MASTER optical polarization variability detection in the Microquasar V404 Cyg/GS2023+33

Abstract

On 2015 June 15 the Swift space observatory discovered that the Galactic black hole candidate V404 Cyg was undergoing another active X-ray phase, after 25 years of inactivity (Barthelmy et al. 2015). Twelve telescopes of the MASTER Global Robotic Net located at six sites across four continents were the first ground based observatories to start optical monitoring of the microquasar after its gamma-ray wakeup at 18h 34m 09s U.T. on 2015 June 15 (Lipunov et al. 2015). In this paper we report, for the first time, the discovery of variable optical linear polarization, changing by 4-6% over a timescale of approximately 1 h, on two different epochs. We can conclude that the additional variable polarization arisies from the relativistic jet generated by the black hole in V404Cyg. The polarization variability correlates with optical brightness changes, increasing when the flux decreases.

arXiv comment10 pages, 1 figures, 4 tables, accepted for publication in the The Astrophysical Journal

References in corpus (14)

• The USNO-B Catalog
• Master Robotic Net
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• Correlated optical, X-ray, and gamma-ray flaring activity seen with INTEGRAL during the 2015 outburst of V404 Cygni
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• Robotic optical telescopes global network MASTER II. Equipment, structure, algorithms
• Prompt, early, and afterglow optical observations of five gamma-ray bursts (GRBs 100901A, 100902A, 100905A, 100906A, and 101020A)
• Characterizing X-ray and Radio emission in the Black Hole X-Ray Binary V404 Cygni during Quiescence
• The formation of the black hole in the X-ray binary system V404 Cyg
• Early polarization observations of the optical emission of gamma-ray bursts: GRB150301B and GRB150413A
• The optical identifcation of events with poorly defined locations: The case of the Fermi GBM GRB140801A
• Optical Observations of Gamma-Ray Bursts, the Discovery of Supernovae 2005bv, 2005ee, and 2006ak, and Searches for Transients Using the "MASTER" Robotic Telescope
• Optical polarization observations with the MASTER robotic net
• No Evidence of Intrinsic Optical/Near-Infrared Linear Polarization for V404 Cygni During its Bright Outburst in 2015: Broadband Modeling and Constraint on Jet Parameters

Cited by in corpus (13)

• High-precision optical polarimetry of the accreting black hole V404 Cyg during the June 2015 outburst
• Probing jet launching in neutron star X-ray binaries: the variable and polarized jet of SAX J1808.4-3658
• Optical and X-ray Correlations During the 2015 Outburst of the Black Hole V404 Cyg
• Simultaneous multiwavelength observations of V404 Cygni during its 2015 June outburst decay strengthen the case for an extremely energetic jet-base
• Rapid Optical Variations Correlated with X-rays in the 2015 Second Outburst of V404 Cygni (GS 2023$+$338)
• Measurement of Interstellar Polarization and Estimation of Galactic Extinction for the Direction of X-ray Black Hole Binary V404 Cygni
• MAGIC observations of the microquasar V404 Cygni during the 2015 outburst
• Short Timescale Evolution of the Polarized Radio Jet during V404 Cygni's 2015 Outburst
• Polarimetry of binary systems: polars, magnetic CVs, XRBs
• Three-stage Collapse of the Long Gamma-Ray Burst from GRB 160625B Prompt Multiwavelength Observations
• MITSuME observation of V404 Cygni in the 2015 outburst: Two optical variable components with different variability
• Optical/infrared polarised emission in X-ray binaries
• Science with a large field-of-view polarization survey: The Large Array Survey Telescope Polarization Node (LAST-P)