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2016A&A...588A.128F - Astronomy and Astrophysics, volume 588A, 128-128 (2016/4-1)
Exploring the crowded central region of ten Galactic globular clusters using EMCCDs.
FIGUERA JAIMES R., BRAMICH D.M., SKOTTFELT J., KAINS N., JORGENSEN U.G., HORNE K., DOMINIK M., ALSUBAI K.A., BOZZA V., CALCHI NOVATI S., CICERI S., D'AGO G., GALIANNI P., GU S.-H., HARPSOE K.B.W., HAUGBOLLE T., HINSE T.C., HUNDERTMARK M., JUNCHER D., KORHONEN H., MANCINI L., POPOVAS A., RABUS M., RAHVAR S., SCARPETTA G., SCHMIDT R.W., SNODGRASS C., SOUTHWORTH J., STARKEY D., STREET R.A., SURDEJ J., WANG X.-B. and WERTZ O.
Abstract (from CDS):
Methods. Images were taken using the Danish 1.54-m Telescope at the ESO observatory at La Silla in Chile. The telescope was equipped with an electron-multiplying CCD, and the short-exposure-time images obtained (ten images per second) were stacked using the shift-and-add technique to produce the normal-exposure-time images (minutes). Photometry was performed via difference image analysis. Automatic detection of variable stars in the field was attempted.
Results. The light curves of 12541 stars in the cores of ten globular clusters were statistically analysed to automatically extract the variable stars. We obtained light curves for 31 previously known variable stars (3 long-period irregular, 2 semi-regular, 20 RR Lyrae, 1 SX Phoenicis, 3 cataclysmic variables, 1 W Ursae Majoris-type and 1 unclassified) and we discovered 30 new variables (16 long-period irregular, 7 semi-regular, 4 RR Lyrae, 1 SX Phoenicis and 2 unclassified). Fluxes and photometric measurements for these stars are available in electronic form through the Strasbourg astronomical Data Center.
Abstract Copyright: © ESO, 2016
Journal keyword(s): blue stragglers - galaxies: star clusters: general - globular clusters: general - stars: variables: RR Lyrae - novae, cataclysmic variables - instrumentation: high angular resolution
VizieR on-line data: <Available at CDS (J/A+A/588/A128): stars.dat table1.dat>
Nomenclature: Table 4: [FBS2016] NGC104 EMN N=7 (Nos EM1-EM7). Table 5: Cl* NGC 5139 SAW VNNN N=3 (Nos V457-V459) added. Table 6: Cl* NGC 5286 SAW VNN N=11 (Nos V63-V73) added, Table 7: Cl* NGC 6093 SAW VNN N=7 (Nos V34-V40) added. Table 9: Cl* NGC 6541 SAW VNN N=2 (Nos V21-V22) added, Table 11: Cl* NGC 6681 SAW VN N=1 (No V6) added.
CDS comments: Paragraph 8.4.1: V11 probably Cl* NGC 6093 DN 1. Paragraph 8.5: V81 = [KTR2013] V58 = Cl* NGC 6121 SAW V81 and V101 = [NBH2014] 3487 = Cl* NGC 6121 SAW V101. For objects Cl* NGC 5286 SAW V37 to V58, there is a ∼6 arcsec difference between coordinates from 2016A&A...588A.128F and coordinates from 2010AJ....139..357Z.
Simbad objects: 79
