Identification of 5 Interacting Binaries in the Galactic Bulge Survey
We present optical lightcurves, spectroscopy, and classification of five X-ray s ources in the Chandra Galactic Bulge Survey [CXOGBS J174009.1-284725 (CX5), CXOG BS J173935.7-272935 (CX18), CXOGBS J173946.9-271809 (CX28), CXOGBS J173729.1-292 804 (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 phot ometric variability in the Sloan $r'$ band. CX5 shows a tentative period of 2.1 hours and is clearly an 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 LMXB or CV.link to paper
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