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IX/34               The BMW-HRI source catalogue             (Panzera+, 2003)

The Brera Multi-scale Wavelet ROSAT HRI source catalogue (BMW-HRI). Panzera M.R., Campana S., Covino S., Lazzati D., Mignani R.P., Moretti A., Tagliaferri G. <Astron. Astrophys., 399, 351 (2003)> =2003A&A...399..351P
ADC_Keywords: X-ray sources Mission_Name: ROSAT Keywords: X-ray Abstract: We present the Brera Multi-scale Wavelet ROSAT HRI source catalogue (BMW-HRI) derived from all ROSAT HRI pointed observations with exposure time longer than 100s available in the ROSAT public archives. The data were analyzed automatically using a wavelet detection algorithm suited to the detection and characterization of both point-like and extended sources. This algorithm is able to detect and disentangle sources in very crowded fields and/or in presence of extended or bright sources. Images have been also visually inspected after the analysis to ensure verification. The final catalogue, derived from 4,303 observations, consists of 29,089 sources detected with a detection probability of greater or equal 4.2sigma. For each source, the primary catalogue entries provide name, position, count rate, flux and extension along with the relative errors. In addition, results of cross-correlations with existing catalogues at different wavelengths (FIRST, IRAS, 2MASS and GSC2) are also reported. All these information are available on the web via the DIANA Interface. As an external check, we compared our catalogue with the previously available ROSHRICAT catalogue (both in its short and long versions) and we were able to recover, for the short version, ∼90% of the entries. We computed the sky coverage of the entire HRI data set by means of simulations. The complete BMW-HRI catalogue provides a sky coverage of 732 square degrees down to a limiting flux of ∼1x10-12erg/s/cm2 and of 10 square degrees down to ∼1x10-14erg/s/cm2. We were able to compute the cosmological log(N)-log(S) distribution down to a flux of about 1.2x10-14erg/s/cm2. Description: The BMW-HRI catalogue is generated from US and German ROSAT HRI observations for which data have been released to the US ROSAT archive at GSFC and to the German ROSAT archive at MPE up to December 2001. A total number of 4,303 observations with exposure times longer than 100 s were analyzed automatically using a wavelet detection algorithm. The catalogue consists of 29,089 sources (detection probability greater or equal 4.2 sigma). For each source name, position, count rate, flux and extension along with the relative errors are given.The catalogue also reports results of cross-correlations with existing catalogues at different wavelengths (FIRST, GSC2, 2MASS, and IRAS). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 1332 29089 List of the 29,089 sources of the BMW-HRI catalogue
See also: IX/28 : ROSAT HRI Pointed Observations (1RXH) (ROSAT Team, 2000) B/2mass : The 2MASS database (IPAC/UMass, 2000) II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986) VIII/59 : The FIRST Survey, version 1999Jul (White+ 1999) I/271 : The Guide Star Catalog, Version 2.2 (GSC2.2) (STScI, 2001) Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [1BMW] 5- 19 A15 --- 1BMW Name of the source (Jhhmmss.