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J/A+A/359/113       X-ray and IR study of Rho Oph dark cloud    (Grosso+, 2000)

X-rays and regions of star formation: a combined ROSAT-HRI/near-to-mid IR study of the Rho Oph dark cloud Grosso N., Montmerle T., Bontemps S., Andre P., Feigelson E.D. <Astron. Astrophys. 359, 113 (2000)> =2000A&A...359..113G
ADC_Keywords: Molecular clouds ; X-ray sources ; Infrared sources Keywords: (Galaxy:) open clusters and associations: individual: rho Ophiuchi cluster - stars: pre-main sequence - stars: formation - X-rays: stars - infrared: stars Abstract: We have obtained two deep exposures of the ρ Oph cloud core region with the ROSAT High Resolution Imager. The improved position accuracy (1"-6") with respect to previous recent X-ray observations (ROSAT PSPC, and ASCA) allows us to remove positional ambiguities for the detected sources. We also cross-correlate the X-ray positions with IR sources found in the ISOCAM survey of the same region at 6.7 and 14.3µm, in addition to sources (optical and IR) known from ground-based observations, which are young stars (T Tauri stars, with and without circumstellar disks, and protostars). We thus obtain the best-studied sample of X-ray emitting stars in a star-forming region (63 X-ray sources detected, and 55 identified). Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 16 28 06.0 -24 32 30 Rho Oph dark cloud ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 102 63 HRI X-ray sources tableb1.dat 102 63 HRI X-ray sources counterpart identifications in the ρ Oph cloud cores A & F notes.dat 80 66 Individual notes tableb1.tex 282 188 LaTeX version of table 1
See also: IX/28 : ROSAT HRI Pointed Observations (1RXH) (ROSAT Team, 1999) Table 1: Log of ROSAT HRI Observations: -------------------------------------------------------------------------------- Begin End Pointing Core Obs Date Hour Date Hour Time Exposure ID ks ks -------------------------------------------------------------------------------- 201835h A 1 1995 Aug 29 18h31m30s 1995 Sep 12 22h35m47s 1224.3 51.3 201834h F 1 1995 Mar 09 00h51m03s 1995 Mar 14 05h16m43s 447.9 12.5 201834h-1 F 2 1995 Aug 18 19h29m21s 1995 Aug 20 14h52m05s 27.8 27.5 201834h-2 F 3 1996 Sep 07 23h12m46s 1996 Sep 11 13h46m23s 331.6 37.2 F 1+2+3 1995 Mar 09 00h51m03s 1996 Sep 11 13h46m23s 47739.3 77.2 Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 3 A3 --- ROXR ROXR designation 6- 7 I2 h RAh Right ascension (J2000) (1) 9- 10 I2 min RAm Right ascension (J2000) (1) 12- 15 F4.1 s RAs Right ascension (J2000) (1) 17 A1 --- DE- Declination sign (J2000) (1) 18- 19 I2 deg DEd Declination (J2000) (1) 21- 22 I2 arcmin DEm Declination (J2000) (1) 24- 25 I2 arcsec DEs Declination (J2000) (1) 28- 29 I2 h RA1950h Right ascension (B1950) (1) 31- 32 I2 min RA1950m Right ascension (B1950) (1) 34- 37 F4.1 s RA1950s Right ascension (B1950) (1) 39 A1 --- DE1950- Declination sign (B1950) (1) 40- 41 I2 deg DE1950d Declination (B1950) (1) 43- 44 I2 arcmin DE1950m Declination (B1950) (1) 46- 47 I2 arcsec DE1950s Declination (B1950) (1) 50 I1 arcsec e_Pos rms uncertainty on Position (1) 52- 57 F6.1 --- LH Likelihood of existence value (1) 59- 60 A2 --- l_ct1 [≤ ] Limit flag on ct1 61- 64 F4.1 ct/ks ct1 ? Count rate of observation 1 67- 69 F3.1 ct/ks e_ct1 ? rms uncertainty on ct1 71- 72 A2 --- l_ct2 [≤ ] Limit flag on ct2 73- 76 F4.1 ct/ks ct2 ? Count rate of observation 2 78- 80 F3.1 ct/ks e_ct2 ? rms uncertainty on ct2 82- 83 A2 --- l_ct3 [≤ ] Limit flag on ct3 84- 87 F4.1 ct/ks ct3 ? Count rate of observation 3 89- 91 F3.1 ct/ks e_ct3 ? rms uncertainty on ct3 93- 94 A2 --- l_ct1+2+3 [≤ ] Limit flag on ct 95- 98 F4.1 ct/ks ct1+2+3 ? Count rate of observation (1+2+3) 100-102 F3.1 ct/ks e_ct1+2+3 ? rms uncertainty on ct
Note (1): For the core F field, the indicated positions and the LH values correspond to observation (1, 2 or 3) where LH and the position accuracy are the best, i.e. when the count rate is highest.
