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J/ApJ/613/393     X-ray and radio sources in ρ Oph Core A     (Gagne+, 2004)

Simultaneous Chandra and very large array observations of young stars and protostars in ρ Ophiuchus Cloud Core A. Gagne M., Skinner S.L., Daniel K.J. <Astrophys. J., 613, 393-415 (2004)> =2004ApJ...613..393G
ADC_Keywords: X-ray sources ; Radio sources ; Molecular clouds ; Infrared sources Keywords: infrared: stars - ISM: individual (ρ Ophiuchi Cloud) - radio continuum: stars - stars: formation - stars: pre-main-sequence - X-rays: stars Abstract: A 96ks Chandra X-ray observation of ρ Ophiuchus cloud core A detected 87 sources, of which 60 were identified with counterparts at other wavelengths. Simultaneous multifrequency Very Large Array (VLA) observations detected 31 radio sources at 6cm, of which 10 were also detected by Chandra. We report new radio detections of the optically invisible IR source WLY 2-11 and the faint Hα emission line star Elias 24 (class II). Description: Chandra observed the Ophiuchus cloud A (L1688; Lynds 1962, Cat. VII/7) continuously for 96.5ks, beginning at 2335 UT on 2000 May 15 and ending at 0319 UT on May 17. Multifrequency radio observations of Oph core A were obtained simultaneously with Chandra on 2000 May 16 using the NRAO Very Large Array. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 97 87 Chandra X-ray sources in ρ Oph Core A table3.dat 74 31 VLA 6cm radio sources in ρ Oph Core A notes.dat 80 40 Notes table4.dat 132 56 X-ray sources in ρ Oph Core A with JHK photometry
See also: J/A+A/359/113 : X-ray and IR study of Rho Oph dark cloud (Grosso+, 2000) J/A+A/429/963 : XMM-Newton observation of the rho Oph cloud (Ozawa+, 2005) J/ApJS/112/109 : Rho Oph Near-IR Positions and Photometry (Barsony+, 1997) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 16 A16 --- GDS The GDS J2000 IAU designation 18 A1 --- f_GDS [a] indicates simultaneously detected with the VLA, in table3.dat 20- 21 I2 h RAh Hour of Right Ascension (J2000) (1) 23- 24 I2 min RAm Minute of Right Ascension (J2000) (1) 26- 30 F5.2 s RAs Second of Right Ascension (J2000) (1) 32 A1 --- DE- Sign of the Declination (J2000) (1) 33- 34 I2 deg DEd Degree of Declination (J2000) (1) 36- 37 I2 arcmin DEm Arcminute of Declination (J2000) (1) 39- 42 F4.1 arcsec DEs Arcsecond of Declination (J2000) (1) 44- 50 F7.1 ct Cts Net counts (background subtracted) 52- 56 F5.1 ct e_Cts The 1σ error in Cts 58- 62 F5.2 --- KS Kolmogorov-Smirnov variability statistic (2) 64- 67 F4.2 keV E Event file mean photon energy 69- 74 F6.2 [mW/m2] logFX Log of the absorbed 0.5-7keV flux in units of erg/cm2/s (see section 3.1) 76 A1 --- f_IRName [c] Flag on IRName (3) 78- 96 A19 --- IRName Probable IR/Radio counterpart (4)
Note (1): Chandra X-ray position with astrometric correction applied. Note (2): Variable sources have KS>1. Note (3): "c" indicates that the identification as LFAM 6 is uncertain due to an offset of ∼2.4" between the X-ray coordinates and precessed LFAM coordinates. Note (4): The probable counterpart uses the abbreviations: DoAr = Dolidze & Arakelian (1959AZh....36..444D); GSS = Grasdalen et al. (1973ApJ...184L..53G); VSSG = Vrba et al. (1975ApJ...197...77V); Elias = Elias (1978ApJ...224..453E); LFAM = Leous et al. (1991ApJ...379..683L); GY = Greene & Young (1992ApJ...395..516G); SKS = Strom et al. (1995, Cat. J/ApJ/438/813); BKLT = Barsony et al. (1997, Cat. J/ApJS/112/109).
