GRS 1915+105 “celebrates its majority” (1992–2010)

Castro‐Tirado, Alberto J.

doi:10.1017/s1743921310016145

Cited by 4 publications

(4 citation statements)

References 22 publications

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“…However, further investigations over radio, optical, and X-ray bands are needed to specifically address the reason of radio lead for this atypical outburst. -Tirado et al (1992) discovered GRS 1915+105 using WATCH on board GRANAT satellite. Apparent superluminal jets were detected (Mirabel & Rodríguez (1994)).…”

Section: H 1743-322mentioning

confidence: 99%

Evidence of Outflow-induced Soft Lags of Galactic Black Holes

Patra

Chatterjee

Dutta

et al. 2019

ApJ

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The nature of lag variation of Galactic black holes remains enigmatic mostly because of nonlinear and nonlocal physical mechanisms which contribute to the lag of the photons coming from the region close to the central black holes. One of the widely accepted major sources of the hard lag is the inverse Comptonization mechanism. However, exact reason or reasons for soft lags is yet to be identified. In this paper, we report a possible correlation between radio intensities of several outbursting Galactic black hole candidates and amounts of soft lag. The correlation suggests that the presence of major outflows or jets also change the disk morphology along the line of sight of the observer which produces soft lags.

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Section: H 1743-322mentioning

confidence: 99%

Evidence of Outflow-induced Soft Lags of Galactic Black Holes

Patra

Chatterjee

Dutta

et al. 2019

ApJ

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“…GRS 1915+105 was discovered in 1992 by the WATCH ASM aboard GRANAT (Castro-Tirado et al 1992) and has remained active ever since (Belloni & Altamirano 2013). The system exhibits very peculiar behavior, in the form of complex structured variability, such as QPOs ranging in frequency from 10 −3 Hz to 67 Hz and patterns of dips and rapid transitions between high and low intensity in the light curve (Greiner et al 1996;Morgan et al 1997;Belloni et al 2000;Klein-Wolt et al 2002;Fender & Belloni 2004;Hannikainen et al 2005).…”

Section: Grs 1915+105 (A)mentioning

confidence: 99%

WATCHDOG: A Comprehensive All-Sky Database of Galactic Black Hole X-ray Binaries

Tetarenko,

Sivakoff,

Heinke

et al. 2015

Preprint

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With the advent of more sensitive all-sky instruments, the transient Universe is being probed in greater depth than ever before. Taking advantage of available resources, we have established a comprehensive database of black hole (and black hole candidate) X-ray binary (BHXB) activity between 1996 and 2015 as revealed by all-sky instruments, scanning surveys, and select narrow-field X-ray instruments aboard the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL), Monitor of All-Sky X-ray Image (MAXI), Rossi X-ray Timing Explorer (RXTE), and Swift telescopes; the Whole-sky Alberta Time-resolved Comprehensive black-Hole Database Of the Galaxy or WATCHDOG. Over the past two decades, we have detected 132 transient outbursts, tracked and classified behavior occurring in 47 transient and 10 persistently accreting BHs, and performed a statistical study on a number of outburst properties across the Galactic population. We find that outbursts undergone by BHXBs that do not reach the thermally dominant accretion state make up a substantial fraction (∼ 40%) of the Galactic transient BHXB outburst sample over the past ∼ 20 years. Our findings suggest that this "hard-only" behavior, observed in transient and persistently accreting BHXBs, is neither a rare nor recent phenomenon and may be indicative of an underlying physical process, relatively common among binary BHs, involving the mass-transfer rate onto the BH remaining at a low level rather than increasing as the outburst evolves. We discuss how the larger number of these "hard-only" outbursts and detected outbursts in general have significant implications for both the luminosity function and mass-transfer history of the Galactic BHXB population.

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“…GRS 1915+105 is one of the well known LMXBs whose behavior at the high luminosity regime is fairly well characterized and extensively studied in outburst (Belloni et al 2000). Since the discovery outburst in 1992 (Castro-Tirado et al 1992), an exponential decay of its X-ray emission has been observed a few times (Negoro, et al 2018). The source also exhibited et al (2006); Miller-Jones et al (2008) has also become an interesting scheme to explain the spectral properties of Xray binaries in quiescence (Miller-Jones et al 2011;Plotkin et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Swift/XRT, Chandra, and XMM–Newton observations of IGR J17091–3624 as it returns into quiescence

Pereyra

Altamirano

Court

et al. 2020

Monthly Notices of the Royal Astronomical Society

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Abstract IGR J17091-3624 is a low mass X-ray binary (LMXB) which received wide attention from the community thanks to its similarities with the bright black hole system GRS 1915+105. Both systems exhibit a wide range of highly structured X-ray variability during outburst, with time scales from few seconds to tens of minutes, which make them unique in the study of mass accretion in LMXBs. In this work we present a general overview into the long-term evolution of IGR J17091-3624, using Swift/XRT observations from the onset of the 2011–2013 outburst in February 2011 to the end of the last bright outburst in November 2016. We found 4 re-flares during the decay of the 2011 outburst, but no similar re-flares appear to be present in the latter one. We studied in detail the period with the lowest flux observed in the last 10 years, just at the tail end of the 2011-2013 outburst, using Chandra and XMM-Newton observations. We observed changes in flux as high as a factor of 10 during this period of relative quiescence, without strong evidence of softening in the spectra. This result suggests that the source has not been observed at its true quiescence so far. By comparing the spectral properties at low luminosities of IGR J17091–3624 and those observed for a well studied population of LMXBs, we concluded that IGR J17091–3624 is most likely to host a black hole as a compact companion rather than a neutron star.

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GRS 1915+105 “celebrates its majority” (1992–2010)

Cited by 4 publications

References 22 publications

Evidence of Outflow-induced Soft Lags of Galactic Black Holes

Evidence of Outflow-induced Soft Lags of Galactic Black Holes

WATCHDOG: A Comprehensive All-Sky Database of Galactic Black Hole X-ray Binaries

Swift/XRT, Chandra, and XMM–Newton observations of IGR J17091–3624 as it returns into quiescence

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