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J/MNRAS/400/299 Chandra deep protocluster survey (Lehmer+, 2009)
The Chandra deep protocluster survey: point-source catalogues for a 400-ks observation of the z=3.09 protocluster in SSA22. Lehmer B.D., Alexander D.M., Chapman S.C., Smail I., Bauer F.E., Brandt W.N., Geach J.E., Matsuda Y., Mullaney J.R., Swinbank A.M. <Mon. Not. R. Astron. Soc., 400, 299-316 (2009)> =2009MNRAS.400..299L
ADC_Keywords: Surveys ; X-ray sources ; Photometry, UBVRI ; Photometry, millimetric/submm ; Redshifts Keywords: surveys - galaxies: active - galaxies: clusters: general - cosmology: observations - early Universe - X-rays: genera Abstract: We present X-ray point-source catalogues for a deep ∼400ks Chandra ACIS-I (Advanced CCD Imaging Spectrometer) exposure of the SSA22 field. The observations are centred on a z=3.09 protocluster, which is populated by Lyman break galaxies (LBGs), Lyα emitters (LAEs) and extended Lyα-emitting blobs (LABs). The survey reaches ultimate (3 count) sensitivity limits of ∼5.7x10-17 and ∼3.0x10-16erg/cm2/s for the 0.5-2 and 2-8keV bands, respectively (corresponding to L2-10keV∼5.7x1042erg/s and L10-30keV∼2.0x1043erg/s at z=3.09, respectively, for an assumed photon index of {GAMMA}=1.4). These limits make SSA22 the fourth deepest extragalactic Chandra survey yet conducted, and the only one focused on a known high-redshift structure. In total, we detect 297 X-ray point sources and identify one obvious bright extended X-ray source over a ∼330arcmin2 region. In addition to our X-ray catalogues, we provide all available optical spectroscopic redshifts and near-infrared and mid-infrared photometry available for our sources. Description: The entire ∼400ks Chandra exposure consisted of four separate Chandra observations of ∼70-120ks taken between 2007 October 1 and 2007 December 30. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 363 297 Main source catalog tablea1.dat 363 9 Supplementary catalog of additional WAVDETECT sources with false-positive probability≤10-6 that are not in the main Chandra catalogue
See also: J/ApJ/592/728 : Lyman break galaxies at redshift z∼3 (Steidel+, 2003) Byte-by-byte Description of file: table2.dat tablea1.dat
Bytes Format Units Label Explanations
3- 5 I3 --- Seq Source sequential number (1) 9- 10 I2 h RAh Right ascension (J2000) 12- 13 I2 min RAm Right ascension (J2000) 15- 19 F5.2 s RAs Right ascension (J2000) 22 A1 --- DE- Declination sign (J2000) 23- 24 I2 deg DEd Declination (J2000) 26- 27 I2 arcmin DEm Declination (J2000) 29- 32 F4.1 arcsec DEs Declination (J2000) 35- 39 F5.3 --- AE Acis Extract detection probability (1-P) 43- 44 I2 [-] logPr Logarithm of the minimum WAVDETECT probability in which each source is detected 48- 51 F4.2 arcsec ePos Positional error 54- 58 F5.2 arcmin theta Off-axis angle 61- 67 F7.2 ct NCF Full-band (0.5-8keV) counts 71- 75 F5.2 ct E_NCF ?=-1.00 Full-band counts upper error (-1.00 indicates an upper limit) 79- 83 F5.2 ct e_NCF ?=-1.00 Full-band counts lower error (-1.00 indicates an upper limit) 85- 91 F7.2 ct NCS Soft-band (0.5-2keV) counts 95- 99 F5.2 ct E_NCS ?=-1.00 Soft-band counts upper error (-1.00 indicates an upper limit) 103-107 F5.2 ct e_NCS ?=-1.00 Soft-band counts lower error (-1.00 indicates an upper limit) 110-115 F6.2 ct NCH Hard-band counts (2-8keV) 119-123 F5.2 ct E_NCH ?=-1.00 Hard-band counts upper error (-1.00 indicates an upper limit) 127-131 F5.2 ct e_NCH ?=-1.00 Hard-band counts lower error (-1.00 indicates an upper limit) 135-136 I2 h RAi.h ?=- Right ascension in K-band (UKIDSS DXS) 138-139 I2 min RAi.m ?=- Right ascension in K-band (UKIDSS DXS) 141-145 F5.2 s RAi.s ?=- Right ascension in K-band (UKIDSS DXS) 148 A1 --- DEi.- ?=- Declination sign in K-band (UKIDSS DXS) 149-150 I2 deg DEi.d ?=- Declination in K-band (UKIDSS DXS) 152-153 I2 arcmin DEi.m ?