The bright X ray transient GS2023+338 (=V404 Cyg) in optical outburst and decline

P. A. Charles; J. Casares; D. H. P. Jones; T. Broadhurst; P. J. Callanan; D. Carter; P. Hacking; B. J. M. Hassall; A. Lawrence; T. Naylor; R. G. M. Rutten; K. C. Sahu; A. Taylor

The bright X ray transient GS2023+338 (=V404 Cyg) in optical outburst and decline

P. A. Charles, J. Casares, D. H. P. Jones, T. Broadhurst, P. J. Callanan, D. Carter, P. Hacking, B. J. M. Hassall, A. Lawrence, T. Naylor, R. G. M. Rutten, K. C. Sahu, A. Taylor

School of Physics and Astronomy

Research output: Contribution to conference › Paper › peer-review

Abstract

The results of optical spectroscopy and photometry from La Palma (Canary Islands) of V404 Cyg are presented. They correspond to the optical counterpart of the new X-ray transient GS2023+338 discovered by Ginga. The overall light curve is similar to that of the previous optical outburst of this object, recorded as Nova Cyg 1938 and classified as a classical nova. It is not a classical or recurrent nova. The large range in optical brightness and intense X-ray emission at maximum indicate that the system must be a low-mass X-ray binary. The optical spectrum is unlike any known LMXB or X-ray transient in that it displays strong, broad, variable and complex emission lines of H, He I and He II. The reddened spectrum and interstellar absorption features indicate a problable distance in the range 1 to 3 kpc. Charged coupled device photometry reveals that the source is variable, but gives no indication of the orbital period, there being no eclipse or regular modulation.

Original language	English
Publication status	Published - 1 Nov 1989

Keywords / Materials (for Non-textual outputs)

Light Curve
Stellar Radiation
Stellar Spectra
Stellar Spectrophotometry
Transient Oscillations
X Ray Binaries
Bursts
Light (Visible Radiation)
Spectrum Analysis
Stellar Luminosity
X Ray Spectroscopy

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http://adsabs.harvard.edu/abs/1989ESASP.296..103C

Cite this

@conference{f248bb69c5b5456e8bd92144b92edc73,

title = "The bright X ray transient GS2023+338 (=V404 Cyg) in optical outburst and decline",

abstract = "The results of optical spectroscopy and photometry from La Palma (Canary Islands) of V404 Cyg are presented. They correspond to the optical counterpart of the new X-ray transient GS2023+338 discovered by Ginga. The overall light curve is similar to that of the previous optical outburst of this object, recorded as Nova Cyg 1938 and classified as a classical nova. It is not a classical or recurrent nova. The large range in optical brightness and intense X-ray emission at maximum indicate that the system must be a low-mass X-ray binary. The optical spectrum is unlike any known LMXB or X-ray transient in that it displays strong, broad, variable and complex emission lines of H, He I and He II. The reddened spectrum and interstellar absorption features indicate a problable distance in the range 1 to 3 kpc. Charged coupled device photometry reveals that the source is variable, but gives no indication of the orbital period, there being no eclipse or regular modulation.",

keywords = "Light Curve, Stellar Radiation, Stellar Spectra, Stellar Spectrophotometry, Transient Oscillations, X Ray Binaries, Bursts, Light (Visible Radiation), Spectrum Analysis, Stellar Luminosity, X Ray Spectroscopy",

author = "Charles, {P. A.} and J. Casares and Jones, {D. H. P.} and T. Broadhurst and Callanan, {P. J.} and D. Carter and P. Hacking and Hassall, {B. J. M.} and A. Lawrence and T. Naylor and Rutten, {R. G. M.} and Sahu, {K. C.} and A. Taylor",

note = "In ESA, The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy",

year = "1989",

month = nov,

day = "1",

language = "English",

}

TY - CONF

T1 - The bright X ray transient GS2023+338 (=V404 Cyg) in optical outburst and decline

AU - Charles, P. A.

AU - Casares, J.

AU - Jones, D. H. P.

AU - Broadhurst, T.

AU - Callanan, P. J.

AU - Carter, D.

AU - Hacking, P.

AU - Hassall, B. J. M.

AU - Lawrence, A.

AU - Naylor, T.

AU - Rutten, R. G. M.

AU - Sahu, K. C.

AU - Taylor, A.

N1 - In ESA, The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy

PY - 1989/11/1

Y1 - 1989/11/1

N2 - The results of optical spectroscopy and photometry from La Palma (Canary Islands) of V404 Cyg are presented. They correspond to the optical counterpart of the new X-ray transient GS2023+338 discovered by Ginga. The overall light curve is similar to that of the previous optical outburst of this object, recorded as Nova Cyg 1938 and classified as a classical nova. It is not a classical or recurrent nova. The large range in optical brightness and intense X-ray emission at maximum indicate that the system must be a low-mass X-ray binary. The optical spectrum is unlike any known LMXB or X-ray transient in that it displays strong, broad, variable and complex emission lines of H, He I and He II. The reddened spectrum and interstellar absorption features indicate a problable distance in the range 1 to 3 kpc. Charged coupled device photometry reveals that the source is variable, but gives no indication of the orbital period, there being no eclipse or regular modulation.

AB - The results of optical spectroscopy and photometry from La Palma (Canary Islands) of V404 Cyg are presented. They correspond to the optical counterpart of the new X-ray transient GS2023+338 discovered by Ginga. The overall light curve is similar to that of the previous optical outburst of this object, recorded as Nova Cyg 1938 and classified as a classical nova. It is not a classical or recurrent nova. The large range in optical brightness and intense X-ray emission at maximum indicate that the system must be a low-mass X-ray binary. The optical spectrum is unlike any known LMXB or X-ray transient in that it displays strong, broad, variable and complex emission lines of H, He I and He II. The reddened spectrum and interstellar absorption features indicate a problable distance in the range 1 to 3 kpc. Charged coupled device photometry reveals that the source is variable, but gives no indication of the orbital period, there being no eclipse or regular modulation.

KW - Light Curve

KW - Stellar Radiation

KW - Stellar Spectra

KW - Stellar Spectrophotometry

KW - Transient Oscillations

KW - X Ray Binaries

KW - Bursts

KW - Light (Visible Radiation)

KW - Spectrum Analysis

KW - Stellar Luminosity

KW - X Ray Spectroscopy

M3 - Paper

ER -

The bright X ray transient GS2023+338 (=V404 Cyg) in optical outburst and decline

Abstract

Keywords / Materials (for Non-textual outputs)

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