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J/AJ/110/1141        Variables in the Sagittarius dSph (Mateo+ 1995)

The Optical Gravitational Lensing Experiment: variable stars in the Sagittarius dwarf spheroidal galaxy Mateo M., Kubiak M., Szymanski M., Kaluzny J., Krzeminski W., Udalski A. <Astron. J. 110, 1141 (1995)> =1995AJ....110.1141M
ADC_Keywords: Gravitational lensing ; Photometry, CCD ; Stars, variable Abstract: We present time-series CCD photometry of a field in the newly discovered dwarf spheroidal galaxy in Sagittarius (hereafter Sgr), and of a nearby control field. These data, which consist of VI images obtained during the 1994 OGLE season, were used to identify and study variable stars in both fields. We discovered ten variable stars in the Sgr field, nine of which have light curves and periods consistent with RR Lyr stars or anomalous Cepheids. The control field contains four short-period contact eclipsing binaries, but no pulsating variables. The variables in the Sgr field include a bright RR Lyr star that is almost certainly located in front of Sgr in the galactic bulge, a short-period contact binary located near or within Sgr, and a short-period pulsating star that may either be a foreground halo RR Lyr star or an anomalous Cepheid within Sgr. The seven remaining variables in the Sgr field are RR Lyr stars with very similar mean apparent magnitudes; we conclude that they are members of Sgr. We estimate the total number of RR Lyr stars in Sgr to be 1930±730 if M(V,Sgr)=-13, or 310±120 if M(V,Sgr)=-11. The frequency of pulsating variables in Sgr is consistent with earlier conclusions that the galaxy consists of a predominant old (age≳10Gyr) population. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 19 06 11 -30 25 22 Sgr field 18 33 26 -40 57 57 Control field ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table5a.dat 211 49 V-band data for the Sgr-field variables table5b.dat 91 38 V-band data for the Control-field variables table5c.dat 211 42 I-band data for the Sgr-field variables table5d.dat 91 31 I-band data for the Control-field variables
Byte-by-byte Description of file: table5a.dat
Bytes Format Units Label Explanations
1- 11 F11.5 --- HJD Heliocentric Julian Date 13- 19 F7.3 mag VmagV1 []? Sgr V1 calibrated V magnitude 21- 25 F5.3 mag e_VmagV1 []? VmagV1 error 27- 31 F5.3 --- PhasV1 [0/1[? Sgr V1 phase 33- 39 F7.3 mag VmagV2 []? Sgr V2 calibrated V magnitude 41- 45 F5.3 mag e_VmagV2 []? VmagV2 error 47- 51 F5.3 --- PhasV2 [0/1[? Sgr V2 phase 53- 59 F7.3 mag VmagV3 []? Sgr V3 calibrated V magnitude 61- 65 F5.3 mag e_VmagV3 []? VmagV3 error 67- 71 F5.3 --- PhasV3 [0/1[? Sgr V3 phase 73- 79 F7.3 mag VmagV4 []? Sgr V4 calibrated V magnitude 81- 85 F5.3 mag e_VmagV4 []? VmagV4 error 87- 91 F5.3 --- PhasV4 [0/1[? Sgr V4 phase 93- 99 F7.3 mag VmagV5 []? Sgr V5 calibrated V magnitude 101-105 F5.3 mag e_VmagV5 []? VmagV5 error 107-111 F5.3 --- PhasV5 [0/1[? Sgr V5 phase 113-119 F7.3 mag VmagV6 []? Sgr V6 calibrated V magnitude 121-125 F5.3 mag e_VmagV6 []? VmagV6 error 127-131 F5.3 --- PhasV6 [0/1[? Sgr V6 phase 133-139 F7.3 mag VmagV7 []? Sgr V7 calibrated V magnitude 141-145 F5.3 mag e_VmagV7 []? VmagV7 error 147-151 F5.3 --- PhasV7 [0/1[? Sgr V7 phase 153-159 F7.3 mag VmagV8 []? Sgr V8 calibrated V magnitude 161-165 F5.3 mag e_VmagV8 []? VmagV8 error 167-171 F5.3 --- PhasV8 [0/1[? Sgr V8 phase 173-179 F7.3 mag VmagV9 []? Sgr V9 calibrated V magnitude 181-185 F5.3 mag e_VmagV9 []? VmagV9 error 187-191 F5.3 --- PhasV9 [0/1[? Sgr V9 phase 193-199 F7.3 mag VmagV10 []? Sgr V10 calibrated V magnitude 201-205 F5.3 mag e_VmagV10 []? VmagV10 error 207-211 F5.3 --- PhasV10 [0/1[? Sgr V10 phase
