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IX/49               XXL Survey: First results                   (Pierre+, 2016)

The XXL Survey: First results. Pierre M., Pacaud F., Adami C., Alis S., Altieri B., Baran B., Benoist C., Birkinshaw M., Bongiorno A., Bremer M.N., Brusa M., Butler A., Ciliegi P., Chiappetti L., Clerc N., Corasaniti P.S., Coupon J., De Breuck C., Democles J., Desai S., Delhaize J., Devriendt J., Dubois Y., Eckert D., Elyiv A., Ettori S., Evrard A., Faccioli L., Farahi A., Ferrari C., Finet F., Fotopoulou S., Fourmanoit N., Gandhi P., Gastaldello F., Gastaud R., Georgantopoulos I., P.Giles, Guennou L., Guglielmo V., Horellou C., Husband K., Huynh M., Iovino A., Kilbinger M., Koulouridis E., Lavoie S., Le Brun A.M.C., LeFevre J.P., Lidman C., Lieu M., Lin C.A., Mantz A., Maughan B.J., Maurogordato S., McCarthy I.G., McGee S., Melin J.B., Melnyk O., Menanteau F., Novak M., Paltani S., Plionis M., Poggianti B.M., Pomarede D., Pompei E., Ponman T.J., Ramos-Ceja M.E., Ranalli P., Rapetti D., Raychaudury S., Reiprich T.H., Rottgering H., Rozo E., Ryko E., Sadibekova T., Santos J., Sauvageot J.L., Schimd C., Sereno M., Smith G.P., Smolcic V., Snowden S., Spergel D., Stanford S., Surdej J., Valageas P., Valotti A., Valtchanov I., Vignali C., Willis J., Ziparo F. <Astron. Astrophys. 592, A1-A12 (2016)> =2016yCat.9049....0P =2016A&A...592A...1P +2016A&A...592A...2P +2016A&A...592A...3G +2016A&A...592A...4L +2016A&A...592A...5F +2016A&A...592A...6P +2016A&A...592A...7A +2016A&A...592A...8B +2016A&A...592A...9Z +2016A&A...592A..10S +2016A&A...592A..11K +2016A&A...592A..12E +2016PASA...33....1L +2016MNRAS.462.4141L
ADC_Keywords: Surveys ; X-ray sources ; Space observations ; Observatory log ; Clusters, galaxy ; Radio sources ; QSOs ; Redshifts Keywords: surveys - X-rays: general - X-rays: galaxies: clusters - X-rays: diffuse background - large-scale structure of Universe - cosmological parameters - galaxies: active - photometry - galaxies: groups: general - radio continuum: galaxies - radio continuum: general - radiation mechanisms: general - galaxies: quasars: general Abstract: The quest for the cosmological parameters that describe our universe continues to motivate the scientific community to undertake very large survey initiatives across the electromagnetic spectrum. Over the past two decades, the Chandra and XMM-Newton observatories have sup- ported numerous studies of X-ray-selected clusters of galaxies, active galactic nuclei (AGNs), and the X-ray background. The present paper is the first in a series reporting results of the XXL-XMM survey; it comes at a time when the Planck mission results are being finalised. We present the XXL Survey, the largest XMM programme totaling some 6.9Ms to date and involving an international consortium of roughly 100 members. The XXL Survey covers two extragalactic areas of 25deg2 each at a point-source sensitivity of ∼5x10-15erg/s/cm2 in the [0.5-2]keV band (completeness limit). The survey's main goals are to provide constraints on the dark energy equation of state from the space-time distribution of clusters of galaxies and to serve as a pathfinder for future, wide-area X-ray missions. We review science objectives, including cluster studies, AGN evolution, and large-scale structure, that are being conducted with the support of approximately 30 follow-up programmes. List of XXL papers: I. Scientific motivations - XMM-Newton observing plan - Follow-up observations and simulation programme. II. The bright cluster sample: catalogue and luminosity function. III. Luminosity-temperature relation of the bright cluster sample. IV. Mass-temperature relation of the bright cluster sample. VI. The 1000 brightest X-ray point sources. VII. A supercluster of galaxies at z = 0.43. VIII. MUSE characterisation of intracluster light in a z∼0.53 cluster of galaxies. IX. Optical overdensity and radio continuum analysis of a supercluster at z=0.43. X. K-band luminosity - weak-lensing mass relation for groups and clusters of galaxies. XI. ATCA 2.1 GHz continuum observations. XII. Optical spectroscopy of X-ray-selected clusters and the frequency of AGN in superclusters. XIII. Baryon content