-ddmmss) 21- 22 I2 h RAh Right ascension (J2000) 24- 25 I2 min RAm Right ascension (J2000) 27- 31 F5.2 s RAs [0/60] Right ascension (J2000) 37 A1 --- DE- Declination sign 38- 39 I2 deg DEd Declination (J2000) 41- 42 I2 arcmin DEm Declination (J2000) 44- 47 F4.1 arcsec DEs [0/60] Declination (J2000) 53- 67 F15.8 arcsec e_RAs Right ascension error 69- 83 F15.8 arcsec e_DEs Declination error 85- 99 F15.8 arcsec e_pos Total positional error 101-111 F11.7 deg GLON Galactic longitude (LII) 113-123 F11.7 deg GLAT Galactic latitude (BII) 125-127 I3 --- Rebin Source rebin (1) 129-138 F10.3 pix Xpix Source x coordinate in pixels 140-149 F10.3 pix Ypix Source y coordinate in pixels 151-160 F10.6 arcmin Offax Source offset from Target position 162-190 A29 --- Target Field name 192-201 A10 --- RAtarget Target right ascension (J2000) 208-219 A12 --- DEtarget Target declination (J2000) 226-231 A6 --- ROR Observation ROSAT observation request (ROR) number 233-243 A11 --- Seq Sequence ID 249-256 A8 --- StartDate Start observation date 260-271 A12 --- StartTime Start observation time 276-283 A8 --- EndDate End observation date 287-298 A12 --- EndTime End observation time 302-312 F11.3 s Exp Nominal exposure time of the field 314-323 F10.2 s Expreal Exposure time from the exposure map 325-328 I4 --- nreb1 Number of sources detected at rebin=1 330-333 I4 --- nreb3 Number of sources detected at rebin=3 335-338 I4 --- nreb6 Number of sources detected at rebin=6 340-343 I4 --- nreb10 Number of sources detected at rebin=10 344-355 F12.6 --- S/R Signal-to-noise ratio 356-367 F12.5 --- waveS/R S/R in the wavelet space 371-378 F8.5 --- Prob Wavelet Probability (11) 380-394 F15.11 ct/s CR Source count rate 396-410 F15.11 ct/s CRerr1 CR error from the fit procedure (Err1) 412-426 F15.11 ct/s CRerr2 CR error from statistics (Err2) 428-442 F15.11 ct/s e_CR CR error (max Err1,Err2) 444-458 F15.5 ct Count Total counts detected (CR per Exp) 460-469 F10.6 --- vign Vignetting correction 471-480 F10.5 --- PSF PSF correction 481-496 F16.11 ct/s CRcount Source CR from the counting procedure 497-512 F16.11 ct/s e_CRcount Source CRcounted error 514-528 F15.11 ct/s CRBack Background count rate 530-537 F8.6 --- Near Number of sources within 2 sigma from source 539-548 E10.2 10+4/m2 NH Weighted average NH 550-562 E13.7 mJ/m2/ct CF1 Conversion for a low column density (2) 564-576 E13.7 mW/m2 FX1 HRI X-ray flux (CF1) 578-590 E13.7 mJ/m2/ct CF2 Conversion factor (NH) for a full column density (2) 592-604 E13.7 mW/m2 FX2 HRI X-ray flux (CF2) 606-615 F10.5 arcsec Extension Sigma of the source from the fit procedure 617-630 F14.9 arcsec e_Extension Sigma source error 634 A1 --- Flag1 Fixed sigma? (Y/N) 637-646 A10 --- Flag2 Extended sources? (Point/Extended) (3) 648-657 F10.6 --- Sign Significativity of the extension (3) 659-669 F11.6 --- Chi2 Chi2 from the fit procedure 673-679 A7 --- Catver Catalogue version 683-693 A11 --- SASSver Version of the SASS processing system -------------------------------------------------------------------------------- 695-709 A15 --- FIRSTname FIRST source name (VIII/59) (4) 712-723 F12.8 deg RAdegFIRST ?=999.99999999 Right ascension (J2000) 725-736 F12.8 deg DEdegFIRST ?=999.99999999 Declination (J2000) 738 A1 --- W ? Warning flag for sidelobe source (5) 740-749 F10.4 mJy Fpeak ?=99999.9999 Peak flux density 751-760 F10.4 mJy Iflux ?=99999.9999 Integrated flux density 762-771 F10.4 mJy RMS ?=99999.9999 Local noise estimate at the source position 773-782 F10.4 arcsec MajAxis ?=99999.9999 Major axes after deconvolution (FWHM) (6) 784-793 F10.4 arcsec MinAxis ?=99999.9999 Minor axes after deconvolution (FWHM) (6) 795-802 F8.2 deg PAFIRST ?=99999.99 Position angle after deconvolution 804-813 F10.4 arcsec fMajAxis ?=99999.9999 Major axis before deconvolution (FWHM) 815-824 F10.4 arcsec fMinAxis ?