Discovery of pulsed X-ray emission from the small magellanic cloud transient RX J0117.6-7330

D. J. Macomb; M. H. Finger; B. A. Harmon; R. C. Lamb; T. A. Prince

doi:10.1086/312074

Discovery of pulsed X-ray emission from the small magellanic cloud transient RX J0117.6-7330

D. J. Macomb, M. H. Finger, B. A. Harmon, R. C. Lamb, T. A. Prince

Physics Department

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

We report on the detection of pulsed, broadband, X-ray emission from the transient source RX J0117.6-7330. The pulse period of 22 s is detected by the ROSAT/PSPC instrument in a 1992 September 30-October 2 observation and by the Compton Gamma-Ray Observatory/BATSE instrument during the same epoch. Hard X-ray pulsations are detectable by BATSE for approximately 100 days surrounding the ROSAT observation (1992 August 28-December 8). The total directly measured X-ray luminosity during the ROSAT observation is 1.0 × 10³⁸ (d/60 kpc)² ergs s^-1. The pulse frequency increases rapidly during the outburst, with a peak spin-up rate of 1.2 × 10^-10 Hz s^-1 and a total frequency change of 1.8%. The pulsed percentage is 11.3% from 0.1-2.5 keV, increasing to at least 78% in the 20-70 keV band. These results establish RX J0117.6-7330 as a transient Be binary system.

Original language	English
Pages (from-to)	L99-L102
Journal	Astrophysical Journal
Volume	518
Issue number	2 PART 2
DOIs	https://doi.org/10.1086/312074
State	Published - 20 Jun 1999

Keywords

Accretion, accretion disks
Stars: individual (RX J0117.6-7330)
X-rays: general

Access to Document

10.1086/312074

Cite this

@article{b843d27c3e294e2690e5074570eac811,

title = "Discovery of pulsed X-ray emission from the small magellanic cloud transient RX J0117.6-7330",

abstract = "We report on the detection of pulsed, broadband, X-ray emission from the transient source RX J0117.6-7330. The pulse period of 22 s is detected by the ROSAT/PSPC instrument in a 1992 September 30-October 2 observation and by the Compton Gamma-Ray Observatory/BATSE instrument during the same epoch. Hard X-ray pulsations are detectable by BATSE for approximately 100 days surrounding the ROSAT observation (1992 August 28-December 8). The total directly measured X-ray luminosity during the ROSAT observation is 1.0 × 1038 (d/60 kpc)2 ergs s-1. The pulse frequency increases rapidly during the outburst, with a peak spin-up rate of 1.2 × 10-10 Hz s-1 and a total frequency change of 1.8%. The pulsed percentage is 11.3% from 0.1-2.5 keV, increasing to at least 78% in the 20-70 keV band. These results establish RX J0117.6-7330 as a transient Be binary system.",

keywords = "Accretion, accretion disks, Stars: individual (RX J0117.6-7330), X-rays: general",

author = "Macomb, {D. J.} and Finger, {M. H.} and Harmon, {B. A.} and Lamb, {R. C.} and Prince, {T. A.}",

year = "1999",

month = jun,

day = "20",

doi = "10.1086/312074",

language = "English",

volume = "518",

pages = "L99--L102",

number = "2 PART 2",

}

TY - JOUR

T1 - Discovery of pulsed X-ray emission from the small magellanic cloud transient RX J0117.6-7330

AU - Macomb, D. J.

AU - Finger, M. H.

AU - Harmon, B. A.

AU - Lamb, R. C.

AU - Prince, T. A.

PY - 1999/6/20

Y1 - 1999/6/20

N2 - We report on the detection of pulsed, broadband, X-ray emission from the transient source RX J0117.6-7330. The pulse period of 22 s is detected by the ROSAT/PSPC instrument in a 1992 September 30-October 2 observation and by the Compton Gamma-Ray Observatory/BATSE instrument during the same epoch. Hard X-ray pulsations are detectable by BATSE for approximately 100 days surrounding the ROSAT observation (1992 August 28-December 8). The total directly measured X-ray luminosity during the ROSAT observation is 1.0 × 1038 (d/60 kpc)2 ergs s-1. The pulse frequency increases rapidly during the outburst, with a peak spin-up rate of 1.2 × 10-10 Hz s-1 and a total frequency change of 1.8%. The pulsed percentage is 11.3% from 0.1-2.5 keV, increasing to at least 78% in the 20-70 keV band. These results establish RX J0117.6-7330 as a transient Be binary system.

AB - We report on the detection of pulsed, broadband, X-ray emission from the transient source RX J0117.6-7330. The pulse period of 22 s is detected by the ROSAT/PSPC instrument in a 1992 September 30-October 2 observation and by the Compton Gamma-Ray Observatory/BATSE instrument during the same epoch. Hard X-ray pulsations are detectable by BATSE for approximately 100 days surrounding the ROSAT observation (1992 August 28-December 8). The total directly measured X-ray luminosity during the ROSAT observation is 1.0 × 1038 (d/60 kpc)2 ergs s-1. The pulse frequency increases rapidly during the outburst, with a peak spin-up rate of 1.2 × 10-10 Hz s-1 and a total frequency change of 1.8%. The pulsed percentage is 11.3% from 0.1-2.5 keV, increasing to at least 78% in the 20-70 keV band. These results establish RX J0117.6-7330 as a transient Be binary system.

KW - Accretion, accretion disks

KW - Stars: individual (RX J0117.6-7330)

KW - X-rays: general

UR - http://www.scopus.com/inward/record.url?scp=0033587272&partnerID=8YFLogxK

U2 - 10.1086/312074

DO - 10.1086/312074

M3 - Article

AN - SCOPUS:0033587272

SN - 0004-637X

VL - 518

SP - L99-L102

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 PART 2

ER -

Discovery of pulsed X-ray emission from the small magellanic cloud transient RX J0117.6-7330

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this