Identification of 5 Interacting Binaries in the Galactic Bulge Survey

Abstract

We present optical lightcurves, spectroscopy, and classification of five X-ray sources in the Chandra Galactic Bulge Survey [CXOGBS J174009.1-284725 (CX5), CXOGBS J173935.7-272935 (CX18), CXOGBS J173946.9-271809 (CX28), CXOGBS J173729.1-292804 (CX37), CXOGBS J174607.6-261547 (CX561)]. These objects were selected based on bright optical counterparts which were quickly found to have emission lines in their optical spectra. This paper presents an illustration of GBS optical follow-up, targeting emission line objects. Of these five objects, four exhibit photometric variability in the Sloan r' band. CX5 shows a tentative period of 2.1 hours and is clearly an Intermediate Polar (IP). CX28 and CX37 both exhibit flickering with no clear period. Both are suggested to also be IPs. CX18 was observed to undergo 2 dwarf nova outbursts. Finally, CX561 shows no detectable variability, although its characteristics would be consistent with either a quiescent Low Mass X-ray Binary or Cataclysmic Variable.

11 pages, 5 figures

References in corpus (5)

• X-ray Properties of Black-Hole Binaries
• Advection-Dominated Accretion and the Black Hole Event Horizon
• Reddening and metallicity maps of the Milky Way bulge from VVV and 2MASS II. The complete high resolution extinction map and implications for Bulge studies
• Near-Infrared Counterparts to Chandra X-ray Sources toward the Galactic Center. I. Statistics and a Catalog of Candidates
• ChaMPlane Deep Galactic Bulge Survey. I. Faint accretion-driven binaries in the Limiting Window

Cited by in corpus (18)

• Magnetic White Dwarfs
• INTEGRAL/IBIS 17-yr hard X-ray all-sky survey
• The Swift Bulge Survey: Motivation, Strategy, and First X-ray Results
• The Galactic Bulge Survey: completion of the X-ray survey observations
• Identification of twenty-three accreting binaries in the Galactic Bulge Survey
• The OmegaWhite Survey for short period variable stars II: An overview of results from the first four years
• CXOGBS J174954.5-294335: A New Deeply-Eclipsing Intermediate Polar
• VLT/X-shooter spectroscopy of the candidate black-hole X-ray binary MAXI J1659-152 in outburst
• The X-ray Emissivity of Low-Density Stellar Populations
• The Relationship Between X-ray Luminosity and Duty Cycle for Dwarf Novae and their Specific Frequency in the Inner Galaxy
• Variability of Optical Counterparts in the Chandra Galactic Bulge Survey
• Near-infrared counterparts to the Galactic Bulge Survey X-ray source population
• Spectroscopic classification of X-ray sources in the Galactic Bulge Survey
• Gemini Spectroscopy of Galactic Bulge Sources: A Population of Hidden Accreting Binaries Revealed?
• Candidate Hα emission and absorption line sources in the Galactic Bulge Survey
• New transient Galactic bulge intermediate polar candidate XMMU J175035.2-293557
• Constraining the nature of the accreting binary in CXOGBS J174623.5-310550
• Searching for outliers in the Chandra Source Catalog