Absorption dips in the light curves of GRO J1655-40 and 4U 1630-47 during outburst

Abstract

Using the RXTE PCA we discovered deep dips in the X-ray light curves of the black-hole candidates GRO J1655-40 and 4U 1630-47 during outburst. Similar kind of dips for GRO J1655-40 were found in 90s measurements of the RXTE ASM during the same outburst. The duration of the dips in both sources is in the order of minutes. The occurrences of the dips observed with the RXTE PCA and ASM in GRO J1655-40 are consistent with the optically determined orbital period, and were found between photometric orbital phases 0.72 and 0.86. This constitutes the first evidence for orbital variations in X-rays for GRO J1655-40. The PCA data indicate that an absorbing medium is responsible for these dips. The X-ray spectra during the dips can be best described by a heavily absorbed component and an unabsorbed component. In the case of GRO J1655-40 we are able constrain the extent of the absorbing medium and the central X-ray source.

19 pages, including 3 figures. Accepted for publication in ApJ

References in corpus (2)

• An unstable central disk in the superluminal black-hole X-ray binary GRS 1915+105
• Complex outburst behaviour from the black-hole candidate 4U 1630-47

Cited by in corpus (78)

• Precise mass and spin measurements for a stellar-mass black hole through X-ray timing: the case of GRO J1655-40
• High-Mass X-ray Binaries in the Milky Way: A closer look with INTEGRAL
• Geometrical constraints on the origin of timing signals from black holes
• Simultaneous Chandra and RXTE Spectroscopy of the Microquasar H~1743-322: Clues to Disk Wind and Jet Formation from a Variable Ionized Outflow
• High- and low-frequency quasi-periodic oscillations in the X-ray light curves of the black hole transient H1743-322
• Spectral changes during dipping in low-mass X-ray binaries due to highly-ionized absorbers
• Observing the effects of the event horizon in black holes
• Discovery of two simultaneous non-harmonically related Quasi-Periodic Oscillations in the 2005 outburst of the black-hole binary GRO J1655-40
• Revealing a Cool Accretion Disk in the Ultraluminous X-ray Source M81 X-9 (Holmberg IX X-1): Evidence for an Intermediate Mass Black Hole
• Baryons in the relativistic jets of the stellar-mass black hole candidate 4U 1630-47
• Dynamical confirmation of a black hole in MAXI J1820+070
• The Disk Wind in the Rapidly Spinning Stellar-Mass Black Hole 4U 1630-472 Observed with NuSTAR
• MAXI J1659-152: The shortest orbital period black-hole transient in outburst
• Inclination and relativistic effects in the outburst evolution of black hole transients
• Suzaku discovery of iron absorption lines in outburst spectra of the X-ray transient 4U 1630-472
• Inclination-dependent spectral and timing properties in transient black hole X-ray binaries
• X-Ray Observations of the Black Hole Transient 4U 1630-47 During Two Years of X-Ray Activity
• Discovery of narrow X-ray absorption features from the dipping low-mass X-ray binary X 1624-490 with XMM-Newton
• Discovery of X-ray absorption features from the dipping low-mass X-ray binary XB 1916-053 with XMM-Newton
• An XMM-Newton study of the X-ray binary MXB1659-298 and the discovery of narrow X-ray absorption lines
• Black hole mass determination in the X-ray binary 4U 1630--47: Scaling of spectral and variability characteristics
• A dipping black-hole X-ray binary candidate in NGC 55
• The obscured X-ray binaries V404 Cyg, Cyg X-3, V4641 Sgr, and GRS 1915+105
• XMM-Newton observations reveal the disappearance of the wind in 4U 1630-47
• Discovery of narrow X-ray absorption features from the low-mass X-ray binary X 1254-690 with XMM-Newton
• Three Spectral States of the Disk X-Ray Emission of the Black-Hole Candidate 4U 1630-47
• XMM-Newton and INTEGRAL spectroscopy of the microquasar GRO J1655-40 during its 2005 outburst
• GRO J1655-40: Early Stages of the 2005 Outburst
• Reflection Modeling of the Black Hole Binary 4U~1630$-$47: the Disk Density and Returning Radiation
• Relativistic Iron Emission and Disk Reflection in Galactic Microquasar XTE J1748-288
• An optically-thick disk wind in GRO J1655-40?
• The Timing Evolution of 4U 1630-47 During its 1998 Outburst