of the bright cluster sample. XIV. AAOmega redshifts for the southern XXL field. Description: Paper I. Scientific motivations - XMM-Newton observing plan. Follow-up observations and simulation programme. The table xxlpoint.dat is a list of all XMM survey-type observations (≤AO-10) in the XXL fields, providing the match between the internal naming and the ESA XXM log,the coordinates and useful exposure times of the XMM pointings, their quality and ancillary information. Paper II. The bright cluster sample: catalogue and luminosity function. Paper III. Luminosity-temperature relation of the bright cluster sample. Paper IV. Mass-temperature relation of the bright cluster sample. This article presents the XXL bright cluster sample, a subsample of 100 galaxy clusters selected from the full XXL catalogue by setting a lower limit of 3*10-14erg/cm2/s on the source flux within a 1' aperture. The selection function was estimated using a mixture of Monte Carlo simulations and analytical recipes that closely reproduce the source selection process. An extensive spectroscopic follow-up provided redshifts for 97 of the 100 clusters. We derived accurate X-ray parameters for all the sources. Scaling relations were self-consistently derived from the same sample in other publications of the series. On this basis, we study the number density, luminosity function, and spatial distribution of the sample. The bright cluster sample consists of systems with masses between M500=7*10+14 and 3*10+14M, mostly located between z=0.1 and 0.5. The observed sky density of clusters is slightly below the predictions from the WMAP9 model, and significantly below the prediction from the Planck 2015 cosmology. In general, within the current uncertainties of the cluster mass calibration, models with higher values of σ8 and/or ΩM appear more difficult to accommodate. We provide tight constraints on the cluster differential luminosity function and find no hint of evolution out to z∼1. We also find strong evidence for the presence of large-scale structures in the XXL bright cluster sample and identify five new superclusters. We provide the XXL-100-GC catalogue (xxl100gc.dat), the master catalogue of the 100 brightest galaxy clusters from the XXL Survey. This catalogue summarizes all the information published on this sample by the XXL collaboration, which were initially distributed over several articles. It contains the sources positions, redshifts, fluxes and mass estimates published in Appendix D of paper II, combined with luminosities and temperatures from Table 1 of paper III, as well as gas masses from Table A.1 of paper XIII. Paper VI. The 1000 brightest X-ray point sources. We provide the XXL1000AGN catalogue (xxl1000a.dat), the first catalogue release of the XXL point source catalog, detected in the 2-10keV energy band. The catalogue contains the 1000 brightest sources, at the flux limit of F[2-10 keV]=4.8 10-14erg/s/cm2. We provide derived X-ray spectral parameters, and counterpart properties including four optical magnitudes, photometric and spectroscopic redshift estimates. We also provide the best photometric redshift class based on machine learning classification and the probability for a source to be a star or a photometric redshift outlier. Paper IX. Optical overdensity and radio continuum analysis of a supercluster at z=0.43. The table xxl_vla.dat contains the full source catalogue of all 155 radio sources detected with S/N≥6 in the Very Large Array 3GHz continuum survey of the XXL-North field. The observations covered the 0.7x0.7 square degrees subarea of the 25 square degree XXL-North field. The radio data has an angular resolution of 3.2x1.9 square arcsec and a mean rms of 20uJy per beam. There are 25 resolved sources, of which 8 are multicomponent objects. Paper XI. ATCA 2.1 GHz continuum observations. The table xxl_atca.dat contains the full source catalogue of all 1389 radio sources detected with S/N≥5 in the Australia Telescope Compact Array 2.1GHz continuum pilot survey of the XXL-South field. The observations covered the inner 6.5 square degrees of the 25 square degree XXL-South field. The radio data has an angular resolution of 4.7x4.2 