Optical identification of the LMC supersoft source RX J0527.8-6954 from MACHO project photometry

C. Alcock; R. A. Allsman; D. R. Alves; T. S. Axelrod; D. R. Bennett; P. A. Charles; K. H. Cook; K. C. Freeman; K. Griest; M. J. Lehner; M. Livio; S. L. Marshall; D. Minniti; B. A. Peterson; M. R. Pratt; P. J. Quinn; A. W. Rodgers; K. A. Southwell; C. W. Stubbs; W. Sutherland

doi:10.1093/mnras/291.1.L13

Optical identification of the LMC supersoft source RX J0527.8-6954 from MACHO project photometry

C. Alcock, R. A. Allsman, D. R. Alves, T. S. Axelrod, D. R. Bennett, P. A. Charles, K. H. Cook, K. C. Freeman, K. Griest, M. J. Lehner, M. Livio, S. L. Marshall, D. Minniti, B. A. Peterson, M. R. Pratt, P. J. Quinn, A. W. Rodgers, K. A. Southwell, C. W. Stubbs, W. Sutherland

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Abstract

We identify the likely optical counterpart to the Large Magellanic Cloud (LMC) supersoft X-ray source RX J0527.8-6954, and hence recover HV 2554. This identification is based on an analysis of ∼4 yr of optical photometry obtained serendipitously via the MACHO project. We see a steady fading of the star of ∼0.5 mag over the duration of the observations. Evidence is also presented for an orbital modulation of ∼0.05-mag semi-amplitude on a period of P = 0.39262 ± 0.00015 d. Our optical observations are consistent with the suggestion that the X-ray decline in this system is caused by cooling after a weak shell flash.

Original language	English
Pages (from-to)	L13-L16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	291
Issue number	1
DOIs	https://doi.org/10.1093/mnras/291.1.L13
Publication status	Published - 1997

Keywords

Accretion, accretion discs
Binaries: Close
Binaries: Spectroscopic
Stars: Individual: RX J0527.8-6954
X-rays: Stars

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/291.1.L13

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Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Bennett, D. R., Charles, P. A., Cook, K. H., Freeman, K. C., Griest, K., Lehner, M. J., Livio, M., Marshall, S. L., Minniti, D., Peterson, B. A., Pratt, M. R., Quinn, P. J., Rodgers, A. W., Southwell, K. A., Stubbs, C. W., & Sutherland, W. (1997). Optical identification of the LMC supersoft source RX J0527.8-6954 from MACHO project photometry. Monthly Notices of the Royal Astronomical Society, 291(1), L13-L16. https://doi.org/10.1093/mnras/291.1.L13

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title = "Optical identification of the LMC supersoft source RX J0527.8-6954 from MACHO project photometry",

abstract = "We identify the likely optical counterpart to the Large Magellanic Cloud (LMC) supersoft X-ray source RX J0527.8-6954, and hence recover HV 2554. This identification is based on an analysis of ∼4 yr of optical photometry obtained serendipitously via the MACHO project. We see a steady fading of the star of ∼0.5 mag over the duration of the observations. Evidence is also presented for an orbital modulation of ∼0.05-mag semi-amplitude on a period of P = 0.39262 ± 0.00015 d. Our optical observations are consistent with the suggestion that the X-ray decline in this system is caused by cooling after a weak shell flash.",

keywords = "Accretion, accretion discs, Binaries: Close, Binaries: Spectroscopic, Stars: Individual: RX J0527.8-6954, X-rays: Stars",

author = "C. Alcock and Allsman, {R. A.} and Alves, {D. R.} and Axelrod, {T. S.} and Bennett, {D. R.} and Charles, {P. A.} and Cook, {K. H.} and Freeman, {K. C.} and K. Griest and Lehner, {M. J.} and M. Livio and Marshall, {S. L.} and D. Minniti and Peterson, {B. A.} and Pratt, {M. R.} and Quinn, {P. J.} and Rodgers, {A. W.} and Southwell, {K. A.} and Stubbs, {C. W.} and W. Sutherland",

year = "1997",

doi = "10.1093/mnras/291.1.L13",

language = "English",

volume = "291",

pages = "L13--L16",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "1",

}

Alcock, C, Allsman, RA, Alves, DR, Axelrod, TS, Bennett, DR, Charles, PA, Cook, KH, Freeman, KC, Griest, K, Lehner, MJ, Livio, M, Marshall, SL, Minniti, D, Peterson, BA, Pratt, MR, Quinn, PJ, Rodgers, AW, Southwell, KA, Stubbs, CW & Sutherland, W 1997, 'Optical identification of the LMC supersoft source RX J0527.8-6954 from MACHO project photometry', Monthly Notices of the Royal Astronomical Society, vol. 291, no. 1, pp. L13-L16. https://doi.org/10.1093/mnras/291.1.L13

TY - JOUR

T1 - Optical identification of the LMC supersoft source RX J0527.8-6954 from MACHO project photometry

AU - Alcock, C.

AU - Allsman, R. A.

AU - Alves, D. R.

AU - Axelrod, T. S.

AU - Bennett, D. R.

AU - Charles, P. A.

AU - Cook, K. H.

AU - Freeman, K. C.

AU - Griest, K.

AU - Lehner, M. J.

AU - Livio, M.

AU - Marshall, S. L.

AU - Minniti, D.

AU - Peterson, B. A.

AU - Pratt, M. R.

AU - Quinn, P. J.

AU - Rodgers, A. W.

AU - Southwell, K. A.

AU - Stubbs, C. W.

AU - Sutherland, W.

PY - 1997

Y1 - 1997

N2 - We identify the likely optical counterpart to the Large Magellanic Cloud (LMC) supersoft X-ray source RX J0527.8-6954, and hence recover HV 2554. This identification is based on an analysis of ∼4 yr of optical photometry obtained serendipitously via the MACHO project. We see a steady fading of the star of ∼0.5 mag over the duration of the observations. Evidence is also presented for an orbital modulation of ∼0.05-mag semi-amplitude on a period of P = 0.39262 ± 0.00015 d. Our optical observations are consistent with the suggestion that the X-ray decline in this system is caused by cooling after a weak shell flash.

AB - We identify the likely optical counterpart to the Large Magellanic Cloud (LMC) supersoft X-ray source RX J0527.8-6954, and hence recover HV 2554. This identification is based on an analysis of ∼4 yr of optical photometry obtained serendipitously via the MACHO project. We see a steady fading of the star of ∼0.5 mag over the duration of the observations. Evidence is also presented for an orbital modulation of ∼0.05-mag semi-amplitude on a period of P = 0.39262 ± 0.00015 d. Our optical observations are consistent with the suggestion that the X-ray decline in this system is caused by cooling after a weak shell flash.

KW - Accretion, accretion discs

KW - Binaries: Close

KW - Binaries: Spectroscopic

KW - Stars: Individual: RX J0527.8-6954

KW - X-rays: Stars

UR - http://www.scopus.com/inward/record.url?scp=0040028920&partnerID=8YFLogxK

U2 - 10.1093/mnras/291.1.L13

DO - 10.1093/mnras/291.1.L13

M3 - Article

AN - SCOPUS:0040028920

SN - 0035-8711

VL - 291

SP - L13-L16

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

Optical identification of the LMC supersoft source RX J0527.8-6954 from MACHO project photometry

Abstract

Keywords

ASJC Scopus subject areas

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