J/A+AS/125/337 New variables in NGC 288 (Kaluzny+ 1997)
New variable stars in the globular cluster NGC 288
Kaluzny J., Krzeminski W., Nalezyty M.
<Astron. Astrophys. Suppl. Ser. 125, 337 (1997)>
=1997A&AS..125..337K 1997A&AS..125..337K (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, globular ; Stars, variable
Keywords: globular clusters: individual: NGC 288 - stars: variables: other -
blue stragglers - stars: horizontal-branch - binaries: close
Abstract:
We report discovery of 3 new faint variables in the globular cluster
NGC 288: 2 SX Phe stars and 1 contact binary. Both SX Phe variables
are blue stragglers. The contact binary is located below cluster
turnoff, slightly to the red of the main sequence. New photometry of 6
previously known variables is also presented. We note that 26 out of a
total 43 SX Phe stars identified recently in ω Cen and NGC 288
exhibit V-band light curves with full amplitudes smaller than 0.10mag.
The sample of known SX Phe stars is likely to be significantly
incomplete in regard to the low amplitude variables.
Objects:
-----------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------
00 52 46.64 -26 34 07.4 NGC 288 V2
00 52 40.21 -26 32 28.8 NGC 288 V3
00 52 42.80 -26 34 45.4 NGC 288 V4
00 52 44.98 -26 33 52.1 NGC 288 V5
00 52 42.40 -26 34 54.6 NGC 288 V6
00 52 41.39 -26 33 59.7 NGC 288 V7
00 52 44.27 -26 33 59.6 NGC 288 V8
00 52 42.88 -26 34 09.6 NGC 288 V9
00 52 47.86 -26 33 01.9 NGC 288 V10
-----------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2 26 297 V-band light curve of variable V2
table3 26 190 V-band light curve of variable V3
table4 26 430 V-band light curve of variable V4
table5 26 416 V-band light curve of variable V5
table6 26 419 V-band light curve of variable V6
table7 26 278 V-band light curve of variable V7
table8 26 396 V-band light curve of variable V8
table9 26 410 V-band light curve of variable V9
table10 26 332 V-band light curve of variable V10
--------------------------------------------------------------------------------
Byte-by-byte Description of files: table*
-------------------------------------------------------------------------------
Bytes Format Units Label Explanations
-------------------------------------------------------------------------------
1- 12 F12.4 d HJD Heliocentric Julian date
14- 19 F6.3 mag Vmag V magnitude
22- 26 F5.3 mag e_Vmag Error of V magnitude
-------------------------------------------------------------------------------
Acknowledgements: Janusz Kaluzny
(End) Janusz Kaluzny 18-Nov-1997