square arcsec and a median rms of 50uJy per beam. There are 305 resolved sources, of which 77 are multicomponent objects. The table contains various observed parameters of the radio sources, such as position, peak flux density and signal-to-noise ratio. Paper XIV. AAOmega redshifts for the southern XXL field. We present a catalogue (xxlaaoz.dat) containing the redshifts of 3660 X-ray selected targets in the XXL southern field. The redshifts were obtained with the AAOmega spectrograph and 2dF fibre positioner on the Anglo-Australian Telescope. The catalogue contains 1515 broad line AGN, 528 stars, and redshifts for 41 out of the 49 brightest X-ray selected clusters in the XXL southern field. Paper XV. Evidence for dry merger driven BCG growth in XXL-100-GC X-ray clusters Given the availability of good quality multiband photometry together with photometric and spectroscopic redshifts to z<1, a simple set of criteria can be used to identify BCGs. For the present work, we define a BCG as: - the brightest galaxy in z-band, - within 0.5xr500 of the cluster X-ray centroid, - with a redshift that is consistent with that of the cluster as determined from all the redshifts available around the X-ray centroid. Our final sample (xxl100bc.dat) consists of 85 clusters, 45 of which are in the Northern field and 40 in the Southern field. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file xxlpoint.dat 65 622 List of XMM pointings in XXL survey xxl100gc.dat 128 107 the XXL-100-GC catalogue xxl1000a.dat 305 1000 The XXL1000AGN catalogue xxl_vla.dat 141 155 VLA 3GHz sources in XXL-N list.dat 99 1 Information on VLA fits image xxl-vla.fits 2880 84095 VLA fits image xxl_atca.dat 159 1389 ATCA pilot sample in XXL-S xxlaaoz.dat 67 3660 XXL AAOmega redshift catalogue xxl100bc.dat 84 85 Summary of XXL-100-GC clusters and BCGs properties
See also: http://cosmosdb.iasf-milano.inaf.it/XXL : XXL Master Catalogue http://data-portal.hpc.swin.edu.au/dataset/xxl-aaomega-redshift-catalogue : XXL AAOmega redshift catalogue Byte-by-byte Description of file: xxlpoint.dat
Bytes Format Units Label Explanations
1- 10 A10 --- ObsId ESA XMM log observation identifier 12- 22 A11 --- FieldName XXL pointing identifier (1) 24- 32 F9.5 deg RAdeg Pointing Right ascension (J2000) 34- 42 F9.5 deg DEdeg Pointing Declination (J2000) 44- 47 F4.1 ks ExpM1 MOS1 exposure time (2) 49- 52 F4.1 ks ExpM2 MOS2 exposure time (2) 54- 57 F4.1 ks Exppn pn exposure time (2) 59 A1 --- Qual [0-3] Quality Flag (3) 61 A1 --- Badfield [0-3] Badfield Flag (4) 63 A1 --- db [X] database presence flag (5) 65 A1 --- cat [X] catalogue presence flag (6)
Note (1): XXLn or XXLs stand for the XXL-N (XXL-S) field; a,b,c... tags indicate that the same a,b,c... tags indicate that the same sky position has been observed several times in different AOs (consult the ESA XMM log using the ESA ObsId) because the quality of earlier pointings was insufficient; the z tag means that a fictitious pointing has been created combining the events of all usable repeated pointings, in order to improve the quality. In total there are 542 and 81 a,b,c and z pointings respectively. In case of repeated fields, as well as of overlaps from adjacent fields, the X-ray catalogue will remove overlapping detections, and consider only the one from the better pointing, or, in case of equal quality, the object with the smallest off-axis angle. Note (2): The exposure for the MOS and pn detectors is the remaining exposure (in ks) after selection of the good-time intervals. Note (3): Quality flag as follows: 0 = good quality 1 = low exposure 2 = high background 3 = low exposure and high background Note (4): Badfield flag as follows: 0 = best acceptable observation at a given position 1 = for deep/good observation from the archives, not part of XXL proper 2 = other acceptable XXL observation at same position 3 = bad pointings i.e. quality=3 This flag is used in the overlap removal procedure Note (5): This column is ticked if Xamin detected at least one object in this pointing. Note (6): This column is ticked if at least one source in this pointing survived the overlap removal procedure and hence entered the X-ray source catalogue.
