Brera Multi-scale Wavelet Chandra Source Catalog

Brera Multi-scale Wavelet Chandra Source Catalog BMWCHANCAT ivo://nasa.heasarc/bmwchancat NASA/GSFC HEASARC Romano et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains the BMW-Chandra source catalog drawn from essentially all Chandra ACIS-I pointed observations with an exposure time in excess of 10 ks that were public as of March 2003 (136 observations). Using the wavelet detection algorithm developed by Lazzati et al. (1999ApJ...524..414) and Campana et al. (1999ApJ...524..423C), which can characterize both point-like and extended sources, the authors identified 21325 sources. Among them, 16758 are serendipitous, i.e. not associated with the targets of the pointings, and do not require a non-automated analysis. This makes this catalog the largest compilation of Chandra sources as of the date of publication of this catalog (August 2008). The 0.5 - 10 keV absorption corrected fluxes of these sources range from ~3 x 10-16 to 9 x 10-12 erg/cm2/s with a median of 7 x 10-15 erg/cm2/s. The catalog consists of count rates and relative errors in three energy bands (total, 0.5 - 7 keV; soft, 0.5 - 2 keV; and hard, 2 - 7 keV), and source positions relative to the highest signal-to-noise detection among the three bands. The wavelet algorithm also provides an estimate of the extension of the source. The authors include information drawn from the headers of the original files, as well, and extracted source counts in four additional energy bands, SB1 (0.5 - 1 keV), SB2 (1 - 2 keV), HB1 (2 - 4 keV), and HB2 (4 - 7 keV). They computed the sky coverage for the full catalog and for a subset at high Galactic latitude (|b| > 20 degrees). The complete catalog provides a sky coverage in the soft band (0.5 - 2 keV, S/N = 3) of ~8 deg2 at a limiting flux of 10-13 erg/cm2/s, and ~2 deg2 at a limiting flux of ~10-15 erg/cm2/s. The total numbers of matches with the FIRST, IRASPSC, 2MASS, and GSC2 catalogs obtained after a closest-distance selection are 13, 87, 6700, and 4485, respectively. This table was created by the HEASARC in September 2008 based on the CDS table J/A+A/488/1221 file catalog.dat. The catalog version is BMC 1.0.1F. All sources in this version of the catalog were from observations in POINTING and TIMED ACIS read modes. This is a service provided by NASA HEASARC . 2008A&A...488.1221R https://heasarc.gsfc.nasa.gov/W3Browse/all/bmwchancat.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=bmwchancat& GET text/xml 180 99999 true 48.33834167 -77.02005 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=bmwchancat GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_bmwchancat&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CHANDRA 0.0166666666666667 Radio public bmwchancat Brera Multi-scale Wavelet Chandra Source Catalog name IAU-Style Source Designation meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable hb_count_rate Hard-Band Count Rate ct/s phot;em.X-ray.medium double nullable hb_count_rate_error Hard-Band Count Rate Error ct/s stat.error;phot;em.X-ray.medium double nullable hb_flux Hard-Band Flux (erg/s/cm^2) erg/s/cm^2 phot.flux;em.X-ray.medium double nullable y_pixel Source Y Coordinate pixel pos.cartesian.y;instr.pixel double nullable error_radius Total Positional Error (arcsec) arcsec stat.error;pos double nullable lii Galactic Longitude degree pos.galactic.lon double nullable count_rate_error Total-Band Count Rate Error ct/s stat.error;phot.count;em.X-ray double nullable x_pixel Source X Coordinate pixel pos.cartesian.x;instr.pixel double nullable sb_psf_corr_factor Soft-Band PSF Correction Factor instr.param double nullable hb_counted_counts Hard-Band Counted Source Counts ct phot;em.X-ray.medium double nullable wt_probability WT Probability stat.probability double nullable sb_counts_error Soft-Band Error in Counts from Fit ct stat.error;phot;em.X-ray.soft double nullable hb_vignetting_factor Hard-Band Vignetting Correction Factor instr.param double nullable hb_wavelet_snr Hard-Band SNR in Wavelet Space stat.snr;em.X-ray.medium double nullable full_band_flux Absorption-Corrected 0.5-10keV Flux (erg/s/cm^2) erg/s/cm^2 phot.flux;em.X-ray double nullable hb_counted_bck_counts Hard-Band Counted Background Counts ct stat.error;phot;em.X-ray.medium double nullable counted_band2_counts 1-2keV Counted Source Counts ct/s phot;em.X-ray.soft double nullable wt_width_flag Flag [01] Indicates Meaningfulness of Width (1=fixed==PSF) meta.code;stat.value;phys.angSize short nullable dec_error Error in Source Declination (arcsec) arcsec stat.error;pos.eq.dec;meta.main double nullable hb_psf_corr_factor Hard-Band PSF Correction Factor instr.param double nullable sb_counted_counts Soft-Band Counted Source Counts ct phot;em.X-ray.soft double nullable vignetting_factor