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 16 A16 --- GDS The GDS J2000 IAU designation 17 A1 --- n_GDS [*] indicates a note detailed in notes.dat 19 A1 --- f_GDS [d] Indicates outside the Chandra FOV 21- 22 I2 h RAh Hour of Right Ascension (J2000) 24- 25 I2 min RAm Minute of Right Ascension (J2000) 27- 31 F5.2 s RAs Second of Right Ascension (J2000) 33 A1 --- DE- Sign of the Declination (J2000) 34- 35 I2 deg DEd Degree of Declination (J2000) 37- 38 I2 arcmin DEm Arcminute of Declination (J2000) 40- 43 F4.1 arcsec DEs Arcsecond of Declination (J2000) 45- 49 I5 uJy SPeak Peak 6cm flux density 51 A1 --- f_SPeak [v] Indicates a variable flux 53- 57 I5 uJy STotal Total 6cm flux density (1) 59- 60 I2 uJy RMS The RMS noise in units of muJy/beam (2) 62- 69 A8 --- Ident Identification name (3) 71- 73 A3 --- Class The SED Classification (4)
Note (1): VLA data (C-configuration) are from cleaned maps and fluxes are corrected for primary beam attenuation. Total flux is the average of the values measured using IMFIT (Gaussian fit) and TVSTAT (pixel summation). Note (2): Measured in immediate vicinity of source. Typical 6cm radio position uncertainties are ±0.05s in RA and ±0.7" in DEC. Note (3): The identification abbreviations are: LFAM = Leous et al. (1991ApJ...379..683L); SFAM = Stine et al. (1988AJ.....96.1394S); WLY = Wilking et al. (1989ApJ...340..823W); WSB = Wilking et al. (1987AJ.....94..106W). Note (4): Designations in order of preference are: Wilking et al. (2001ApJ...551..357W, 1999AJ....117..469W); Luhman & Rieke (1999ApJ...525..440L); Strom et al. (1995, Cat. J/ApJ/438/813), Greene et al. (1994ApJ...434..614G); Andre & Montmerle (1994ApJ...420..837A).
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 16 A16 --- GDS The GDS J2000 IAU designation 19- 80 A62 --- Note Note
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 16 A16 --- GDS The GDS J2000 IAU designation 18- 36 A19 --- Name The IR/Optical Designation 38 A1 --- f_Name [b] Indicates Name is a brown dwarf candidate 40- 46 A7 --- Survey Previous survey 48 A1 --- l_Jmag Limit flag on Jmag 49- 53 F5.2 mag Jmag The J band magnitude (1) 55 A1 --- l_Hmag Limit flag on Hmag 56- 60 F5.2 mag Hmag The H band magnitude (1) 62- 66 F5.2 mag Kmag The K band magnitude (1) 68- 72 F5.2 [-] logFX/FK Log of X-ray/K-band flux ratio 74- 76 A3 --- SED SED classification (2) 78- 81 F4.1 mag AV ? The V band extinction 83 A1 --- f_AV [c] Flag on AV (3) 85- 88 F4.2 10+22/cm2 NH Hydrogen column density 90 A1 --- f_NH [e] Flag on NH (4) 92- 96 F5.2 10+22/cm2 E_NH ? Upper error in NH (5) 98-101 F4.2 10+22/cm2 e_NH ? Lower error in NH (5) 103-106 F4.2 [K] logT Log of the temperature 108-111 F4.2 [K] E_logT Upper error in logT (5) 113-116 F4.2 [K] e_logT Lower error in logT (5) 118-122 F5.2 [10-7W] logL Log of the unabsorbed 0.5-7keV luminosity assuming d=165pc and in units of erg/s 124-127 F4.2 [10-7W] E_logL Upper error in logL (5) 129-132 F4.2 [10-7W] e_logL Lower error in logL (5)
Note (1): All JHK photometry from Barsony et al. (1997, Cat. J/ApJS/112/109) except Oph S1 B, K=8.3 (Simon et al. 1995ApJ...443..625S). Note (2): SED classification, defined as follows: D = double peaked spectrum; F = flat spectrum. Note (3): "c" indicates that near-IR measurements give AV∼27mag, Castelaz et al. (1985ApJ...290..261C). Note (4): "e" indicates that NH is estimated from AV assuming 1.57E21cm-2. Note (5): The quoted errors are internal errors only based on the non-parametric method described in Appendix B. Additional errors due to systematic effects such as distance and AV uncertainties are not included.
History: From electronic version On 27-Sep-2005, J162634.2-242328 modified into J162634.1-242328 in table3 J162603.0-242335 modified into J162603.0-242336 in notes
(End) Patricia Vannier [CDS] 14-Oct-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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