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J/A+A/429/963    XMM-Newton observation of the rho Oph cloud      (Ozawa+, 2005)

The X-ray emission from Young Stellar Objects in the rho Ophiuchi cloud core as seen by XMM-Newton. Ozawa H., Grosso N., Montmerle T. <Astron. Astrophys. 429, 963 (2005)> =2005A&A...429..963O
ADC_Keywords: Clusters, open ; Stars, pre-main sequence ; X-ray sources Keywords: Galaxy: open clusters and associations: individual: rho Ophiuchi cloud stars: pre-main sequence - stars: low-mass, brown dwarfs - X-rays: stars - infrared: stars Abstract: We observed the main core F of the rho Ophiuchi cloud, an active star-forming region located at d∼140pc, using XMM-Newton with an exposure of 33ks on February 19, 2001. We detect 87 X-ray sources within the 30' diameter field-of-view of the EPIC imaging detector array with significance above 4.4 sigma. We cross-correlate the positions of XMM-Newton X-ray sources with previous X-ray, infrared (IR), and optical catalogs. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 95 87 The list of the X-ray sources detected by XMM-Newton table2.dat 108 87 Identification of the XMM-Newton sources with known X-ray sources and optical/infrared sources
See also: J/A+A/359/113 : X-ray and IR study of rho Oph dark cloud (Grosso+, 2000) J/A+A/372/173 : ISOCAM observations of rho Ophiuchi cloud (Bontemps+, 2001) J/ApJ/438/813 : Stellar population in rho Oph cloud core (Strom+, 1995) 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- 2 I2 --- ROXN XMM-Newton source ID number, ROXN- (1) 4- 5 I2 h RAh Right ascension (J2000.0) 7- 8 I2 min RAm Right ascension (J2000.0) 10- 13 F4.1 s RAs Right ascension (J2000.0) 15 A1 --- DE- Declination sign (J2000.0) 16- 17 I2 deg DEd Declination (J2000.0) 19- 20 I2 arcmin DEm Declination (J2000.0) 22- 25 F4.1 arcsec DEs Declination (J2000.0) 27- 29 F3.1 arcsec e_Pos Position error 31- 35 F5.1 ct/ks CRM1 ? Count rate for MOS1 (2) 37- 40 F4.1 ct/ks e_CRM1 ? Error of count rate for MOS1 (2) 42- 46 F5.2 --- HRM1 ? Hardness ratio for MOS1 (2) 48- 51 F4.2 --- e_HRM1 ? Hardness ratio error for MOS1 (2) 53- 57 F5.1 ct/ks CRM2 ? Count rate for MOS2 (2) 59- 62 F4.1 ct/ks e_CRM2 ? Error of count rate for MOS2 (2) 64- 68 F5.2 --- HRM2 ? Hardness ratio for MOS2 (2) (3) 70- 73 F4.2 --- e_HRM2 ? Hardness ratio error for MOS2 (2) (3) 75- 79 F5.1 ct/ks CRPN ? Count rate for PN (2) 81- 84 F4.1 ct/ks e_CRPN ? Error of count rate for PN (2) 86- 90 F5.2 --- HRPN ? Hardness ratio for PN (2) (3) 92- 95 F4.2 --- e_HRPN ? Hardness ratio error for PN (2) (3)
Note (1): ROXN-n for "Rho Oph X-ray sources, Newton n" Note (2): The blancs indicate that the X-ray sources are outside the field of view of the instrument. Note (3): The hardness ratio is calculated by the equation: HR=(H-S)/(H+S), where S and H are counts in the 0.3-2.0keV band and in the 2.0-8.0keV band, respectively. Note that due to pile-up, HR is maybe not reliable for source 1.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 2 I2 --- ROXN XMM-Newton source ID number, ROXN- (1) 3 A1 --- NEW Flag of New X-ray source (2) 5- 7 A3 --- ROX Einstein number (Montmerle et al., 1983ApJ...269..182M) (3) (4) 9- 11 A3 --- ROXR1 ROSAT PSPC number (Casanova et al., 1995ApJ...439..752C) (3) 14- 15 I2 --- ROXR2 ? ROSAT PSPC number (Casanova et al., 1994PhDT.......268C) (3) 17- 19 A3 --- ROXA ASCA number (Kamata et al., 1997PASJ...49..461K) (3) 21 A1 --- --- [F] 22- 23 I2 --- ROXRF ? ROSAT HRI number (Grosso et al., 2000, Cat. J/A+A/359/111) (3) 26- 27 I2 --- [IKT2001] ? Chandra number (Imanishi et al., 2001ApJ...557..747I) (3) 29- 31 I3 --- ISO-Oph ? ISO ISOCAM number (Bontemps et al., 2001, Cat. J/A+A/371/173) (3) 33- 48 A16 --- 2MASSJ 2MASS number (Cat. II/246, HHMMSSss+DDMMSSs) 50 A1 --- l_Jmag Limit flag for J band 51- 55 F5.2 mag Jmag ? J band magnitude 57 A1 --- l_Hmag Limit flag for H band 58- 62 F5.2 mag Hmag ? H band magnitude 64- 68 F5.2 mag Ksmag ? Ks band magnitude 70 A1 --- l_J-H Limit flag for J-H 71- 74 F4.2 mag J-H ? J-H magnitude 76 A1 --- l_H-Ks Limit flag for H-Ks 77- 80 F4.2 mag H-Ks ? H-Ks magnitude 82- 98 A17 --- Name Name of the known sources (5) 100 A1 --- FS [f] f: foreground stars (6) 102-105 A4 --- Class Classification of the YSO (6) 107-108 A2 --- BD [bd ] Brown dwarfs (7)
Note (1): ROXN-n for "Rho Oph X-ray sources, Newton n". Note (2): The asterisks indicate new X-ray sources found in this observation. Note (3): The identification with source catalogs. Blanks indicate that the XMM-Newton sources have no known counterpart. The hyphens indicate that the XMM-Newton sources are outside the field of view of the instruments. Note (4): Grosso (2001A&A...370L..22G) shows that one of these Einstein observation has detected an X-ray source associated with the YLW16 (ROXN-46) IR source group. Note (5): For the source naming convention, see Andre & Montmerle (1994ApJ...420..837A) and references therein. - The source names beginning with BKLT are from Barsony et al. (1997, Cat. J/ApJS/112/109). - 0600-2053 is from the catalog USNO-A1.0 (Monet et al., 1996, Cat. I/243, See USNO-A2.0, Cat. I/252). Note (6): The classifications of Class I, II, and III are from Bontemps et al. (2001, Cat. J/A+A/371/173), Andre & Montmerle (1994ApJ...420..837A) or Martin et al. (1998MNRAS.300..733M). The Class III candidates proposed in this paper are indicated by "nIII". Note (7): The bona fide brown dwarfs are indicated by "bd".
Acknowledgements: Hideki Ozawa, Hideki.Ozawa(at)obs.ujf-grenoble.fr
(End) Hideki Ozawa [LAOG, France], Patricia Vannier [CDS] 04-Jan-2005
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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