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J/ApJ/582/615       SHEEP survey                             (Nandra+, 2003)

SHEEP: the search for the high-energy extragalactic population. Nandra K., Georgantopoulos I., Ptak A., Turner T.J. <Astrophys. J. 582, 615 (2003)> =2003ApJ...582..615N
ADC_Keywords: X-ray sources ; Keywords: galaxies: active - galaxies: nuclei - surveys - X-rays: galaxies Abstract: We present the SHEEP survey for serendipitously detected hard X-ray sources in ASCA GIS images. In a survey area of ∼40deg2, 69 sources were detected in the 5-10keV band to a limiting flux of ∼10-13ergs/cm2/s. The number counts agree with those obtained by the similar BeppoSAX High-Energy Large Area Survey (HELLAS), and both are in close agreement with ASCA and BeppoSAX 2-10keV surveys. Spectral analysis of the SHEEP sample reveals that the 2-10 and 5-10keV surveys do not sample the same populations, however, as we find considerably harder spectra, with an average Γ∼1.0, assuming no absorption. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 105 69 The SHEEP Sample table2.dat 87 56 ROSAT Observations of SHEEP Sources table3.dat 81 19 Catalog and Literature Identifications table5.dat 86 8 Spectral Fits to Sources with S/N > 10
See also: J/MNRAS/327/771 : BeppoSAX HELLAS survey. II. (Fiore+, 2001) J/A+A/370/900 : BeppoSAX HELLAS survey. IV (Vignali+, 2001) J/ApJ/570/100 : BeppoSAX HELLAS survey. V. (La Franca+, 2002) J/ApJ/518/656 : ASCA Large Sky Survey (Ueda+, 1999) J/ApJS/133/1 : GIS catalog project : source catalog (Ueda+, 2001) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 12 A12 --- SHEEP SHEEP designation(JHHMM.m+DDMM) 14- 15 I2 h RAh ASCA Right ascension (J2000) 17- 18 I2 min RAm ASCA Right ascension (J2000) 20- 23 F4.1 s RAs ASCA Right ascension (J2000) 25 A1 --- DE- ASCA Declination sign (J2000) 26- 27 I2 deg DEd ASCA Declination (J2000) 29- 30 I2 arcmin DEm ASCA Declination (J2000) 32- 33 I2 arcsec DEs ASCA Declination (J2000) 35- 38 F4.1 --- S/N Signal-to-noise ratio (equivalent sigma) 40- 43 F4.1 10-4ct/s Raw Total GIS2+GIS3 counts in the 5-10keV band divided by total exposure (GIS2+GIS3) 45- 47 F3.1 10-4ct/s e_Raw rms uncertainty on Raw 49- 53 F5.1 10-4ct/s Rate Hard-band (5-10keV) count rate corrected to on-axis value for a single GIS detector 55- 58 F4.1 10-4ct/s e_Rate rms uncertainty on Rate 60- 64 F5.2 --- HM Medium hardness ratio (HM=H-M/H+M) (1) 66- 69 F4.2 --- E_HM Error on HM (Upper limit) 71- 74 F4.2 --- e_HM Error on HM (Lower limit) 76- 80 F5.2 --- HS Soft hardness ratio (HS=H-S/H+S) (1) 82- 85 F4.2 --- E_HS Error on HS (Upper limit) 87- 90 F4.2 --- e_HS Error on HS (Lower limit) 92- 99 I8 --- Seq Sequence number in which this source was detected 101-105 F5.1 ks ExpTime Total GIS+GIS3 exposure time for sequence
Note (1): Hardness ratios: HM = H-M/H+M and HS = H-S/H+S, where M is the medium energy (2-5kev) band S is the soft (0.7-2keV) band H is the hard (5-10keV) band
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 12 A12 --- SHEEP SHEEP designation 14- 24 A11 --- Seq ROSAT sequence or catalog 26- 30 F5.2 ks ExpTime ROSAT exposure time 32- 35 F4.1 arcmin theta ? Off-axis angle 37- 52 A16 --- RXJ ROSAT designation 54- 57 F4.2 arcmin Offset ? Offset from ACSA position 59 A1 --- l_Rate Limit flag on Rate 60- 66 F7.5 ct/s Rate PSPC or HRI count rate in the 0.1-2keV band 68- 74 F7.5 ct/s e_Rate ? rms uncertainty on Rate 76- 79 F4.1 10+21cm-2 NH Galactic hydrogen column density 81 A1 --- l_Flux Limit flag on Flux 82- 87 F6.2 10-16W/m2 Flux Flux in the 0.1-2keV band
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 12 A12 --- SHEEP SHEEP designation 14- 34 A21 --- Name Other name from NED 36- 37 I2 h RAh NED Right ascension (J2000) 39- 40 I2 min RAm NED Right ascension (J2000) 42- 45 F4.1 s RAs NED Right ascension (J2000) 47 A1 --- DE- NED Declination sign (J2000) 48- 49 I2 deg DEd NED Declination (J2000) 51- 52 I2 arcmin DEm NED Declination (J2000) 54- 55 I2 arcsec DEs NED Declination (J2000) 57- 64 A8 --- Class Classification (1) 66- 70 F5.3 --- z ? Redshfit 72- 74 F3.1 arcmin Offset Offset from ROSAT position 76 A1 --- Radio [YN] Known radio source ? 78 A1 --- IR [YN] Known infrared source ? 80- 81 I2 --- Ref Reference code (2)
Note (1): Classification: Cl = cluster G = galaxy QSO = quasi-stellar object Sy = Seyfert galaxy Note (2): References: (1) Maddox et al., 1990MNRAS.243..692M (2) Foltz et al., 1993AJ....105...22F (3) Veron-Cetty & Veron, 1996, Cat. J/A+AS/115/97 (4) Wisotzki et al., 2000, Cat. J/A+A/358/77 (5) Newberg et al., 1999, Cat. J/ApJS/123/377 (6) Cutri et al. 2000 (2MASS second incremental release); (7) Fiore et al., 1999MNRAS.306L..55F (8) Young & Curie, 1998, Cat. J/A+AS/127/367 (9) Becker et al., 1995ApJ...450..559B (10) Mason et al., 2000, Cat. J/MNRAS/311/456 (11) Zwicky & Herzog, 1963, Cat. VII/49 (12) Takase & Miyauchi-Isobe, 1985, Cat. VII/150 (13) Boyle, Wiles, & Elvis, 1997MNRAS.285..511B (14) Falco et al., 1999, Cat. J/PASP/111/438 (15) Johnston et al., 1995, Cat. J/AJ/110/880
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 12 A12 --- SHEEP SHEEP designation 15- 17 F3.1 10+21cm-2 NH Galactic hydrogen column density 19- 21 F3.1 10+21cm-2 E_NH Error on NH (Upper limit) 23- 25 F3.1 10+21cm-2 e_NH Error on NH (Lower limit) 28- 31 F4.2 ---- Sp-Index Spectral index Sp-Index 33- 36 F4.2 ---- E_Sp-Index Error on Sp-Index (Upper limit) 38- 41 F4.2 --- e_Sp-Index Error on Sp-Index (Lower limit) 44- 47 F4.2 10-15W/m2 FX(2-10) Flux in the 2-10keV band 50- 53 F4.2 10-15W/m2 FX(5-10) Flux in the 5-10keV band 56- 60 F5.1 --- Chi2 Chi2 value 61 A1 --- --- [/] 62- 64 I3 --- DOF Degrees of freedom 66- 86 A21 ---- Name Other name
History: From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 26-Mar-2003
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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