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J/ApJS/112/109 Rho Oph Near IR Positions and Photometry (Barsony+, 1997)
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A Near-Infrared Imaging Survey of the Rho Ophiuchi Cloud Core
Barsony M., Kenyon S.J., Lada E.A., Teuben P.J.
<Astrophys. J. Suppl. Ser. 112, 109 (1997)>
=1997ApJS..112..109B
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ADC_Keywords: Infrared sources ; Interstellar medium ; Photometry, infrared ;
Associations, stellar ; Selected areas ; Positional data
Description:
This catalog contains the tabulated results from a three-color (JHK)
near-Infrared imaging survey of the Rho Ophiuchi star-forming cloud
core. The NIR imaging observations were acquired using the SQIID
instrument on the Kitt Peak 1.3m telescope from June 4-10, 1993 and
April 23-28, 1994. The survey covered one square degree (2.2pc by
2.2pc). The catalog contains 4495 sources with both J2000.0 and
B1950.0 coordinates for each source and its J, H, and K magnitudes
and/or upper their limits. The Rho Ophiuchi clouds are of great
interest for star formation studies, since they include the nearest
example of a currently forming star cluster.
The absolute positions in RA and Dec were determined for each
individual source by using a centering algorithm in the IRAF package
APPHOT to obtain center positions in pixels which were then merged
into a single common positional grid. Absolute stellar coordinates
were determined by comparing the authors positional database with the
positions of 36 HST Guide Star Catalog stars spread out over the
survey field. These were used to determine a plate scale and rotation
which was used to generate the final list of source positions. The
position determination technique and the photometric data reduction
and calibration is discussed in detail in the source reference.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 74 10 Previous rho Oph near-infrared surveys
table2.dat 99 4495 Rho Oph NIR source positions and JHK photometry
table3.dat 122 451 Near-infrared cross identifications
tab3note.txt 80 31 Notes for table3.dat
table4.dat 140 8 Photometry Comparisons between surveys
table5.dat 55 13 Variable Sources
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Survey Survey designation (shortened)
8- 10 I3 --- Sources Number of sources
15- 20 F6.2 arcsec Res Spatial resolution
25- 29 I5 arcmin2 Area Area covered by survey (square arcminutes)
30 A1 --- n_Area *[ cd] Note on Area
34- 37 F4.1 mag limitK Limiting K magnitude of survey
43- 48 A6 --- colors Photometric bands covered
49 A1 --- n_colors *[ ab]Note on colors
52- 74 A23 --- ref Survey reference
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Note on n_Area:
(c) The 119 sources SKS detected refer only to sources which are confined
to the rho Oph A, rho Oph B, and rho Oph E/F cloud cores, comprising
less than half of their entire survey area.
(d) WLY conducted an IRAS-selected survey in the K band. They examined 42
fields of 1 square arcmin toward 26 IRAS sources.
Note on n_colors:
(a) VSSG published J photometry for 11 sources, H photometry for 28 sources,
and L photometry for four sources of their list and JHKL photometry of
eight sources from the list of GSS.
