Simulations of a 2 x 1.5D coded aperture camera for X-ray astronomy
• Mass Transfer and Accretion in the Eccentric Neutron-Star Binary Circinus X-1
• Recurrent Instability in LMXB Accretion Disks: How Strange is GRS 1915+105?
• Prospects for detecting asteroid-mass primordial black holes in extreme mass-ratio inspirals with continuous gravitational waves