The 2010 MAY FLARING EPISODE OF CYGNUS X-3 IN RADIO, X-Rays, AND Γ-Rays

Williams, Peter K. G.; Tomsick, John A.; Bodaghee, A.; Bower, Geoffrey C.; Pooley, G. G.; Pottschmidt, K.; Rodríguez, J.; Wilms, J.; Migliari, S.; Трушкин, С. А.

doi:10.1088/2041-8205/733/2/l20

Cited by 17 publications

(3 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tests of our transient detection process confirm, however, that it succeeds in this trivial case. Other work describes the ATA-42 observations of these events in more detail (Williams et al 2011). A somewhat larger portion of our observations has been processed and analyzed but without significant multi-epoch coverage of other pointings, and so is not presented in this work to maintain a clear focus on the better-covered Cyg X-3 and Kepler pointings.…”

Section: Subset Of Data Presented In This Workmentioning

confidence: 99%

“…We proceed by describing the ASGARD observations ( §2) and data processing ( §3) in detail. This work concerns itself with a subset of the whole dataset ( §3.1), representing ∼10% of the expected usable observations, while another portion of the dataset has already been described elsewhere (Williams et al 2011). We present first results ( §4) derived from analysis of this subset, including deep images, source catalogs, a transient search, and variability statistics.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Asgard: A Large Survey for Slow Galactic Radio Transients. I. Overview and First Results

Williams

Bower

Croft

et al. 2012

ApJ

Self Cite

View full text Add to dashboard Cite

Searches for slow radio transients and variables have generally focused on extragalactic populations, and the basic parameters of Galactic populations remain poorly characterized. We present a large 3 GHz survey performed with the Allen Telescope Array (ATA) that aims to improve this situation: ASGARD, the ATA Survey of Galactic Radio Dynamism. ASGARD observations spanned 2 years with weekly visits to 23 deg 2 in two fields in the Galactic Plane, totaling 900 hr of integration time on science fields and making it significantly larger than previous efforts. The typical blind unresolved source detection limit was 10 mJy. We describe the observations and data analysis techniques in detail, demonstrating our ability to create accurate wide-field images while effectively modeling and subtracting large-scale radio emission, allowing standard transient-and-variability analysis techniques to be used. We present early results from the analysis of two pointings: one centered on the microquasar Cygnus X-3 and one overlapping the Kepler field of view ( = 76 • , b = +13.5 • ). Our results include images, catalog statistics, completeness functions, variability measurements, and a transient search.Out of 134 sources detected in these pointings, the only compellingly variable one is Cygnus X-3, and no transients are detected. We estimate number counts for potential Galactic radio transients and compare our current limits to previous work and our projection for the fully-analyzed ASGARD dataset.

show abstract

Section: Subset Of Data Presented In This Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Asgard: A Large Survey for Slow Galactic Radio Transients. I. Overview and First Results

Williams

Bower

Croft

et al. 2012

ApJ

Self Cite

View full text Add to dashboard Cite

show abstract

“…During 2006-2009 Cyg X-3 showed similar dependencies between soft (RXTE ASM), hard (Swift/BAT) X-rays and radio emission ( [1,6,[8][9][10]). Gamma-ray emission was detected during the flaring states ( [11,12]).…”

Section: Monitoring Program Of Microquasars With the Ratan-600 Telescopementioning

confidence: 88%

The Giant Flares of the Microquasar Cygnus X-3: X-Rays States and Jets

et al. 2017

View full text Add to dashboard Cite

Abstract:We report on two giant radio flares of the X-ray binary microquasar Cyg X-3, consisting of a Wolf-Rayet star and probably a black hole. The first flare occurred on 13 September 2016, 2000 days after a previous giant flare in February 2011, as the RATAN-600 radio telescope daily monitoring showed. After 200 days on 1 April 2017, we detected a second giant flare. Both flares are characterized by the increase of the fluxes by almost 2000-times (from 5-10 to 17,000 mJy at 4-11 GHz) during 2-7 days, indicating relativistic bulk motions from the central region of the accretion disk around a black hole. The flaring light curves and spectral evolution of the synchrotron radiation indicate the formation of two relativistic collimated jets from the binaries. Both flares occurred when the source went from hypersoft X-ray states to soft ones, i.e. hard fluxes (Swift/BAT 15-50 keV data) dropped to zero, the soft X-ray fluxes (MAXI 2-10 keV data) staying high, and then later, the binary came back to a hard state. Both similar giant flares indicated the unchanged mechanism of the jets' formation in Cyg X-3, probably in conditions of strong stellar wind and powerful accretion onto a black hole.

show abstract

A search for time dependent neutrino emission from microquasars with the ANTARES telescope

Adrián-Martínez¹,

Albert²,

André³

et al. 2014

Journal of High Energy Astrophysics

View full text Add to dashboard Cite

Results are presented on a search for neutrino emission from a sample of six microquasars, based on the data collected by the ANTARES neutrino telescope between 2007 and 2010. By means of appropriate time cuts, the neutrino search has been restricted to the periods when the acceleration of relativistic jets was taking place at the microquasars under study. The time cuts have been chosen using the information from the X-ray telescopes RXTE/ASM and Swift/BAT, and, in one case, the gamma-ray telescope Fermi/LAT. No statistically significant excess has been observed, thus upper limits on the neutrino fluences have been derived and compared to the predictions by models. Constraints have been put on the ratio of proton to electron luminosity in the jets

show abstract

The 2010 MAY FLARING EPISODE OF CYGNUS X-3 IN RADIO, X-Rays, AND Γ-Rays

Cited by 17 publications

References 43 publications

Asgard: A Large Survey for Slow Galactic Radio Transients. I. Overview and First Results

Asgard: A Large Survey for Slow Galactic Radio Transients. I. Overview and First Results

The Giant Flares of the Microquasar Cygnus X-3: X-Rays States and Jets

A search for time dependent neutrino emission from microquasars with the ANTARES telescope

Contact Info

Product

Resources

About