Evidence for a 2-h optical modulation in GS 1826-24
نویسندگان
چکیده
منابع مشابه
Evidence for a 2 hr Optical Modulation in GS 1826 - 24
We report the discovery of a 2.1hr optical modulation in the transient source GS182624, based on two independent high time-resolution photometric observing runs. There is additional irregular variability on shorter timescales. The source also exhibited an optical burst during each observation, with peak fluxes consistent with those of the three X-ray bursts so far detected by BeppoSAX. We compa...
متن کاملX - ray / Optical Bursts from GS 1826 – 24
We report results from the first simultaneous X-ray (RXTE) and optical (SAAO) observations of the low-mass X-ray binary GS 1826–24 in June 1998. A type-I burst was detected in both X-ray and optical wavelengths. Its energy-dependent profile, energetics and spectral evolution provide evidence for an increase in the X-ray burning area but not for photospheric radius expansion. However, we may sti...
متن کاملClocked Bursts From GS 1826 - 238
We report on the long term monitoring of the GINGA transient source GS 1826-238 performed with the BeppoSAX Wide Field Camera (WFC) instrument, during four different observing campaigns covering October 1996 September 1999. WFC detection of type-I bursting activity from the source ruled out its proposed Black Hole candidacy and clearly suggested the compact object related to GS 1826-238 to be a...
متن کاملBursts from Gs 1826-238: a Clocked Thermonuclear Flashes Generator
The transient X-ray source GS 1826-238 was monitored during five different observing periods between August 1996 and October 1998 with the BeppoSAX Wide Field Camera instrument in the framework of a deep observation of the Galactic Center region. A first detection of X-ray bursts from this source occurred, ruling out its previously suggested black hole candidacy and strongly suggesting the comp...
متن کاملPeriodic Thermonuclear X-ray Bursts from Gs 1826−24 and the Fuel Composition as a Function of Accretion Rate
We analyze 24 type I X-ray bursts from GS 1826−24 observed by the Rossi X-ray Timing Explorer between 1997 November and 2002 July. The bursts observed between 1997–98 were consistent with a stable recurrence time of 5.74 ± 0.13 hr. The persistent intensity of GS 1826−24 increased by 36% between 1997–2000, by which time the burst interval had decreased to 4.10± 0.08 hr. In 2002 July the recurren...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1998
ISSN: 0035-8711,1365-2966
DOI: 10.1046/j.1365-8711.1998.01656.x