• Discovery of complex narrow X-ray absorption features from the low-mass X-ray binary GX13+1 with XMM-Newton
• AstroSat and MAXI view of the Black Hole binary 4U 1630-472 during 2016 and 2018 Outbursts
• X-ray dips and a complex UV/X-ray cross-correlation function in the black hole candidate MAXI J1820+070
• A long-term X-ray monitoring of the ultraluminous X-ray source NGC 5408 X-1 with Swift reveals the presence of dips but no orbital period
• Chandra X-ray spectroscopy of a clear dip in GX 13+1
• Rapid State Transitions in the Galactic Black Hole Candidate Source GRS 1915+105
• Low Frequency (11 mHz) Oscillations in H1743-322: A New Class of Black Hole QPOs?
• SWIFT view of the 2015 outburst of GS 2023+338 (V404 Cyg): complex evolution of spectral and temporal characteristics
• X-ray Polarization of the Black Hole X-ray Binary 4U 1630-47 Challenges Standard Thin Accretion Disk Scenario
• The IR counterpart of the black-hole candidate 4U 1630-47
• The evolution of the broadband temporal features observed in the black-hole transient MAXI J1820+070 with Insight-HXMT
• The INTEGRAL view on Black Hole X-ray Binaries
• Magnetically driven superluminal motion from rotating black holes
• X-ray polarisation properties of thermal-radiative disc winds in binary systems
• X-ray behaviour of Circinus X-1 - I: X-ray Dips as a diagnostic of periodic behaviour
• IXPE and NICER view of Black hole X-ray binary 4U 1630-47: First significant detection of polarized emission in thermal state
• Chandra high-resolution spectra of 4U~1630-47: the disappearance of the wind
• Long Term Wind-Driven X-Ray Spectral Variability of NGC 1365 with Swift
• Missing hard states and regular outbursts: the puzzling case of the black hole candidate 4U 1630-472
• AstroSat and Chandra view of the high soft state of 4U 1630-47 (4U 1630-472): evidence of the disk wind and a rapidly spinning black hole
• The Hard State of the Highly Absorbed High Inclination Black Hole Binary Candidate Swift J1658.2-4242 Observed by NuSTAR and Swift
• High frequency features in the 1998 outburst of 4U 1630-47
• X-ray polarization from accretion disk winds
• The current state of disk wind observations in BHLMXBs through X-ray absorption lines in the iron band
• Evidence for Quasi-periodic X-Ray Dips from an Ultraluminous X-Ray Source: Implications for the Binary Motion
• The high energy emission of GRO J1655-40 as revealed with INTEGRAL spectroscopy of the 2005 outburst
• Suzaku Observation of the Black Hole Binary 4U 1630--47 in the Very High State
• The emission regions in X-ray binaries: dipping as a diagnostic
• Dips and eclipses in the X-ray binary Swift J1858.6-0814 observed with NICER
• Evidence for Doppler-Shifted Iron Emission Lines in Black Hole Candidate 4U 1630-47
• The spins of the Galactic black holes in MAXI J1535-571 and 4U 1630-472 from Insight-HXMT
• Scattering and Iron Fluorescence Revealed During Absorption Dips in Circinus X-1
• Detection of X-ray polarized emission and accretion-disk winds with IXPE and NICER in the black-hole X-ray binary 4U 1630-47
• Wideband Study of the Brightest Black Hole X-ray Binary 4U 1543-47 in the 2021 Outburst: Signature of Disk-Wind Regulated Accretion
• Fast Transition between High-soft and Low-soft States in GRS 1915+105: Evidence for a Critically Viscous Accretion Flow
• Spectropolarimetric study of 4U 1630$-$47 in Steep Power law state with IXPE and NICER
• A geometric origin for quasi-periodic oscillations in black hole X-ray binaries
• Disk emission and atmospheric absorption lines in black hole candidate 4U 1630-472
• Spectral Evolution of the Continuum and Disc Line in Dipping in GRO J1655-40
• XRISM insights for interstellar Sulfur
• The QPO states of 4U 1630-47
• Towards 4U 1630-47: a black-hole soft X-ray transient odyssey
• Discovery of X-ray absorption lines from the low-mass X-ray binaries 4U 1916-053 and X 1254-069 with XMM-Newton
• 20 years of disk winds in 4U 1630-47 -- I. Long-term behavior and influence of hard X-rays
• The peculiar disk evolution of 4U 1630--472 observed by Insight-HXMT during the 2022 and 2023 outbursts
• Galactic Electron-Positron Annihilation Emission from X-Ray Binaries with Transient and Persistent Jets