Byte-by-byte Description of file: xxl100gc.dat
Bytes Format Units Label Explanations
1- 5 A5 --- --- [XLSSC] 7- 9 I3 --- XLSSC IAU XLSSC cluster identifier 11- 17 F7.3 deg RAdeg Cluster Right ascension (J2000) 19- 25 F7.3 deg DEdeg Cluster Declination (J2000) 27- 31 F5.3 --- z Cluster redshift 33- 34 I2 --- Ngal Number of galaxies used to determine z 36- 39 I4 ct C60 Counts within 60" in [0.5-2]keV 41- 45 F5.2 10-17W/m2 F60 Flux within 60" in [0.5-2]keV 47- 50 F4.2 10-17W/m2 e_F60 rms uncertainty on F60 52- 55 F4.2 --- Ez ? evolution term E(z) 57- 60 F4.2 Mpc r500MT Radius at overdensity 500 from MT relation (1) 62- 66 F5.2 keV T300kpc ? Temperature in aperture 300kpc (2) 69- 73 F5.2 keV E_T300kpc ? Plus side error bar on T300kpc 75- 79 F5.2 keV e_T300kpc ? Minus side error bar on T300kpc 81- 85 F5.2 10+36W LXXL300kpc ? 0.5-2keV luminosity in 300kpc (3) 87- 90 F4.2 10+36W e_LXXL300kpc ? rms uncertainty on LXXL300kpc 92- 97 F6.2 10+36W Lbol500MT ? bolometric luminosity in r500MT (1) 99-102 F4.2 10+36W e_Lbol500MT ? rms uncertainty on Lbol500MT 104-108 F5.2 10+13Msun M500MT ? Mass within r500MT (4) 110-114 F5.2 10+13Msun e_M500MT ? rms uncertainty on M500MT 116-120 F5.2 10+13Msun Mgas500 ? Gas mass within r500MT (5) 122-126 F5.2 10+13Msun e_Mgas500 ? rms uncertainty on Mgas500 128 A1 --- Flag [0-2] Supplementary object flag (6)
Note (1): r500MT from T300kpc and the M500-T300kpc relation of paper IV. Note (2): T300kpc: not core excised, from Table 1 of paper III. Note (3): LXXL300kpc and Lbol500MT from Table 1 of Paper III. Note (4): M500MT from T300kpc and the M500-T300kpc relation of paper IV. Note (5): Mgas500 from Table A.1 of paper XIII. Note (6): Supplementary flag as follows: 0 = cluster in main sample of 100 brightest clusters (Table D.1 of paper II) 1 = supplementary cluster detected in bad pointing (Table D.2 of paper II) 2 = supplementary cluster not part of pipeline (Table D.2 of paper II)
Byte-by-byte Description of file: xxl1000a.dat
Bytes Format Units Label Explanations
1- 5 A5 --- --- [3XLSS] 7- 22 A16 --- 3XLSS IAU-style 3XLSS catalogue name (JHHMMSS.s+DDMMSS) 24- 31 F8.4 deg RAdeg X-ray Right ascension (J2000) 33- 40 F8.4 deg DEdeg X-ray Declination (J2000) 42- 52 E11.5 mW/m2 Bflux ? Pipeline flux in band B [0.5-2 keV] 54- 64 E11.5 mW/m2 CDflux ? Pipeline flux in band CD [2-10 keV] 66- 76 E11.5 mW/m2 Fmode Mode of 2-10keV spectral fit flux 78- 88 E11.5 mW/m2 e_Fmode 68% confidence lower limit for fit flux 90-100 E11.5 mW/m2 E_Fmode 68% confidence upper limit for fit flux 102-112 E11.5 mW/m2 Fmed Median of 2-10keV spectral fit flux 114-117 F4.2 --- Gmode Mode of fitted photon index (Gammamode) 119-122 F4.2 --- e_Gmode 68% confidence lower limit for Gamma 124-127 F4.2 --- E_Gmode 68% confidence upper limit for Gamma 129-132 F4.2 --- Gmed Median of fitted photon index (Gammamedian) 134-144 E11.5 cm-2 NHmode Mode of fitted NH (atom/cm2) 146-156 E11.5 cm-2 e_NHmode 68% confidence lower limit for NH (atom/cm2) 158-168 E11.5 cm-2 E_NHmode 68% confidence upper limit for NH (atom/cm2) 170-180 E11.5 cm-2 NHmed Median of fitted NH (atom/cm2) 182 A1 --- Xflag [0-5] X-ray spectrum quality flag (1) 184-191 F8.4 deg RACdeg ? Counterpart Right ascension (J2000) 193-200 F8.4 deg DECdeg ? Counterpart Declination (J2000) 202-206 F5.2 mag gmag ? g band magnitude 208-211 F4.2 mag e_gmag ? Error on g band magnitude 213-217 F5.2 mag rmag ? r band magnitude 219-222 F4.2 mag e_rmag ? Error on r band magnitude 224-228 F5.2 mag imag ? i band magnitude 230-233 F4.2 mag e_imag ? Error on i band magnitude 235-239 F5.2 mag zmag ? z band magnitude 241-244 F4.2 mag e_zmag ? Error on z band magnitude 246-249 A4 --- r_photo Parent survey(s) for griz photometry (2) 251-255 F5.3 --- zsp ? Spectroscopic redshift 257-275 A19 --- r_zsp ? Parent survey (spectroscopy) 277-281 F5.3 --- zph ? Photometric redshift 283-287 F5.3 --- e_zph ? 68% confidence zphot lower limit 289-293 F5.3 --- E_zph ? 68% confidence zphot upper limit 295 I1 --- zphClass ? Classification for best zphot (3) 297-300 F4.2 --- Pstar [0,1]? Probability to be a star 302-305 F4.2 --- Poutlier [0,1]? Probability to be an outlier (4)
Note (1): The values of the Xflag are specified in Table 2 of the paper. Table 2: X-ray spectral quality classes defined based on the XMM pointing quality and the signal-to-noise ratio (S/N) of the spectrum. --------------------------------------------------------------------------- Flag Quality class N FXamin/Ffit PN counts MOS1 counts MOS2 counts Pointing S/N med mean sigma min max med min max med min max med ------------------------------------------------------------------------------ 1 0 >6 547 1.00 1.0 0.3 25 11194 268 13 2626 105 6 2651 107 2 0/1/2 >4 281 1.01 1.1 0.5 8 1879 103 3 244 43 6 415 40 3 0/1/2 3-4 75 1.07 2 3 6 246 43 2 49 23 4 81 20 4 0/1/2 <3 96 0.78 52 191 3 177 16 1 34 6 1 55 5 5 NoData - 1 - - - - - - 2 2 - 1 1 - ------------------------------------------------------------------------------ Note (2): 4-letter code where each character gives the origin of the griz magnitude (blank if counterpart missing or not in the optical band). The 1-character survey code is: C = CFHT S = SDSS B = BCS D = DECam Note (3): Photometric class as follows: 1 = passive 2 = starforming 3 = starburst 4 = AGN 5 = QSO Note (4): Probability to have |zph-zsp|>0.15(1+zsp).