Byte-by-byte Description of file: tableb1.dat
Bytes Format Units Label Explanations
1- 3 A3 --- ROXR X-ray source number in this article (ANN or FNN) 5- 6 I2 --- ROXR1 ? Casanova et al. (1995ApJ...439..752C) X-ray source number (ROXR1) 7 A1 --- n_ROXR1 [* ou] Note (1) 9- 10 I2 --- ROXR2 ? Casanova (1994, Ph.D. thesis, Paris VI University) X-ray source number (ROXR2) 11- 12 A2 --- n_ROXR2 [* ou] Note (1) 14- 15 A2 --- ASCA Kamata et al. (1997PASJ...49..461K) X-ray source number 16 A1 --- n_ASCA [ou] Note (1) 18- 37 A20 --- Name Counterpart name 38 A1 --- n_Name [* ou] Note (1) 40- 43 A4 --- ISO IR excess from Bontemps et al. (2000, A&A, submitted) (2) 44- 45 A2 --- n_ISO [* ou] Note (1) 47- 53 A7 --- ClassIR IR class (3) 54 A1 --- n_ClassIR [*] Note in notes.dat file 56- 59 F4.1 mag AV ? Visual extinction 60 A1 --- n_AV [*] Note in notes.dat file 62- 68 F7.2 solLum Lum ? Stellar luminosity 69 A1 --- n_Lum [*] Note in notes.dat file 71- 72 A2 --- l_logLx1 [≤ ] Limit flag on logLx1 73- 76 F4.1 [10-7W] logLx1 ? X-ray luminosity for d=140pc (obs. 1) 77 A1 --- u_logLx1 [?] Uncertainty flag on logLx1 79- 80 A2 --- l_logLx2 [≤ ] Limit flag on logLx2 81- 84 F4.1 [10-7W] logLx2 ? X-ray luminosity for d=140pc (obs. 2) 85 A1 --- u_logLx2 [?] Uncertainty flag on logLx2 87- 88 A2 --- l_logLx3 [≤ ] Limit flag on logLx3 89- 92 F4.1 [10-7W] logLx3 ? X-ray luminosity for d=140pc (obs. 3) 93 A1 --- u_logLx3 [?] Uncertainty flag on logLx3 95- 96 A2 --- l_logLxtot [≤ ] Limit flag on logLxtot 98-101 F4.1 [10-7W] logLxtot ? X-ray luminosity for d=140pc (obs. 1+2+3) 102 A1 --- u_logLxtot [?] Uncertainty flag on logLxtot
Note (1): o = out of observation field u = unobserved source * = note in notes.dat file Note (2): red = ISOCAM source with IR excess blue = ISOCAM source without IR excess Note (3): IR Class: nII = new class II nIII = new class III ? = X-ray detected source for which intrinsic X-ray luminosity cannot be determined II-III? = class II or class III candidate
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [ROXR] 5- 7 A3 --- ROXR ROXR number 9- 80 A72 --- Note Text of the note (1)
Note (1): Acronyms used in the text: B = Barsony et al. (1997, Cat. J/ApJS/112/109) BBRCG = Barsony et al. (1989ApJ...346L..93B) DoAr = Dolidze and Arakelyan (1959AZh....36..444D) El = Elias (1978ApJ...224..453E) GSS = Grasdalen et al. (1973ApJ...184L..53G) GY = Greene and Young (1992ApJ...395..516G) HD = The Henry Draper catalogue (Draper, 1918, Cat. III/135) IRS = Wilking et al. (1989ApJ...340..823W) ROXC = Montmerle et al. (1983ApJ...269..182M) ROXs = Bouvier and Appenzeller (1992A&AS...92..481B) S = abbreviation for ``Source'' in Grasdalen et al. (1973ApJ...184L..53G) SKS = Table 1 of Strom et al. (1995, Cat. J/ApJ/438/813) SR = Struve and Rudkjoebing (1949ApJ...109...92S) U = The PMM USNO-A1.0 Catalogue (Monet et al., 1996, Cat. I/243) VSS = Vrba et al. (1976AJ.....81..958V) VSSG = Vrba et al. (1975ApJ...197...77V) WL = Wilking and Lada (1983ApJ...274..698W) WSB = Wilking et al. (1987AJ.....94..106W) YLW = Young et al. (1989ApJ...340..823W)
Acknowledgements: Nicolas Grosso History: * 12-May-2000: first archived * 09-Dec-2000: table A1 added, and ROXR name homogenized in the notes.
(End) Patricia Bauer [CDS] 12-May-2000
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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