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J/ApJ/445/280       ROSAT survey of the Orion nebula region (Gagne+ 1995)

Deep ROSAT HRI observations of the Orion nebula region. Gagne M., Caillault J.-P., Stauffer J.R. <Astrophys. J. 445, 280 (1995)> =1995ApJ...445..280G (SIMBAD/NED BibCode)
ADC_Keywords: X-ray sources ; Nebulae Mission_Name: ROSAT Keywords: ISM: individual (Orion Nebula) - star: pre-main-sequence - X-rays: stars Description: We present results from three deep ROSAT high-resolution imager observations of the Orion Nebula star-forming region. The X-ray images contain over 1500 catalogued stars in a roughly 0.8deg2 region centered on the Trapezium. In all, 389 distinct X-ray sources have been detected, at least two-thirds of which are associated with a single proper-motion cluster member. X-ray emission is detected from stars of all spectral types, from the massive O- and B-type components of the Trapezium to the coolest, low-mass pre-main-sequence (PMS) stars. In this paper, we focus primarily on X-ray emission from the late-type PMS stars. Of the ∼100 late-type cluster members with measured spectral types, approximately three-fourths have been detected; we have derived X-ray luminosity upper limits for the remaining stars. We found coronal X-ray emission turns on around spectral type F6, with the upper envelope of activity increasing with decreasing effective temperature. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2 68 389 Orion Nebula X-ray sources table2.tex 194 439 LaTeX version of table2 table3 72 50 X-ray sources with multiple candidate optical counterparts table3.tex 229 93 LaTeX version of table3 table6 85 175 Optical and X-ray data for Group 1 stars table6.tex 192 257 LaTeX version of table6
See also: II/171 : Parenago catalogue in the area of the Orion nebula (1954) II/36 : UBV & uvby-beta obs. of Orion OB1 Association (Warren+ 1977) J/ApJ/437/361 : Einstein survey of the Orion nebula region (Gagne+ 1994) Byte-by-byte Description of file: table2
Bytes Format Units Label Explanations
1- 3 I3 --- NoX [1/389]+ X-ray number 5- 6 I2 h RAh Right ascension J2000 8- 9 I2 min RAm Right ascension J2000 11- 14 F4.1 s RAs Right ascension J2000 16 A1 --- DE- Declination sign 17 I1 deg DEd Declination J2000 19- 20 I2 arcmin DEm Declination J2000 22- 23 I2 arcsec DEs Declination J2000 25- 31 F7.5 ct/s Count Corrected ROSAT HRI count rate 33- 39 F7.5 ct/s e_Count rms uncertainty on Count 40 A1 --- Mult [*] * indicates multiple candidate optical counterparts. See table3 41- 45 A5 --- Par Parenago (1954) optical counterpart candidate designation 48- 52 A5 --- J&W Jones & Walker (1988) optical counterpart candidate designation 54- 58 A5 --- Var Variable optical counterpart candidate designation 60- 61 I2 --- Prob ? Membership probability 63- 64 I2 arcsec DRA ? Offset in right ascension 66- 67 I2 arcsec DDE ? Offset in declination
Byte-by-byte Description of file: table3
Bytes Format Units Label Explanations
1- 3 I3 --- NoX [1/389]+ X-ray number 5- 9 A5 --- Par1 Parenago designation of the first candidate 11- 16 A6 --- J&W1 Jones & Walker (1988) name of the first candidate 18- 19 I2 --- Prob1 ? Membership probability of the first candidate 21- 22 I2 arcsec DRA1 Offset in right ascension of the first candidate 24- 25 I2 arcsec DDE1 Offset in declination of the first candidate 28- 32 A5 --- Par2 Parenago designation of the second candidate 34- 39 A6 --- J&W2 Jones & Walker (1988) name of the second candidate 41- 42 I2 --- Prob2 ? Membership probability of the second candidate 44- 45 I2 arcsec DRA2 Offset in right ascension of the second candidate 47- 48 I2 arcsec DDE2 Offset in declination of the second candidate 50- 54 A5 --- Par3 Parenago designation of the third third candidate 56- 61 A6 --- J&W3 Jones & Walker (1988) name of the third candidate 63- 64 I2 --- Prob3 ? Membership probability of the third candidate 66- 67 I2 arcsec DRA3 ? Offset in right ascension of the third candidate 69- 70 I2 arcsec DDE3 ? Offset in declination of the first candidate
Byte-by-byte Description of file: table6
Bytes Format Units Label Explanations
1- 5 A5 --- Name Star name 7- 9 I3 --- NoX [1/389]? X-ray number 11- 19 A9 --- Sp Spectral type 21- 25 F5.3 [K] logTeff ? Effective temperature 26 A1 --- u_logTeff Uncertainty flag on logTeff 28- 32 F5.2 mag Bmag ? B magnitude 34- 38 F5.2 mag Vmag ? V magnitude 40- 44 F5.2 mag Icmag ? Ic (Cousins system) magnitude 46- 49 F4.2 mag AV Visual extinction (1) 50 A1 --- n_AV [)] ')' when AV=0.25mag (1) 52 A1 --- l_vsini Limit flag on vsini 53- 55 I3 km/s vsini ? Spectroscopic rotation velocity 57- 61 F5.2 d Prot ? Rotational period 63 A1 --- l_logLX Limit flag on logLX 64- 68 F5.2 [10-7J] logLX X-ray luminosity 70 A1 --- l_logLX/Lbol Limit flag on logLX/Lbol 71- 75 F5.2 --- logLX/Lbol ? X-ray luminosity versus bolometric luminosity 76 A1 --- u_logLX/Lbol Uncertainty flag on logLX/Lbol 78- 84 A7 --- Note Notes (2)
