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J/AJ/127/2771      HST proper-motions of M4 main-sequence stars  (Richer+, 2004)

Hubble space telescope observations of the main sequence of M4. Richer H.B., Fahlman G.G., Brewer J., Davis S., Kalirai J., Stetson P.B., Hansen B.M.S., Rich R.M., Ibata R.A., Gibson B.K., Shara M. <Astron. J., 127, 2771-2792 (2004)> =2004AJ....127.2771R
ADC_Keywords: Clusters, globular ; Stars, dwarfs ; Proper motions Keywords: globular clusters: general - globular clusters: individual (M4) Abstract: We present new results from a photometric study of the main-sequence stars in M4 (NGC 6121=C1620-264), the closest globular cluster to the Sun. Multifield, multiepoch observations at approximately 1, 2, and 6 core radii were obtained with WFPC2 on the Hubble Space Telescope through either the F606W filter or the F555W (V) and F814W (I) filters. The multi-epoch observations allowed us to clean the data on the basis of proper motion and thus separate cluster from field stars or extragalactic objects. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 46 16 Exposure Record table4.dat 47 620 Annulus 1: Photometry and Astrometry table5.dat 47 1006 Annulus 2: Photometry and Astrometry table6.dat 47 623 Annulus 3: Photometry and Astrometry table7.dat 47 630 Annulus 4: Photometry and Astrometry
See also: J/ApJS/120/265 : HST photometry of M4 (Ibata+, 1999) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1 I1 --- Field Field number in radius core 3- 6 I4 yr Date Year of the observation 8- 11 I4 --- PID Program identification number of the observation 13- 17 A5 --- Filt Filter 19- 22 I4 s ExpTime Exposure time 24- 26 I3 --- Frames Number of frames 28- 46 A19 --- Com Comments
Byte-by-byte Description of file: table[4-7].dat
Bytes Format Units Label Explanations
1- 8 F8.4 deg RAdeg Right ascension in decimal degrees (J2000) 10- 17 F8.4 deg DEdeg Declination in decimal degrees (J2000) 19- 24 F6.3 mag F555W [19/34] The F555W-band magnitude 26- 31 F6.3 mag F814W [17/28] The F814W-band magnitude 33- 39 F7.3 mas/yr pmRA Right ascension proper motion times the cosine of the declination (1) 41- 47 F7.3 mas/yr pmDE Declination proper motion (1)
Note (1): Measured with respect to an extragalactic reference frame (Kalirai et al., 2003AJ....126.1402K).
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 08-Jul-2004
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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