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J/AJ/119/1748   WFPC 2 imaging of young LMC clusters    (Keller+, 2000)

Wide field planetary camera 2 imaging of young clusters in the Magellanic clouds. Keller S.C., Bessell M.S., Da Costa G.S. <Astron. J. 119, 1748 (2000)> =2000AJ....119.1748K
ADC_Keywords: Clusters, globular ; Colors ; HR diagrams ; Magellanic Clouds ; Photometry, ultraviolet Mission_Name: HST Keywords: galaxies: star clusters - Magellanic Clouds - stars: emission-line, Be - stars: evolution - ultraviolet emission Abstract: We have carried out Wide Field Planetary Camera 2 (WFPC2) F160BW, F555W, and F656N imaging of four young populous clusters: NGC 330, in the Small Magellanic Cloud, and NGC 1818, 2004, and 2100, in the Large Magellanic Cloud. We report photometric results for these four clusters, including identification using photometric colors of the cluster Be star population. We present theoretical WFPC2 and broadband colors and bolometric corrections for LMC and SMC metallicities. The use of the far-UV F160BW filter enables accurate determination of the effective temperatures for stars in the vicinity of the main-sequence turnoff and on the unevolved main sequence. Description: The data presented in this paper were obtained by HST using WFPC2 in 1997 June. Exposures in F555W, F160BW, and F656N were obtained. The F160BW filter (δλ = 446 Å, λeff = 1491 Å) is a wideband filter with negligible red leak. The imaging and transmission properties of the F160BW filter have been described by Watson et al. (1994ApJ...435L..55W). F656N is a narrowband filter (δλ = 22 Å) centered on the H line. Objects: -------------------------------------------- RA (2000) DE Designation(s) -------------------------------------------- 00 56.2 -72 29 NGC 330 = ESO 29- 24 05 04 14 -66 26.1 NGC 1818 = KMHK 491 05 30 40 -67 17.2 NGC 2004 = KMHK 991 05 42 08 -69 12.7 NGC 2100 = KMHK 1257 -------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 94 2859 *Photometry for NGC 330 table3.dat 94 852 Photometry for NGC 1818 table4.dat 94 1390 Photometry for NGC 2004 table5.dat 94 1037 Photometry for NGC 2100 table7a.dat 86 476 Grid of colors and bolometric corrections for solar abundance table7b.dat 86 410 Grid of colors and bolometric corrections for [Fe/H] = -0.5 table7c.dat 86 409 Grid of colors and bolometric corrections for [Fe/H] = -1.0
Note on table2.dat : some entries were added after the publication, see the "History" section below
See also: J/A+AS/108/571 : Photometry of the SMC cluster NGC 330 (Vallenari+, 1994) J/MNRAS/260/782 : CCD photometry of NGC 2004 and 2100 (Balona+ 1993) Byte-by-byte Description of file: table[2345].dat
Bytes Format Units Label Explanations
1 A1 --- Chip WFPC chip star is on 3- 6 I4 --- Number Star number 8- 13 F6.2 pix Xpix X pixel position 16- 21 F6.2 pix Ypix Y pixel position 24- 29 F6.3 mag F555 ? Magnitude in the F555W filter 32- 37 F6.3 mag F160 ? Magnitude in the F160BW filter 40- 45 F6.3 mag F656 ? Magnitude in the F656N filter 48- 53 F6.3 mag 160-555 ? The F160BW - F555W color 56- 61 F6.3 mag 555-656 ? The F555W - F656N color 64- 68 F5.3 [K] Log(T) ? Log of the effective temperature 72- 76 F5.3 [solLum] Log(L) ? Log of the luminosity in solar units 80- 94 A15 --- ID Other identifications (1)
Note (1): Identifiers with prefixes A, B, C, and D are the designations according to Robertson (1974A&AS...15..261R), those with prefix SW are from Sebo & Wood (1994AJ....108..932S), and those with prefix KWB are from Keller et al. (1999A&AS..134..489K).
Byte-by-byte Description of file: table7*.dat
Bytes Format Units Label Explanations
1- 5 I5 K Teff Effective Temperature 9- 12 F4.2 [cm/s2] log(g) Log of the surface gravity 17- 23 F7.3 mag Mbol Bolometric magnitude (1) 25- 30 F6.3 mag BC Bolometric correction at F555W filter (1) 33- 38 F6.3 mag F555 Magnitude of the F555W filter (1) 41- 46 F6.3 mag 160-555 The F160BW-F555W color (1) 49- 54 F6.3 mag 336-555 The F336W-F555W color (1) 57- 62 F6.3 mag 439-555 The F439W-F555W color (1) 65- 70 F6.3 mag 450-555 The F450W-F555W color (1) 73- 78 F6.3 mag 675-555 The F675W-F555W color (1) 81- 86 F6.3 mag 814-555 The F814W-F555W color (1)
Note (1): zero points adjusted to produce 0.04mag for all bands with the Castelli & Kurucz (1994A&A...281..817C, see </J/A+A/281/817>) spectrum of Vega
History: * 18-Apr-2000: From AJ electronic edition * 12-Jul-2000: following a message from the author () to CDS (Francois Ochsenbein), 9 more entries were added to table2 (photometry for NGC 330): on Chip#3, Numbers 15, 16, 20, 36, 41, 54, 58, 129; on Chip#4, Number 78.
(End) Greg Schwarz [AAS] 12-Jul-2000
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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