(b) Elias chose 50 sources with H-K > 0.7 for follow-up photometry at bands
other than K.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- BKLT_J Source BKLT J designation
14- 15 A2 --- Comp [ :AB] Source component
17- 18 I2 h RAh Right Ascension hours (J2000.0)
21- 22 I2 min RAm Right Ascension minutes (J2000.0)
24- 28 F5.2 s RAs Right Ascension seconds (J2000.0)
31 A1 --- DE- Declination sign (J2000.0)
32- 33 I2 deg DEd Declination degrees (J2000.0)
35- 36 I2 arcmin DEm Declination minutes (J2000.0)
39- 42 F4.1 arcsec DEs Declination seconds (J2000.0)
44- 45 I2 h RA1950h Right Ascension hours (B1950.0)
49- 50 I2 min RA1950m Right Ascension minutes (B1950.0)
52- 56 F5.2 s RA1950s Right Ascension seconds (B1950.0)
59 A1 --- DE1950- Declination sign (B1950.0)
60- 61 I2 deg DE1950d Declination degrees (B1950.0)
64- 65 I2 arcmin DE1950m Declination minutes (B1950.0)
67- 71 F5.2 arcsec DE1950s Declination seconds B1950.0)
73 A1 --- l_Jmag [ >]Limit flag on J magnitude
74- 78 F5.2 mag Jmag J magnitude
83 A1 --- l_Hmag [ >]Limit flag on H magnitude
84- 88 F5.2 mag Hmag H magnitude
94 A1 --- l_Kmag [ >]Limit flag on k magnitude
95- 99 F5.2 mag Kmag K magnitude
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- BKLT_J ?Source BKLT J designation
14- 15 A2 --- Comp [ :AB] Source component
19 A1 --- l_Jmag [ >]Limit flag on J magnitude
20- 24 F5.2 mag Jmag ?J magnitude
27 A1 --- l_Hmag [ >]Limit flag on H magnitude
28- 32 F5.2 mag Hmag ?H magnitude
35 A1 --- l_Kmag [ >]Limit flag on k magnitude
36- 40 F5.2 mag Kmag ?K magnitude
44- 49 A6 --- GY GY source identification
50- 51 A2 --- n_GY *Notes on GY
53- 57 A5 --- WL WL source identification
58 A1 --- n_WL *Notes on WL
61- 67 A7 --- VSSG VSSG source identification
68 A1 --- n_VSSG *Notes on VSSG
69- 74 A6 --- GSS GSS source identification
75 A1 --- n_GSS *Notes on GSS
77- 84 A8 --- Elias Elias source identification
85 A1 --- n_Elias *Notes on Elias
87- 94 A8 --- BBRCG BBRCG source identification
95- 96 A2 --- n_BBRCG *Notes on BBRCG
97-103 A7 --- CRBR CRBR source identification
104-106 A3 --- n_CRBR *Notes on CRBR
107-114 A8 --- SKS SKS source identification
115 A1 --- n_SKS *Notes on SKS
116-121 A6 --- WLY WLY source identification
122 A1 --- n_WLY *Notes on WLY
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Note on n_GY, n_WL, n_VSSG, n_GSS, n_Elias, n_BBRCG, n_CRBR, n_SKS, n_WLY:
See notes described in file "tab3note.txt".
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Survey Survey name(s)
14- 16 I3 --- Ntot Total number of sources detected
18- 20 I3 --- Nrec Number of sources recovered
23- 25 I3 --- N(K) Number of K measurements used in fit
28- 30 I3 --- N(H) ?Number of H measurements used in fit
33- 35 I3 --- N(J) ?Number of J measurements used in fit
38- 42 F5.2 mag A(K) Intercept of K band linear fit
45- 49 F5.2 mag sigmaA(K) One sigma error of A(K)
52- 56 F5.2 --- B(K) Slope of K band linear fit
59- 63 F5.2 --- sigmaB(K) One sigma error of B(K)
66- 70 F5.2 --- a(K) Absolute deviation about the K band fit
73- 77 F5.2 mag A(H) ?Intercept of H band linear fit
80- 84 F5.2 mag sigmaA(H) ?One sigma error of A(H)
87- 91 F5.2 --- B(H) ?Slope of H band linear fit
94- 98 F5.2 --- sigmaB(H) ?One sigma error of B(H)
101-105 F5.2 --- a(H) ?Absolute deviation about the H band fit
108-112 F5.2 mag A(J) ?Intercept of J band linear fit
115-119 F5.2 mag sigmaA(J) ?One sigma error of A(J)
122-126 F5.2 --- B(J) ?Slope of J band linear fit
129-133 F5.2 --- sigmaB(J) ?One sigma error of B(J)
136-140 F5.2 --- a(J) ?Absolute deviation about the J band fit
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- BKLT_J Source BKLT J designation
16- 20 F5.2 mag mean(K) Mean K magnitude
23- 26 F4.2 mag sigma(K) Standard deviation of K measurements
29- 33 F5.2 mag mean(H) Mean H magnitude
36- 39 F4.2 mag sigma(H) ?Standard deviation of H measurements
42- 46 F5.2 mag mean(J) ?Mean J magnitude
49- 52 F4.2 mag sigma(J) ?Standard deviation of J measurements
55 I1 --- N(K) Number of K band measurements
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History:
The file table2.dat contains corrections to the declinations as
provided by the authors.
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(End) James E. Gass [ADC/SSDOO] 08-Apr-1998