Byte-by-byte Description of file: xxl_vla.dat
Bytes Format Units Label Explanations
1- 3 I3 --- ID Source identifier name 5- 14 F10.7 deg RAdeg Right ascension (J2000) 16- 25 F10.7 deg DEdeg Declination (J2000) 27- 28 I2 h RAh Right ascension (J2000) 30- 31 I2 min RAm Right ascension (J2000) 33- 37 F5.2 s RAs Right ascension (J2000) 39 A1 --- DE- Declination sign (J2000) 40- 41 I2 deg DEd Declination (J2000) 43- 44 I2 arcmin DEm Declination (J2000) 46- 50 F5.2 arcsec DEs Declination (J2000) 52- 57 F6.2 arcsec e_RAs ?=-99.99 Positional error on RA (1) 59- 64 F6.2 arcsec e_DEs ?=-99.99 Positional error on DE (1) 66- 72 F7.2 uJy/beam Speak ?=-99.99 Peak surface brightness at 3GHz(1) 74- 79 F6.2 uJy/beam e_Speak ?=-99.99 Error on peak surface brightness (1) 81- 87 F7.2 uJy Stotal Total flux density at 3GHz (2) 89- 93 F5.2 uJy e_Stotal Error on total flux density 95 A1 --- Res [0-1] Resolved flag (3) 97 A1 --- SL [0-1] Sidelobe flag (4) 99 A1 --- Mult [0-1] Multicomponent flag (5) 101-106 F6.2 arcsec maj ?=0 Deconvolved major axis (1)(6) 108-113 F6.2 arcsec e_maj ?=0 Deconvolved major axis (1)(6) 115-120 F6.2 arcsec min ?=0 Deconvolved minor axis (1)(6) 122-127 F6.2 arcsec e_min ?=0 Deconvolved minor axis (1)(6) 129-134 F6.2 deg PA ?=0 Deconvolved position angle (1)(6) 136-141 F6.2 deg e_PA ?=0 Deconvolved position angle (1)(6)
Note (1): undefined (-99.99) for multicomponent sources Note (2): Equal to the peak surface brightness for unresolved sources Note (3): Resolved flag as follows: 0 = Unresolved 1 = Resolved Note (4): Sidelobe flag as follows: 1 = source located on a sidelobe Note (5): Multicomponent flag as follows: 0 = Single component 1 = Multicomponent Note (6): minor and major axes and PA set to 0 for unresolved sources.
Byte-by-byte Description of file: list.dat
Bytes Format Units Label Explanations
1- 9 F9.5 deg RAdeg Right Ascension of center (J2000) 10- 18 F9.5 deg DEdeg Declination of center (J2000) 20- 23 I4 --- Nx Number of pixels along X-axis 25- 28 I4 --- Ny Number of pixels along Y-axis 30- 55 A26 --- Obs.Date Observation date 57- 65 E9.4 Hz Freq Observed frequency 67- 72 I6 Kibyte size Size of FITS file 74- 85 A12 --- FileName Name of FITS file 87- 99 A13 --- Title Title of the FITS file
Byte-by-byte Description of file: xxl_atca.dat
Bytes Format Units Label Explanations
1- 8 A8 --- --- [XXL-ATCA] 10- 25 A16 --- Name Source identifier name (JHHMMSS.s+DDMMSS) 27- 37 F11.7 deg RAdeg Right ascension (J2000) 39- 49 F11.7 deg DEdeg Declination (J2000) 51- 52 I2 h RAh Right ascension (J2000) 54- 55 I2 min RAm Right ascension (J2000) 57- 62 F6.3 s RAs Right ascension (J2000) 64 A1 --- DE- Declination sign (J2000) 65- 66 I2 deg DEd Declination (J2000) 68- 69 I2 arcmin DEm Declination (J2000) 71- 76 F6.3 arcsec DEs Declination (J2000) 78- 83 F6.2 arcsec e_RAs ?=-99 Positional error on RA (1) 85- 90 F6.2 arcsec e_DEs ?=-99 Positional error on DE (1) 92- 98 F7.3 mJy/beam Speak ?=-99 Peak surface brightness at 2.1GHz (1) 100-106 F7.3 mJy/beam e_Speak ?=-99 Error on Speak (in mJy/beam) (1) 108-114 F7.3 mJy Stotal Total flux density at 2.1GHz (2) 116-122 F7.3 mJy e_Stotal ?=-99 Error on Stotal (1) 124-128 F5.3 mJy rms Noise level at the source position 130-134 F5.2 arcsec maj ?=0 Deconvolved major axis (3) 136-140 F5.2 arcsec min ?=0 Deconvolved minor axis (3) 142-147 F6.2 deg PA ?=0 Deconvolved position angle (3) 149 A1 --- Res [0/1] Resolved flag (4) 151 A1 --- Mult [0/1] Multicomponent flag (5) 153-159 F7.2 --- SNR Signal-to-noise ratio