Total-Band Vignetting Correction Factor instr.param double nullable flux Total-Band Flux (erg/s/cm^2) erg/s/cm^2 phot.flux;em.X-ray double nullable wt_width Width of WT Gaussian (arcsec) arcsec stat.value;phys.angSize double nullable sb_count_rate Soft-Band Count Rate ct/s phot;em.X-ray.soft double nullable off_axis Off-Axis Angle (arcmin) arcmin instr.offset double nullable hb_snr Hard-Band SNR of the Detection stat.snr;em.X-ray.medium double nullable rebin_number Rebin Source Was Found (1/2) stat.value short nullable bii Galactic Latitude degree pos.galactic.lat double nullable sb_vignetting_factor Soft-Band Vignetting Correction Factor instr.param double nullable frame_time Commanded Exposure Time (s) s obs.param double nullable field_target_dec_j2000 Nominal Target Declination (J2000 Sexagesimal) pos.eq.dec;obs char nullable hb_counts_error Hard-Band Error in Counts from the Fit ct stat.error;em.X-ray.medium double nullable flux_cr_corfac Counts in (0.5-7keV) vs Flux in (0.5-10keV) erg/s/cm^2/ct arith.factor;phot.flux double nullable sequence_number Observation Sequence Number meta.id;obs int nullable sb_snr Soft-Band SNR of the Detection stat.snr;em.X-ray.soft double nullable counts_error Total-Band Error in Counts from the Fit ct stat.error;phot;em.X-ray double nullable src_wt_scale Scale at Which Source Was Found stat.value short nullable snr Total-Band SNR of the Detection stat.snr;em.X-ray double nullable quality_flag_1 Quality Flag: 1=ok; <-1 Decreasing Quality meta.code.qual short nullable chi_squared Chi-Squared of Fit stat.fit.chi2 double nullable counted_counts Total-Band Counted Source Counts ct phot;em.X-ray double nullable sb_count_rate_error Soft-Band Count Rate Error ct/s stat.error;phot;em.X-ray.soft double nullable sb_counted_bck_counts Soft-Band Counted Background Counts ct phot;instr.background;em.X-ray.soft double nullable obsid Observation ID Number of the Target meta.id;obs short nullable cross_match_flag_1 Flag [01] Indicates Match in Merged Catalog? {1=yes,0=no} meta.code short nullable hb_counts Hard-Band (2-7keV) Counts from the Fit ct phot;em.X-ray.medium double nullable ra_error Error in Source Right Ascension (arcsec) arcsec stat.error;pos.eq.ra;meta.main double nullable counted_band4_counts 4-7keV Counted Source Counts ct/s phot;em.X-ray.medium double nullable bck_sb_counts Soft-Band Mean Background Counts ct/pixel phot;instr.background;em.X-ray.soft double nullable counted_bck_counts Total-Band Counted Background Counts ct phot;instr.background;em.X-ray double nullable psf_corr_factor Total-Band PSF Correction Factor instr.param double nullable bck_hb_counts Hard-Band Mean Background Counts ct/pixel phot;instr.background;em.X-ray.medium double nullable counts Total-Band (0.5-7keV) Counts from the Fit ct phot;em.X-ray double nullable extent_flag Flag Indicates Extension (POINT/EXTENDED) meta.code;phys.angSize char nullable field_target Target Designation meta.id char nullable end_time Date and Time of Observation Stop mjd time.end;obs double nullable sb_wavelet_snr Soft-Band SNR in Wavelet Space stat.snr;em.X-ray.soft double nullable full_band_obs_flux Flux in 0.5-10keV Band erg/s/cm^2 phot.flux;em.X-ray double nullable sb_flux Soft-Band Flux erg/s/cm^2 phot.flux;em.X-ray.soft double nullable counted_band3_counts 2-4keV Counted Source Counts ct/s phot;em.X-ray.medium double nullable quality_flag_2 Quality Flag: -1 to Inspect, <-1 Decreasing Quality meta.code.qual short nullable wavelet_snr Total-Band SNR in Wavelet Space stat.snr;em.X-ray double nullable source_number Sequential Identification Number for Each Source in Catalog meta.id;src int nullable counted_band1_counts 0.5-1keV Counted Source Counts ct/s phot;em.X-ray.soft double nullable cross_match_flag_2 Flag [01] Indicates Match in Merged Catalog? {1=yes,0=no} meta.code short nullable nominal_exposure Total Exposure Time (s) s time.duration;obs.exposure double nullable wt_width_error Error in Width of WT Gaussian (arcsec) arcsec stat.error;stat.value;phys.angSize double nullable bck_counts Total-Band Mean Background Counts ct/pixel phot;instr.background;em.X-ray double nullable count_rate Total-Band Count Rate ct/s phot.count;em.X-ray double nullable exposure Effective Exposure Time (s) s time.duration;obs.exposure double nullable sb_counts Soft-Band (0.5-2keV) Counts from the Fit ct phot;em.X-ray.soft double nullable "time" Date and Time of Observation Start mjd time.start;obs double nullable ascds_version ASCDS Version Number meta.version char nullable field_target_nh Weighted Averaged NH (cm^-2) H-atoms/cm^2 phys.columnDensity double nullable field_target_ra_j2000 Nominal Target Right Ascension (J2000 Sexagesimal) pos.eq.ra;obs char nullable data_mode Data Mode instr.setup char nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable