CDROM/APJS/V91/P583 IMF for Massive Stars in Magellanic Clouds (Hill+ 1994) ================================================================================ The Initial Mass Function for Massive Stars in the Magellanic Cloud. I. UBV Photometry and Color-Magnitude Diagrams for 14 OB Associations Robert J. Hill, Barry F. Madore, & Wendy L. Freedman <1994, ApJS, 91, 583> =1994ApJS...91..583H ================================================================================ Abstract: UBV CCD photometry has been obtained for 14 OB associations in the Magellanic Clouds using the University of Toronto's 0.6 m telescope and the Carnegie Institution of Washington's 1.0 m reflector, both on Las Campanas, Chile. The data are presented and used to construct color-magnitude diagrams for the purposes of investigating the massive-star content of the associations. Keywords: Hertzsprung-Russell (H-R) diagram -- Magellanic Clouds -- open clusters and associations: general -- stars: early-type -- stars: luminosity function, mass function File Summary: -------------------------------------------------------------------------------- File Name Lrecl Records Explanations -------------------------------------------------------------------------------- table5.dat 54 500 UBV photometry for LH 4 table6.dat 54 448 UBV photometry for LH 54 table7.dat 54 794 UBV photometry for LH 58 table8.dat 54 349 UBV photometry for LH 83 table9.dat 54 566 UBV photometry for LH 87 table10.dat 54 486 UBV photometry for LH 93 table11.dat 54 440 UBV photometry for LH 111 table12.dat 54 541 UBV photometry for N24 table13.dat 54 361 UBV photometry for NGC 249 table14.dat 54 567 UBV photometry for NGC 261 table15.dat 54 554 UBV photometry for NGC 376 table16.dat 54 241 UBV photometry for NGC 456 table17.dat 54 408 UBV photometry for NGC 460 table18.dat 54 475 UBV photometry for NGC 465 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table5.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- ID Star ID in LH 4 6 1X --- --- Blank 7-12 F6.1 --- X X coordinate of star on CCD image in fig. 1a 13-18 F6.1 --- Y Y coordinate 19-25 F7.2 mag V V magnitude 26-30 F5.2 mag e_V Error in V 31-37 F7.2 mag B-V B-V color 38-42 F5.2 mag e_B-V Error in B-V 43-49 F7.2 mag U-B []? U-B color 50-54 F5.2 mag e_U-B []? Error in U-B -------------------------------------------------------------------------------- Byte-by-byte Description of file: table6.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- ID Star ID in LH 54 6 1X --- --- Blank 7-12 F6.1 --- X X coordinate of star on CCD image in fig. 1b 13-18 F6.1 --- Y Y coordinate 19-25 F7.2 mag V V magnitude 26-30 F5.2 mag e_V Error in V 31-37 F7.2 mag B-V B-V color 38-42 F5.2 mag e_B-V Error in B-V 43-49 F7.2 mag U-B []? U-B color 50-54 F5.2 mag e_U-B []? Error in U-B -------------------------------------------------------------------------------- Byte-by-byte Description of file: table7.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- ID Star ID in LH 58 6 1X --- --- Blank 7-12 F6.1 --- X X coordinate of star on CCD image in fig. 1c 13-18 F6.1 --- Y Y coordinate 19-25 F7.2 mag V V magnitude 26-30 F5.2 mag e_V Error in V 31-37 F7.2 mag B-V B-V color 38-42 F5.2 mag e_B-V Error in B-V 43-49 F7.2 mag U-B []? U-B color 50-54 F5.2 mag e_U-B []? Error in U-B -------------------------------------------------------------------------------- Byte-by-byte Description of file: table8.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- ID Star ID in LH 83 6 1X --- --- Blank 7-12 F6.1 --- X X coordinate of star on CCD image in fig. 1d 13-18 F6.1 --- Y Y coordinate 19-25 F7.2 mag V V magnitude 26-30 F5.2 mag e_V Error in V 31-37 F7.2 mag B-V B-V color 38-42 F5.2 mag e_B-V Error in B-V 43-49 F7.2 mag U-B []? U-B color 50-54 F5.2 mag e_U-B []? Error in U-B -------------------------------------------------------------------------------- Byte-by-byte Description of file: table9.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- ID Star ID in LH 87 6 1X --- --- Blank 7-12 F6.1 --- X X coordinate of star on CCD image in fig. 1e 13-18 F6.1 --- Y Y coordinate 19-25 F7.2 mag V V magnitude 26-30 F5.2 mag e_V Error in V 31-37 F7.2 mag B-V B-V color 38-42 F5.2 mag e_B-V Error in B-V 43-49 F7.2 mag U-B []? U-B color 50-54 F5.2 mag e_U-B []? Error in U-B -------------------------------------------------------------------------------- Byte-by-byte Description of file: table10.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- ID Star ID in LH 93 6 1X --- --- Blank 7-12 F6.1 --- X X coordinate of star on CCD image in fig. 1f 13-18 F6.1 --- Y Y coordinate 19-25 F7.2 mag V V magnitude 26-30 F5.2 mag e_V Error in V 31-37 F7.2 mag B-V B-V color 38-42 F5.2 mag e_B-V Error in B-V 43-49 F7.2 mag U-B []? U-B color 50-54 F5.2 mag e_U-B []? Error in U-B -------------------------------------------------------------------------------- Byte-by-byte Description of file: table11.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- ID Star ID in LH 111 6 1X --- --- Blank 7-12 F6.1 --- X X coordinate of star on CCD image in fig. 1g 13-18 F6.1 --- Y Y coordinate 19-25 F7.2 mag V V magnitude 26-30 F5.2 mag e_V Error in V 31-37 F7.2 mag B-V B-V color 38-42 F5.2 mag e_B-V Error in B-V 43-49 F7.2 mag U-B []? U-B color 50-54 F5.2 mag e_U-B []? Error in U-B -------------------------------------------------------------------------------- Byte-by-byte Description of file: table12.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- ID Star ID in N 24 6 1X --- --- Blank 7-12 F6.1 --- X X coordinate of star on CCD image in fig. 1h 13-18 F6.1 --- Y Y coordinate 19-25 F7.2 mag V V magnitude 26-30 F5.2 mag e_V Error in V 31-37 F7.2 mag B-V B-V color 38-42 F5.2 mag e_B-V Error in B-V 43-49 F7.2 mag U-B []? U-B color 50-54 F5.2 mag e_U-B []? Error in U-B -------------------------------------------------------------------------------- Byte-by-byte Description of file: table13.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- ID Star ID in NGC 249 6 1X --- --- Blank 7-12 F6.1 --- X X coordinate of star on CCD image in fig. 1i 13-18 F6.1 --- Y Y coordinate 19-25 F7.2 mag V V magnitude 26-30 F5.2 mag e_V Error in V 31-37 F7.2 mag B-V B-V color 38-42 F5.2 mag e_B-V Error in B-V 43-49 F7.2 mag U-B []? U-B color 50-54 F5.2 mag e_U-B []? Error in U-B -------------------------------------------------------------------------------- Byte-by-byte Description of file: table14.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- ID Star ID in NGC 261 6 1X --- --- Blank 7-12 F6.1 --- X X coordinate of star on CCD image in fig. 1j 13-18 F6.1 --- Y Y coordinate 19-25 F7.2 mag V V magnitude 26-30 F5.2 mag e_V Error in V 31-37 F7.2 mag B-V B-V color 38-42 F5.2 mag e_B-V Error in B-V 43-49 F7.2 mag U-B []? U-B color 50-54 F5.2 mag e_U-B []? Error in U-B -------------------------------------------------------------------------------- Byte-by-byte Description of file: table15.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- ID Star ID in NGC 376 6 1X --- --- Blank 7-12 F6.1 --- X X coordinate of star on CCD image in fig. 1k 13-18 F6.1 --- Y Y coordinate 19-25 F7.2 mag V V magnitude 26-30 F5.2 mag e_V Error in V 31-37 F7.2 mag B-V B-V color 38-42 F5.2 mag e_B-V Error in B-V 43-49 F7.2 mag U-B []? U-B color 50-54 F5.2 mag e_U-B []? Error in U-B -------------------------------------------------------------------------------- Byte-by-byte Description of file: table16.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- ID Star ID in NGC 456 6 1X --- --- Blank 7-12 F6.1 --- X X coordinate of star on CCD image in fig. 1l 13-18 F6.1 --- Y Y coordinate 19-25 F7.2 mag V V magnitude 26-30 F5.2 mag e_V Error in V 31-37 F7.2 mag B-V B-V color 38-42 F5.2 mag e_B-V Error in B-V 43-49 F7.2 mag U-B []? U-B color 50-54 F5.2 mag e_U-B []? Error in U-B -------------------------------------------------------------------------------- Byte-by-byte Description of file: table17.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- ID Star ID in NGC 460 6 1X --- --- Blank 7-12 F6.1 --- X X coordinate of star on CCD image in fig. 1m 13-18 F6.1 --- Y Y coordinate 19-25 F7.2 mag V V magnitude 26-30 F5.2 mag e_V Error in V 31-37 F7.2 mag B-V B-V color 38-42 F5.2 mag e_B-V Error in B-V 43-49 F7.2 mag U-B []? U-B color 50-54 F5.2 mag e_U-B []? Error in U-B -------------------------------------------------------------------------------- Byte-by-byte Description of file: table18.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- ID Star ID in NGC 465 6 1X --- --- Blank 7-12 F6.1 --- X X coordinate of star on CCD image in fig. 1n 13-18 F6.1 --- Y Y coordinate 19-25 F7.2 mag V V magnitude 26-30 F5.2 mag e_V Error in V 31-37 F7.2 mag B-V B-V color 38-42 F5.2 mag e_B-V Error in B-V 43-49 F7.2 mag U-B []? U-B color 50-54 F5.2 mag e_U-B []? Error in U-B -------------------------------------------------------------------------------- ================================================================================ (End) Lee Brotzman [ADS] 25-Apr-1994