Note (1): undefined (-99) for multicomponent sources Note (2): Equal to the peak surface brightness for unresolved sources Note (3): minor and major axes and PA set to 0 for unresolved sources Note (4): Resolved flag as follows: 0 = Unresolved 1 = Resolved Note (5): Multicomponent flag as follows: 0 = Single component 1 = Multicomponent
Byte-by-byte Description of file: xxlaaoz.dat
Bytes Format Units Label Explanations
1- 11 A11 --- --- [XXL-AAOmega] 13- 31 A19 --- XXLname XXL Name (JHHMMSS.ss+DDMMSS.s) 33- 39 F7.3 deg RAdeg Right ascension (J2000) 41- 48 F8.4 deg DEdeg Declination (J2000) 50- 58 F9.6 --- z Redshift 60 I1 --- q_z Flag for redshift quality (1) 62- 67 A6 --- Com Comment
Note (1): Redshift quality flag as follows: 6 = star 4 = the redshift is likely to be correct more than 99% of the time 3 = the redshift is likely to be correct about 95% of the time
Byte-by-byte Description of file: xxl100bc.dat
Bytes Format Units Label Explanations
1- 5 A5 --- --- [XLSSC] 7- 9 I3 --- XLSSC IAU XLSSC cluster identifier 11- 15 F5.3 --- zCl Cluster redshift 17- 18 I2 10+13Msun M500 ?=- Mass inside of r500 20- 21 I2 10+13Msun e_M500 ? rms uncertainty in M500 23- 27 F5.3 Mpc r500 Radius at overdensity 500 from MT relation (1) 29- 36 F8.4 deg RAdeg BCG right ascension (J2000) 38- 45 F8.4 deg DEdeg BCG declination (J2000) 47- 51 F5.3 --- zBCG ?=- BCG redshift 53- 56 F4.1 arcsec Offset BCG offset from the X-ray centroid in arcsec unit 58- 62 F5.3 --- Offset500 BCG offset from the X-ray centroid in r500 unit 64- 68 F5.2 10+11Msun BGCMass BCG stellar mass 70 A1 --- --- [+] 71- 74 F4.2 10+11Msun E_BGCMass Error on BGCMass (upper value) 75 A1 --- --- [-] 76- 79 F4.2 10+11Msun e_BGCMass Error on BGCMass (upper value) 81- 84 F4.2 mag Dm12 z-band magnitude difference between the brightest and second brightest cluster members
Note (1): r500 from T300kpc and the M500-T300kpc relation of paper IV (Lieu et al., 2016A&A...592A...4L).

(End) cat 2018-Mar-28 Acknowledgements: Marguerite Pierre, marguerite.pierre(at)cea.fr Lucio Chiappetti, lucio(at)lambrate.inaf.it Florian Pacaud , fpacaud(at)astro.uni-bonn.de Paul A. Giles , P.Giles(at)bristol.ac.uk Maggie Lieu , mlieu(at)star.sr.bham.ac.uk Dominique Eckert, Dominique.Eckert(at)unige.ch Sotiria Fotopoulou, sotiria.fotopoulou(at)unige.ch Nikola Baran, nbaran(at)phy.hr Vernesa Smolcic, vs(at)phy.hr, Jacinta Delhaize, jacinta(at)phy.hr References: Pierre et al., Paper I 2016A&A...592A...1P Pacaud et al., Paper II 2016A&A...592A...2P Giles et al., Paper III 2016A&A...592A...3G Lieu et al., Paper IV 2016A&A...592A...4L Mantz et al. Paper V 2014ApJ...794..157M Fotopoulou et al., Paper VI 2016A&A...592A...5F Pompei et al., Paper VII 2016A&A...592A...6P Adami et al., Paper VIII 2016A&A...592A...7A Baran et al., Paper IX 2016A&A...592A...8B Ziparo et al., Paper X 2016A&A...592A...9Z Smolic et al., Paper XI 2016A&A...592A..10S Koulouridis et al., Paper XII 2016A&A...592A..11K Eckert et al., Paper XIII 2016A&A...592A..12E Lidman et al., Paper XIV 2016PASA...33....1L Lavoie et al., Paper XV 2016MNRAS.462.4141L History: * 15-Jun-2016: on-line version * 19-Sep-2016: units od LXXL300kpc and Lbol500MT in xxl100gc.dat file corrected * 28-Mar-2018: table xxl100bc.dat from Paper XV added
(End) XXL team [XXL], Patricia Vannier [CDS] 10-Jun-2016
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