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J/AJ/111/1596            BV photometry in Fornax globulars (Smith+ 1996)

Fornax globular clusters 1 and 5: A confirmed extragalactic second parameter Pair Smith E.O., Neill J.D., Mighell K.J., Rich M. <Astron. J. 111, 1596 (1996)> =1996AJ....111.1596S
ADC_Keywords: Clusters, globular ; Photometry Abstract: We report new color-magnitude diagrams for Fornax globular clusters 1 and 5 where our data reaches V=24, below the horizontal branch. Using the index B-R/(B+V+R), a measure of the horizontal branch color, we find cluster 1 has a red (-0.50±0.10) and cluster 5 an intermediate color (-0.09±0.12) horizontal branch confirming the first extragalactic second parameter pair. The HB types are markedly redder than the Galactic globular clusters at [Fe/H]=-2. In globular cluster 1, we find 21 possible variable stars out of 41 horizontal branch stars. Cluster 1 has an anomalously low ratio of horizontal branch to red giant stars, which formally gives a helium abundance of 0.16<Y<0.22, depending on the assumptions used. For both clusters 1 and 5, and for the red horizontal branch in the field adjacent to cluster 5, V_HB = 21.25 ± 0.05. We give calibrated surface brightness profiles and measure new core and tidal radii for cluster 1 of 17.6" and 104" and for cluster 5 of <2" and 91", respectively. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 02 37 02 -34 11.0 Fornax cluster 1 = C 0235-344 02 42 21 -34 06.2 Fornax cluster 5 = C 0240-343 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 55 182 Fornax cluster 1 photometry table4.dat 55 253 Fornax cluster 5 photometry table.tex 66 489 AASTeX version of table3.dat and table4.dat
Byte-by-byte Description of file: table3.dat table4.dat
Bytes Format Units Label Explanations
1- 3 I3 --- ID Identification number 5- 11 F7.1 pix Xpos X coordinate 13- 19 F7.1 pix Ypos Y coordinate 21- 26 F6.2 mag Vmag V magnitude 28- 31 F4.2 mag e_Vmag Error in Vmag 33- 38 F6.2 mag Bmag B magnitude 40- 43 F4.2 mag e_Bmag Error in Bmag 45- 50 F6.2 mag B-V B-V color 52- 55 F4.2 mag e_B-V Error in B-V
Origin: AAS CD-ROM series, Volume 6, 1996 Lee Brotzman [ADS] 03-May-1996
(End) [CDS] 05-Sep-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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