=- Declination in K-band (UKIDSS DXS) 155-158 F4.1 arcsec DEi.s ?=- Declination in K-band (UKIDSS DXS) 162-166 F5.2 arcsec DK-X ?=-1.00 Offset between K-band and X-ray positions (K-X) 169-173 F5.2 mag Kmag ?=-1.00 K-band magnitude (Vega) 176-180 F5.2 mag Bmag ?=-1.00 Subaru B-band magnitude (AB) 183-187 F5.2 mag Vmag ?=-1.00 Subaru V-band magnitude (AB) 190-194 F5.2 mag Rmag ?=-1.00 Subaru R-band magnitude (AB) 197-201 F5.2 mag imag ?=-1.00 Subaru i-band magnitude (AB) 204-208 F5.2 mag zmag ?=-1.00 Subaru z-band magnitude (AB) 211-215 F5.2 mag [3.6] ?=-1.00 Spitzer IRAC 3.6um AB magnitude (2) 216 A1 --- n_[3.6] [*] * when Chandra exposure has no overlapping IRAC observations 218-222 F5.2 mag [4.5] ?=-1.00 Spitzer IRAC 4.5um AB magnitude (2) 223 A1 --- n_[4.5] [*] * when Chandra exposure has no overlapping IRAC observations 225-229 F5.2 mag [5.8] ?=-1.00 Spitzer IRAC 5.8um AB magnitude (2) 230 A1 --- n_[5.8] [*] * when Chandra exposure has no overlapping IRAC observations 232-236 F5.2 mag [8.0] ?=-1.00 Spitzer IRAC 8.0um AB magnitude (2) 237 A1 --- n_[8.0] [*] * when Chandra exposure has no overlapping IRAC observations 239-243 F5.2 --- z ?=-1.00 Best available optical spectroscopic redshift 246-247 I2 --- r_z ?=-1 Spectroscopic survey used to determine redshift (3) 250-255 I6 ks TExpF Full-Band effective exposure time (ks) 257-262 I6 ks TExpS Soft-Band effective exposure time (ks) 264-269 I6 ks TExpH Hard-Band effective exposure time (ks) 272-276 F5.2 --- HB/SB ?=-1.00 Band hard/soft ratio: note that some are upper or lower limits 280-284 F5.2 --- E_HB/SB ?=-1.00 Band ratio upper error 288-292 F5.2 --- e_HB/SB ?=-1.00 Band ratio lower error 296-300 F5.2 --- Gamma Photon index Γ: note that some are upper or lower limits 304 A1 --- lEGamma [-] - indicates an upper limit 305-308 F4.2 --- E_Gamma Photon index upper value: set to value of photon index if upper or lower limit 312 A1 --- leGamma [-] - indicates an upper limit 313-316 F4.2 --- e_Gamma Photon index lower value: set to value of photon index if upper or lower limit 319 A1 --- l_FluxF [-] Limit flag on FluxF (- indicates upper limit) 320-327 E8.3 mW/m2 FluxF Full-band flux (0.5-8keV) 330 A1 --- l_FluxS [-] Limit flag on FluxS (- indicates upper limit) 331-338 E8.3 mW/m2 FluxS Soft-band flux (0.5-2keV) 341 A1 --- l_FluxH [-] Limit flag on FluxH (- indicates upper limit) 342-349 E8.3 mW/m2 FluxH Hard-band flux (2-8keV) 352-363 A12 --- Notes Notes (4)
Note (1): Sources identified in Simbad as <[LAC2009] NNN> for table2, <[LAC2009] SN> for tablea1. Note (2): When a counterpart is not identified for a given IRAC band, a value of "-1.000" is listed for that band. We note that a small area of the Chandra exposure has no overlapping IRAC observations (see Fig.2), and sources in these regions have a value of "-1.00" followed by "*". Note (3): Reference as follows: 1 = Garilli et al. (2008A&A...486..683G) 2 = Steidel et al. (2003, Cat. J/ApJ/592/728) 3 = Matsuda et al. (2005ApJ...634L.125M) 4 = Chapman et al. (2009; in-preparation) Note (4): Notes as follows: O = refers to objects that have large cross-band (i.e. between the three standard bands) positional offsets (>2"); all of these sources lie at off-axis angles >5.5' S = refers to close-double or close-triple sources where manual separation was required (see discussion in Section 3.2.1) D = refers to a source having an obvious diffraction spike in the K-b and image, suggesting the source is likely a Galactic star LBG = indicate sources included in the Steidel et al. (2003, J/ApJ/592/728) LBG survey LAE = indicate sources included in the Hayashino et al. (2004AJ....128.2073H) LAE survey LAB = indicates that the source was coincident with a LAB in the Geach et al. (2009ApJ...700....1G) study
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Sep-2010
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