=99999.9999 Minor axis before deconvolution (FWHM) 826-833 F8.2 deg fPA ?=99999.99 Position angle before deconvolution 835-844 F10.6 arcsec FIRST-BMW ?=999.999999 Angular distance between FIRST and the BMW position 846-848 I3 --- FIRSTnum ?=999 Number of FIRST associated cross-correlated objects 850-861 A12 --- FIRSTver BMW-FIRST cross-correlation version -------------------------------------------------------------------------------- 864-878 A15 --- GSC2name ? GSC2 source name (I/271) (7) 879-890 F12.8 deg RAdegGSC2 ?=999.99999999 GSC2 right ascension (J2000) 892-903 F12.8 deg DEdegGSC2 ?=999.99999999 GSC2 declination (J2000) 905-916 F12.8 arcsec e_RAdegGSC2 ?=999.99999999 GSC2 right ascension error 918-929 F12.8 arcsec e_DEdegGSC2 ?=999.99999999 GSC2 declination error 931-942 F12.6 yr Epoch ?=99999.999999 GSC2 epoch 944-955 F12.6 mas/yr pmRA ?=99999.999999 RAGSC2 proper motion 957-968 F12.6 mas/yr pmDE ?=99999.999999 DEGSC2 proper motion 970-981 F12.8 mas/yr e_pmRA ?=999.99999999 RAGSC2 proper motion error 983-994 F12.8 mas/yr e_pmDE ?=999.99999999 DEGSC2 proper motion error 996-1002 F7.2 mag FmagGSC2 ?=9999.99 GSC2 F magnitude 1004-1010 F7.2 mag e_FmagGSC2 ?=9999.99 GSC2 F mag error 1012-1018 F7.2 mag JmagGSC2 ?=9999.99 GSC2 J magnitude 1020-1026 F7.2 mag e_JmagGSC2 ?=9999.99 GSC2 J mag error 1028-1034 F7.2 mag VmagGSC2 ?=9999.99 GSC2 V magnitude 1036-1042 F7.2 mag e_VmagGSC2 ?=9999.99 GSC2 V mag error 1044-1050 F7.2 mag NmagGSC2 ?=9999.99 GSC2 N magnitude 1052-1058 F7.2 mag e_NmagGSC2 ?=9999.99 GSC2 N mag error 1060-1066 F7.2 arcsec MajAxisGSC2 ?=9999.99 GSC2 semimajor axis 1068-1074 F7.2 --- eccent ?=9999.99 GSC2 eccentricity 1076-1082 F7.2 deg PAGSC2 ?=G9999.99 SC2 position angle 1084 I1 --- C ?=9 Class Code (8) 1086-1092 F7.2 arcsec GSC2-BMW ?=9999.99 Angular distance between GSC2 and the BMW position 1094-1096 I3 --- GSC2num ?=999 Number of GSC2 associated cross-correlated objects 1098-1108 A11 --- GSC2ver BMW-GSC2 cross-correlation version -------------------------------------------------------------------------------- 1110-1121 F12.6 deg RAdeg2MASS ?=99999.999999 2MASS (<B/2mass>) Right ascension (J2000) (9) 1123-1134 F12.6 deg DEdeg2MASS ?=99999.999999 2MASS Declination (J2000) 1136-1142 F7.3 mag Jmag2MASS ?=999.999 2MASS J magnitude 1144-1150 F7.3 mag e_Jmag2MASS ?=999.999 2MASS J mag error 1152-1158 F7.3 mag Hmag2MASS ? (?=999.999) 2MASS H magnitude 1160-1166 F7.3 mag e_Hmag2MASS ? (?=999.999) 2MASS H mag error 1168-1174 F7.3 mag Kmag2MASS ? (?=999.999) 2MASS K magnitude 1176-1182 F7.3 mag e_Kmag2MASS ? (?=999.999) 2MASS K mag error 1184-1193 F10.6 arcsec 2MASS-BMW ?=999.999999 Angular distance between 2MASS and the BMW position 1195-1197 I3 --- 2MASSnum ? (?=999) Number of 2MASS associated cross-correlated objects 1199-1210 A12 --- 2MASSver BMW-2MASS cross-correlation version -------------------------------------------------------------------------------- 1212-1225 A14 --- IRAS ? IRAS-PSC (II/125) source name (10) 1227-1236 F10.6 deg RAdegIRASPSC ?=999.999999 IRASPSC right ascension (J2000) 1238-1247 F10.6 deg DEdegIRASPSC ?=999.999999 IRASPSC declination (J2000) 1249-1258 F10.4 Jy F12um ?=99999.9999 12 micron non-color-corrected flux density 1260-1269 F10.4 Jy F25um ?=99999.9999 25 micron non-color-corrected flux density 1271-1280 F10.4 Jy F60um ?=99999.9999 60 micron non-color-corrected flux density 1282-1291 F10.4 Jy F100um ?=99999.9999 100 micron non-color-corrected flux density 1293-1299 F7.2 arcsec IRASPSC-BMW ?=9999.99 Angular distance between IRASPSC and the BMW position 1301-1302 I2 --- IRASPSCnum ?=99 Number of IRASPSC associated cross-correlated objects 1304-1314 A11 --- IRASPSCver BMW-IRASPSC cross-correlation version 1316-1324 A9 --- BMWver BMW cross-correlation version
