Optical photometry of the eclipsing Large Magellanic Cloud supersoft source CAL87

被引：13

作者：

Alcock, C

Allsman, RA

Alves, DR

Axelrod, TS

Bennett, DP

Charles, PA

Cook, KH

ODonoghue, D

Freeman, KC

Griest, K

Guern, J

Lehner, MJ

Livio, M

Marshall, SL

Minniti, D

Peterson, BA

Pratt, MR

Quinn, PJ

Rodgers, AW

Southwell, KA

Stubbs, CW

Sutherland, W

Welch, DL

机构：

[1] UNIV CALIF BERKELEY,CTR PARTICLE ASTROPHYS,BERKELEY,CA 94720

[2] AUSTRALIAN NATL UNIV,SUPERCOMP FACIL,CANBERRA,ACT 0200,AUSTRALIA

[3] UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616

[4] AUSTRALIAN NATL UNIV,MT STROMLO & SIDING SPRING OBSERV,WESTON,ACT 2611,AUSTRALIA

[5] UNIV OXFORD,DEPT ASTROPHYS,NUCL & ASTROPHYS LAB,OXFORD OX1 3RH,ENGLAND

[6] UNIV CAPE TOWN,DEPT ASTRON,ZA-7700 RONDEBOSCH,SOUTH AFRICA

[7] UNIV CALIF SAN DIEGO,DEPT PHYS,SAN DIEGO,CA 92093

[8] SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218

[9] UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106

[10] UNIV WASHINGTON,DEPT ASTRON,SEATTLE,WA 98195

[11] UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195

[12] MCMASTER UNIV,DEPT PHYS & ASTRON,HAMILTON,ON L8S 4M1,CANADA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1997年 / 287卷 / 03期

基金：

美国国家科学基金会;

关键词：

accretion; accretion discs; binaries; close; spectroscopic; stars; individual; CAL87; Magellanic Clouds; X-rays;

D O I：

10.1093/mnras/287.3.699

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present optical photometry of the eclipsing supersoft source CAL 87. These observations comprise long-term data accumulated as a by-product of the MACHO Project, and high-speed, white-light photometry of a single eclipse. We (i) derive an improved ephemeris of T-0 = HJD 245 0111.5144(3) + 0.442 677 14(6)E for the time of minimum light, (ii) find the eclipse structure to be stable over a period of similar to 4 yr, and (iii) investigate the colour variation as a function of orbital phase. The resolution afforded by the high-speed nature of the white-light observations enables us to see new structure in the light-curve morphology.

引用

页码：699 / 704

页数：6

共 31 条

[1]

Alcock C, 1996, MON NOT R ASTRON SOC, V280, pL49

[2] PROBABLE GRAVITATIONAL MICROLENSING TOWARD THE GALACTIC BULGE [J].