J/MNRAS/370/435 Proper motions near the Baade window (Kozlowski+, 2006)
Mapping stellar kinematics across the Galactic bar: HST measurements of proper
motions in 35 fields.
Kozlowski S., Wozniak P.R., Mao S., Smith M.C., Sumi T., Vestrand W.T.,
Wyrzykowski L.
<Mon. Not. R. Astron. Soc. 370, 435 (2006)>
=2006MNRAS.370..435K 2006MNRAS.370..435K
ADC_Keywords: Stars, nearby ; Photometry ; Proper motions
Keywords: gravitational lensing - Galaxy: bulge - Galaxy: disc -
Galaxy: kinematics and dynamics
Abstract:
We present a proper motion mini-survey of 35 fields in the vicinity of
Baade window, (l, b) = (1°, 4°), sampling roughly a 5x2.5deg2
region of the Galactic bar. Our second epoch observations collected
with the Advanced Camera for Surveys/High Resolution Channel
instrument onboard the Hubble Space Telescope were combined with the
archival Wide Field Planetary Camera 2/PC images. The resulting time
baselines are in the range of 4 to 8yr. Precise proper motions of
15863 stars were determined in the reference frame defined by the mean
motion of stars with magnitudes between IF814W=16.5 and 21.5 along
the line of sight.
Description:
The first epoch images (selected from the HST archive) were all taken
with the WFPC2/PC camera, and cover the time interval 1996-2000. The
second epoch data come from our own SNAP programme (cycle 13; proposal
ID 10198) and were collected in 2004 and 2005 using the High
Resolution Channel (HRC) of the Advanced Camera for Surveys (ACS).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 80 35 Log of the HST observations
table2.dat 68 37 Results of our proper motion mini-survey
photom.dat 140 25060 Fields photometry (Version of 08-Jun-2006)
--------------------------------------------------------------------------------
See also:
J/ApJ/562/337 : High proper-motion stars from MACHO (Alcock+, 2001)
II/213 : OGLE Galactic Bulge periodic variables (Udalski+ 1996)
J/AcA/50/1 : OGLE microlensing events in Galactic Bulge (Udalski+, 2000)
J/MNRAS/348/1439 : OGLE II Galactic center proper motions (Sumi+, 2004)
J/MNRAS/349/1059 : OGLE variables in Galactic bar (Wray+, 2004)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Field Field designation
17- 18 I2 h RAh Right ascension (J2000)
20- 21 I2 min RAm Right ascension (J2000)
23- 28 F6.3 s RAs Right ascension (J2000)
30 A1 --- DE- Declination sign (J2000)
31- 32 I2 deg DEd Declination (J2000)
34- 35 I2 arcmin DEm Declination (J2000)
37- 41 F5.2 arcsec DEs Declination (J2000)
43- 49 F7.2 yr Epoch1 Epoch of first F814W exposure (YYYY.yy)
51 I1 --- o_ExpI1 Number of exposures
52 A1 --- --- [x]
53- 55 I3 s ExpI1 Exposure time of first F814W exposure
57 I1 --- o_ExpV ? Number of F555W exposures
58 A1 --- --- [x]
59- 61 I3 s ExpV ? Exposure time of F555W exposures
63- 66 I4 --- PropID1 First epoch proposal ID
68- 74 F7.2 yr Epoch2 Epoch of second F814W exposure (YYYY.yy)
76 I1 s o_ExpI2 Number of exposures
77 A1 --- --- [x]
78- 80 I3 s ExpI2 Exposure time of second F814W exposure
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Field Field designation
17 A1 --- n_Field [*] Note on Field (1)
19- 22 F4.2 deg GLON Galactic longitude
24- 27 F4.2 deg GLAT Galactic latitude
29- 32 F4.2 mas/yr pmGLON Longitudinal Proper motion
34- 37 F4.2 mas/yr e_pmGLON Uncertainty on longitudinal proper motion
39- 42 F4.2 mas/yr pmGLAT Latitudinal proper motion
44- 47 F4.2 mas/yr e_pmGLAT Uncertainty on latitudinal proper motion
49- 53 F5.2 --- CIb Dimensionless correlation coefficient Cib
55- 58 F4.2 --- e_CIb Uncertainty on CIb
60- 64 F5.3 yr DT Time baseline
66- 68 I3 --- Nstars Number of stars used to estimate the
kinematics
--------------------------------------------------------------------------------
Note (1): KR-BW and KR-SgrI are the Baade window and the Sagittarius-I field,
respectively, from Kuijken & Rich (2002AJ....124.2054K 2002AJ....124.2054K)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: photom.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Field Field designation
17- 24 F8.4 deg GLON Galactic longitude
25- 32 F8.4 deg GLAT Galactic latitude
34- 42 F9.5 deg RAdeg Right Ascension J2000.0 in decimal degrees
44- 52 F9.5 deg DEdeg Declination J2000.0 in decimal degrees
54- 60 F7.3 mas/yr pmGLON Longitudinal proper motion
62- 68 F7.3 mas/yr pmGLAT Latitudinal proper motion
71- 76 F6.3 mas/yr e_pm Uncertainty of a proper motion
(same for pmGLON and pmGLAT)
78- 85 F8.3 pix Xpos1 X position on the chip for first epoch (WFPC2)
87- 94 F8.3 pix Ypos1 Y position on the chip for first epoch (WFPC2)
96-103 F8.3 pix Xpos2 X position on the chip for second epoch
(ACS / WFPC2)
105-112 F8.3 pix Ypos2 Y position on the chip for second epoch
(ACS / WFPC2)
114-119 F6.3 mag Imag I magnitude (F814W) in VEGA magnitude system
122-126 F5.3 mag e_Imag Uncertainity of Imag
127-133 F7.3 mag Vmag ?=-99.99 V magnitude (F555W) in VEGA system
134-140 F7.3 mag e_Vmag ?=-99.99 uncertainty of Vmag
--------------------------------------------------------------------------------
History:
* 10-Nov-2006: From electronic version of the journal
* 11-Jan-2007: Declination signs corrected in table1.dat (- instead of +).
Table photom.dat reformatted (floating-point numbers
replaced by fixed-point values)
(End) Patricia Vannier, Francois Ochsenbein [CDS] 10-Nov-2006