Note (1): From each HRI event file we extracted and separately analysed 4 concentric images at increasing rebinning factors (pixel size 0.5, 1.5, 3 and 5 arcsec) in order to follow the instrumental PSF and to avoid the analysis of unnecessary large images. This column represents the rebin at which the source has been found. Note (2): The count-to-flux conversion factor was determined assuming as a reference a Crab spectrum (power law with photon index 2.0). A conversion factor was computed both for a very low column density (5x10+19x10+4/m2) and for the full galactic value. Note (3): To assess the source extension criterion we consider the distribution of the source extension (column Extension) as a function of the source off-axis angle. First we derived the mean value of the source extension (that is the HRI PSF) then we determined the 3 sigma dispertion on the mean. The mean value plus the 3 sigma dispersion provides the threshold for the source extension. We conservatively classify a source as extended (column Flag2=Extended) if the source extension error bar lies more than twice from the threshold. For extended sources the column Sign reports the number of sigma from the threshold. Note (4): A full description of all FIRST parameters can be found at the Web URL As the number of FIRST sources that cross-correlate with each BMW-HRI sources can be, in several cases, more than one, we decided to adopt the minimum distance approach. In this way all the FIRST parameters are relative to the nearest source. Note (5): W is a warning flag indicating that the source may be a sidelobe of a nearby bright source. Note (6): Noise can cause the fitted values of the major and minor axes (before deconvolution) to be smaller than the beam. The corresponding deconvolved size is given as zero in those cases. Note (7): A full description of the Guide Star Catalogue II can be found at the Web URL: As the number of GSC2 sources that cross-correlate with each BMW-HRI sources can be, in several cases, more than one, we decided to adopt the minimum distance approach. In this way all the GSC2 parameters are relative to the nearest source. Note (8): Class Code: 0: star 1: galaxy 2: blend 3: non-star 4: unclassified 5: defect Note (9): A full description of Two Micron All Sky Survey project can be found at the Web URL: As the number of 2MASS sources that cross-correlate with each BMW-HRI sources can be, in several cases, more than one, we decided to adopt the minimum distance approach. In this way all the 2MASS parameters are relative to the nearest source. Note (10): We cross-correlated the BMW-HRI catalogue with the IRAS Point Source Catalogue (PSC). See the Web URL for a description of this catalogue. As the number of IRASPSC sources that cross-correlate with each BMW-HRI sources can be, in several cases, more than one, we decided to adopt the minimum distance approach. In this way all the IRASPSC parameters are relative to the nearest source. Note (11): Wavelet probability in gaussian sigmas of the signal being spurious given the signal to noise in WT space and the mean number of counts per pixel. The detection algorithm and its application are fully described in Lazzati et al., 1999ApJ...524..414L and Campana et al., 1999ApJ...524..423C
Acknowledgements: Rosy Panzera
(End) Maria Rosa Panzera [Oss. Astr. Brera], Patricia Bauer [CDS] 29-Nov-2002
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