Byte-by-byte Description of file: table5b.dat
Bytes Format Units Label Explanations
1- 11 F11.5 --- HJD Heliocentric Julian Date 13- 19 F7.3 mag VmagV1c []? Control V1 calibrated V magnitude 21- 25 F5.3 mag e_VmagV1c []? VmagV1c error 27- 31 F5.3 --- PhasV1c [0/1[? Control V1 phase 33- 39 F7.3 mag VmagV2c []? Control V2 calibrated V magnitude 41- 45 F5.3 mag e_VmagV2c []? VmagV2c error 47- 51 F5.3 --- PhasV2c [0/1[? Control V2 phase 53- 59 F7.3 mag VmagV3c []? Control V3 calibrated V magnitude 61- 65 F5.3 mag e_VmagV3c []? VmagV3c error 67- 71 F5.3 --- PhasV3c [0/1[? Control V3 phase 73- 79 F7.3 mag VmagV4c []? Control V4 calibrated V magnitude 81- 85 F5.3 mag e_VmagV4c []? VmagV4c error 87- 91 F5.3 --- PhasV4c [0/1[? Control V4 phase
Byte-by-byte Description of file: table5c.dat
Bytes Format Units Label Explanations
1- 11 F11.5 --- HJD Heliocentric Julian Date 13- 19 F7.3 mag ImagV1 []? Sgr V1 calibrated I magnitude 21- 25 F5.3 mag e_ImagV1 []? ImagV1 error 27- 31 F5.3 --- PhasV1 [0/1[? Sgr V1 phase 33- 39 F7.3 mag ImagV2 []? Sgr V2 calibrated I magnitude 41- 45 F5.3 mag e_ImagV2 []? ImagV2 error 47- 51 F5.3 --- PhasV2 [0/1[? Sgr V2 phase 53- 59 F7.3 mag ImagV3 []? Sgr V3 calibrated I magnitude 61- 65 F5.3 mag e_ImagV3 []? ImagV3 error 67- 71 F5.3 --- PhasV3 [0/1[? Sgr V3 phase 73- 79 F7.3 mag ImagV4 []? Sgr V4 calibrated I magnitude 81- 85 F5.3 mag e_ImagV4 []? ImagV4 error 87- 91 F5.3 --- PhasV4 [0/1[? Sgr V4 phase 93- 99 F7.3 mag ImagV5 []? Sgr V5 calibrated I magnitude 101-105 F5.3 mag e_ImagV5 []? ImagV5 error 107-111 F5.3 --- PhasV5 [0/1[? Sgr V5 phase 113-119 F7.3 mag ImagV6 []? Sgr V6 calibrated I magnitude 121-125 F5.3 mag e_ImagV6 []? ImagV6 error 127-131 F5.3 --- PhasV6 [0/1[? Sgr V6 phase 133-139 F7.3 mag ImagV7 []? Sgr V7 calibrated I magnitude 141-145 F5.3 mag e_ImagV7 []? ImagV7 error 147-151 F5.3 --- PhasV7 [0/1[? Sgr V7 phase 153-159 F7.3 mag ImagV8 []? Sgr V8 calibrated I magnitude 161-165 F5.3 mag e_ImagV8 []? ImagV8 error 167-171 F5.3 --- PhasV8 [0/1[? Sgr V8 phase 173-179 F7.3 mag ImagV9 []? Sgr V9 calibrated I magnitude 181-185 F5.3 mag e_ImagV9 []? ImagV9 error 187-191 F5.3 --- PhasV9 [0/1[? Sgr V9 phase 193-199 F7.3 mag ImagV10 []? Sgr V10 calibrated I magnitude 201-205 F5.3 mag e_ImagV10 []? ImagV10 error 207-211 F5.3 --- PhasV10 [0/1[? Sgr V10 phase
Byte-by-byte Description of file: table5d.dat
Bytes Format Units Label Explanations
1- 11 F11.5 --- HJD Heliocentric Julian Date 13- 19 F7.3 mag ImagV1c []? Control V1 calibrated I magnitude 21- 25 F5.3 mag e_ImagV1c []? ImagV1c error 27- 31 F5.3 --- PhasV1c [0/1[? Control V1 phase 33- 39 F7.3 mag ImagV2c []? Control V2 calibrated I magnitude 41- 45 F5.3 mag e_ImagV2c []? ImagV2c error 47- 51 F5.3 --- PhasV2c [0/1[? Control V2 phase 53- 59 F7.3 mag ImagV3c []? Control V3 calibrated I magnitude 61- 65 F5.3 mag e_ImagV3c []? ImagV3c error 67- 71 F5.3 --- PhasV3c [0/1[? Control V3 phase 73- 79 F7.3 mag ImagV4c []? Control V4 calibrated I magnitude 81- 85 F5.3 mag e_ImagV4c []? ImagV4c error 87- 91 F5.3 --- PhasV4c [0/1[? Control V4 phase
Origin: AAS CD-ROM series, Volume 5, 1995 Lee Brotzman [ADS] 30-Oct-1995
(End) [CDS] 10-Jan-1996
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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