Note (1): When accurate absorption values are available from published estimates, photometric E(B-V) measurements, or the CHbeta extinction map of the nebula, they are listed in this column. Otherwise we assume moderate absorption (AV∼0.25mag) and indicate the value with a ')' in column n_AV Note (2): a: Position and proper-motion membership probability from McNamara et al. (1989) b: Position and proper-motion membership probability from Jones & Walker (1988) c: Position and proper-motion membership probability from van Altena et al. (1988) d: Proper-motion membership probability from McNamara & Huels (1983) e: Spectral type, V and Ic band photometry from Edwards et al. (1993) f: Spectral type from Strom (1993) g: Spectral type, B and V band photometry from Duncan (1993) h: Spectral type from Abt, Wang, & Cardona (1991) i: Spectral type from van Altena et al. (1988) j: Spectral type from the General Catalogue of Variable Stars (Kholopov et al. 1985) k: Spectral type from Walker (1983) l: Spectral type, B or V band photometry from Penston et al. (1975) or Penston (1973) m: Spectral type and V band photometry from Cohen & Kuhi (1979) n: Spectral type from Warren & Hesser (1977) o: Spectral type, B and V band photometry from Walker (1969) p: Spectral type from Parenago (1954) q: V and Ic band photometry from Prosser et al. (1994) r: V and Ic band photometry from Attridge & Herbst (1992) s: Position or spectral type, V and Ic band photometry from Herbig & Terndrup (1986) t: B and V band photometry from Duncan (1993) u: B and V band photometry from McNamara et al. (1989) v: B and V band photometry from van Altena et al. (1988) w: B, V, and Ic band photometry from Rydgren & Vrba (1984) x: B and V band photometry from Warren & Hesser (1977) y: Ic photographic magnitude from Jones & Walker (1988) z: Position, B and V photographic magnitudes from Andrews (1981) A: V photographic magnitude from Brun (1935) B: Position, B photographic or V photovisual magnitude from Parenago (1954) C: The bolometric luminosity of the late-type secondary cannot be determined D: Rotational period from Attridge & Herbst (1994) E: Rotational period from Attridge & Herbst (1992) F: Rotational period from Mandel & Herbst (1991) G: Rotational period from Walker (1990) H: Spectroscopic rotational velocity from Strom (1993) I: Spectroscopic rotational velocity from Duncan (1993) J: Spectroscopic rotational velocity from Abt et al. (1991) K: Spectroscopic rotational velocity from Walker (1990) L: Spectroscopic rotational velocity from Hartmann et al. (1986) M: One of two candidate optical counterparts. Upper limit corresponds to source flux N: Possible blend. Upper limit corresponds to half of source flux
Courtesy: Marc Gagne References: Abt et al. 1991 ApJ 367, 155 =1991ApJ...367..155A Andrews 1981 A Photometric atlas of the Orion Nebula (Belfadt: Armagh Obs. Press) Attridge & Herbst 1992 ApJ 398, L61 =1992ApJ...398L..61A Attridge & Herbst 1994, in prep. Brun 1935 Pub. Obs. Lyon, 1, No 12 =1935POLyo...1...12B Cohen & Kuhi 1979 ApJS 41, 743 =1979ApJS...41..743C Duncan 1993 ApJ 406, 172 =1993ApJ...406..172D Edwards et al. 1993 AJ 106, 372 =1993AJ....106..372E General Catalogue of Variable Stars =CDS Catalogue: II/139 Hartmann et al. 1986 ApJ 309, 275 =1986ApJ...309..275H Herbig & Terndrup 1986 ApJ 307, 609 =1986ApJ...307..609H Jones & Walker 1988 AJ 95, 1755 =1988AJ.....95.1755J Mandel & Herbst 1991 ApJ 383, L75 =1991ApJ...383L..75M McNamara & Huels 1983 A&AS 54, 221 =1983A&AS...54..221M McNamara et al. 1989 AJ 97, 1427 =1989AJ.....97.1427M Parenago 1954 =CDS Catalogue: II/171 Penston 1973, ApJ 183, 505 =1973ApJ...183..505P Penston et al. 1975, MNRAS 171, 219 =1975MNRAS.171..219P Prosser et al. 1994, ApJ 421, 517 =1994ApJ...421..517P Rydgren & Vrba 1984 AJ 89, 399 =1984AJ.....89..399R Strom 1993 private comm. van Altena et al. 1988 AJ 95, 1744 =1988AJ.....95.1744V Walker 1969 ApJ 155, 447 =1969ApJ...155..447W Walker 1983 ApJ 271, 642 =1983ApJ...271..642W Walker 1990 PASP 102, 726 =1990PASP..102..726W Warren & Hesser 1977 ApJS 34, 115 =CDS Catalogue: II/36
(End) Patricia Bauer [CDS] 19-Aug-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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