Optical and X-ray observations of the microquasar V404 Cyg during its June 2015 outburst

J. Alfonso-Garzon; C. Sanchez-Fernandez; P. A. Charles; J. M. Mas-Hesse; P. Gandhi; M. Kimura; A. Domingo; J. Rodriguez; J. Chenevez

Optical and X-ray observations of the microquasar V404 Cyg during its June 2015 outburst

J. Alfonso-Garzon^*, C. Sanchez-Fernandez, P. A. Charles, J. M. Mas-Hesse, P. Gandhi, M. Kimura, A. Domingo, J. Rodriguez, J. Chenevez

^*Corresponding author for this work

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Abstract

We present a multiwavelength analysis of the simultaneous optical and X-ray light curves of the microquasar V404 Cyg during the June 2015 outburst. We have performed a comprehensive analysis of all the INTEGRAL/IBIS, JEM-X, and OMC observations during the brightest epoch of the outburst, along with complementary NuSTAR, AAVSO, and VSNET data, to examine the timing relationship between the simultaneous optical and X-ray light curves, in order to understand the emission mechanisms and physical locations. We identified all optical ares with simultaneous X-ray observations, and performed cross-correlation analysis to estimate the time delays between the optical and soft and hard X-ray emission.
We have also compared the evolution of the optical and X-ray emission with the hardness-ratios. From this analysis, we identified several types of behaviour during the outburst, including simultaneous optical/X-ray ares, optical ares lagging the X-ray ares, and optical emission preceding the X-ray emission.

Original language	English
Title of host publication	Highlights on Spanish Astrophysics X, Proceedings of the XIII Scientific Meeting of the Spanish Astronomical Society
Editors	B. Montesinos, A. Asensio Ramos, F. Buitrago , R. Schödel , E. Villaver, S. Pérez-Hoyos, I. Ordóñez-Etxeberria
Publisher	La Sociedad Española de Astronomía
Publication date	2019
Pages	255-260
Publication status	Published - 2019
Event	XIII Scientific Meeting of the Spanish Astronomical Society - Salamanca, Spain Duration: 16 Jul 2018 → 20 Jul 2018

Conference

Conference	XIII Scientific Meeting of the Spanish Astronomical Society
Country/Territory	Spain
City	Salamanca
Period	16/07/2018 → 20/07/2018

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Alfonso-Garzon, J., Sanchez-Fernandez, C., Charles, P. A., Mas-Hesse, J. M., Gandhi, P., Kimura, M., Domingo, A., Rodriguez, J., & Chenevez, J. (2019). Optical and X-ray observations of the microquasar V404 Cyg during its June 2015 outburst. In B. Montesinos, A. Asensio Ramos, F. Buitrago , R. Schödel , E. Villaver, S. Pérez-Hoyos, & I. Ordóñez-Etxeberria (Eds.), Highlights on Spanish Astrophysics X, Proceedings of the XIII Scientific Meeting of the Spanish Astronomical Society (pp. 255-260). La Sociedad Española de Astronomía .

Alfonso-Garzon, J. ; Sanchez-Fernandez, C. ; Charles, P. A. et al. / Optical and X-ray observations of the microquasar V404 Cyg during its June 2015 outburst. Highlights on Spanish Astrophysics X, Proceedings of the XIII Scientific Meeting of the Spanish Astronomical Society. editor / B. Montesinos ; A. Asensio Ramos ; F. Buitrago ; R. Schödel ; E. Villaver ; S. Pérez-Hoyos ; I. Ordóñez-Etxeberria. La Sociedad Española de Astronomía , 2019. pp. 255-260

@inproceedings{4401d06dc4f04b619eac71f23d9259d8,

title = "Optical and X-ray observations of the microquasar V404 Cyg during its June 2015 outburst",

abstract = "We present a multiwavelength analysis of the simultaneous optical and X-ray light curves of the microquasar V404 Cyg during the June 2015 outburst. We have performed a comprehensive analysis of all the INTEGRAL/IBIS, JEM-X, and OMC observations during the brightest epoch of the outburst, along with complementary NuSTAR, AAVSO, and VSNET data, to examine the timing relationship between the simultaneous optical and X-ray light curves, in order to understand the emission mechanisms and physical locations. We identified all optical ares with simultaneous X-ray observations, and performed cross-correlation analysis to estimate the time delays between the optical and soft and hard X-ray emission.We have also compared the evolution of the optical and X-ray emission with the hardness-ratios. From this analysis, we identified several types of behaviour during the outburst, including simultaneous optical/X-ray ares, optical ares lagging the X-ray ares, and optical emission preceding the X-ray emission. ",

author = "J. Alfonso-Garzon and C. Sanchez-Fernandez and Charles, {P. A.} and Mas-Hesse, {J. M.} and P. Gandhi and M. Kimura and A. Domingo and J. Rodriguez and J. Chenevez",

year = "2019",

language = "English",

pages = "255--260",

editor = "B. Montesinos and {Asensio Ramos}, { A. } and {Buitrago }, F. and {Sch{\"o}del }, {R. } and Villaver, {E. } and P{\'e}rez-Hoyos, {S. } and Ord{\'o}{\~n}ez-Etxeberria, {I. }",

booktitle = "Highlights on Spanish Astrophysics X, Proceedings of the XIII Scientific Meeting of the Spanish Astronomical Society",

publisher = "La Sociedad Espa{\~n}ola de Astronom{\'i}a ",

note = "XIII Scientific Meeting of the Spanish Astronomical Society ; Conference date: 16-07-2018 Through 20-07-2018",

}

Alfonso-Garzon, J, Sanchez-Fernandez, C, Charles, PA, Mas-Hesse, JM, Gandhi, P, Kimura, M, Domingo, A, Rodriguez, J & Chenevez, J 2019, Optical and X-ray observations of the microquasar V404 Cyg during its June 2015 outburst. in B Montesinos, A Asensio Ramos, F Buitrago , R Schödel , E Villaver, S Pérez-Hoyos & I Ordóñez-Etxeberria (eds), Highlights on Spanish Astrophysics X, Proceedings of the XIII Scientific Meeting of the Spanish Astronomical Society. La Sociedad Española de Astronomía , pp. 255-260, XIII Scientific Meeting of the Spanish Astronomical Society, Salamanca, Spain, 16/07/2018.

Optical and X-ray observations of the microquasar V404 Cyg during its June 2015 outburst. / Alfonso-Garzon, J.; Sanchez-Fernandez, C.; Charles, P. A. et al.
Highlights on Spanish Astrophysics X, Proceedings of the XIII Scientific Meeting of the Spanish Astronomical Society. ed. / B. Montesinos; A. Asensio Ramos; F. Buitrago ; R. Schödel ; E. Villaver; S. Pérez-Hoyos; I. Ordóñez-Etxeberria. La Sociedad Española de Astronomía , 2019. p. 255-260.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

TY - GEN

T1 - Optical and X-ray observations of the microquasar V404 Cyg during its June 2015 outburst

AU - Alfonso-Garzon, J.

AU - Sanchez-Fernandez, C.

AU - Charles, P. A.

AU - Mas-Hesse, J. M.

AU - Gandhi, P.

AU - Kimura, M.

AU - Domingo, A.

AU - Rodriguez, J.

AU - Chenevez, J.

PY - 2019

Y1 - 2019

N2 - We present a multiwavelength analysis of the simultaneous optical and X-ray light curves of the microquasar V404 Cyg during the June 2015 outburst. We have performed a comprehensive analysis of all the INTEGRAL/IBIS, JEM-X, and OMC observations during the brightest epoch of the outburst, along with complementary NuSTAR, AAVSO, and VSNET data, to examine the timing relationship between the simultaneous optical and X-ray light curves, in order to understand the emission mechanisms and physical locations. We identified all optical ares with simultaneous X-ray observations, and performed cross-correlation analysis to estimate the time delays between the optical and soft and hard X-ray emission.We have also compared the evolution of the optical and X-ray emission with the hardness-ratios. From this analysis, we identified several types of behaviour during the outburst, including simultaneous optical/X-ray ares, optical ares lagging the X-ray ares, and optical emission preceding the X-ray emission.

AB - We present a multiwavelength analysis of the simultaneous optical and X-ray light curves of the microquasar V404 Cyg during the June 2015 outburst. We have performed a comprehensive analysis of all the INTEGRAL/IBIS, JEM-X, and OMC observations during the brightest epoch of the outburst, along with complementary NuSTAR, AAVSO, and VSNET data, to examine the timing relationship between the simultaneous optical and X-ray light curves, in order to understand the emission mechanisms and physical locations. We identified all optical ares with simultaneous X-ray observations, and performed cross-correlation analysis to estimate the time delays between the optical and soft and hard X-ray emission.We have also compared the evolution of the optical and X-ray emission with the hardness-ratios. From this analysis, we identified several types of behaviour during the outburst, including simultaneous optical/X-ray ares, optical ares lagging the X-ray ares, and optical emission preceding the X-ray emission.

M3 - Article in proceedings

SP - 255

EP - 260

BT - Highlights on Spanish Astrophysics X, Proceedings of the XIII Scientific Meeting of the Spanish Astronomical Society

A2 - Montesinos, B.

A2 - Asensio Ramos, A.

A2 - Buitrago , F.

A2 - Schödel , R.

A2 - Villaver, E.

A2 - Pérez-Hoyos, S.

A2 - Ordóñez-Etxeberria, I.

PB - La Sociedad Española de Astronomía

T2 - XIII Scientific Meeting of the Spanish Astronomical Society

Y2 - 16 July 2018 through 20 July 2018

ER -

Alfonso-Garzon J, Sanchez-Fernandez C, Charles PA, Mas-Hesse JM, Gandhi P, Kimura M et al. Optical and X-ray observations of the microquasar V404 Cyg during its June 2015 outburst. In Montesinos B, Asensio Ramos A, Buitrago F, Schödel R, Villaver E, Pérez-Hoyos S, Ordóñez-Etxeberria I, editors, Highlights on Spanish Astrophysics X, Proceedings of the XIII Scientific Meeting of the Spanish Astronomical Society. La Sociedad Española de Astronomía . 2019. p. 255-260

Optical and X-ray observations of the microquasar V404 Cyg during its June 2015 outburst

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