CMASCREEN ivo://nasa.heasarc/cmascreen NASA/GSFC HEASARC HEASARC 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Observation This database table contains the results of the sources detected from the two EXOSAT LE telescopes. Each telescope had a channel multiplier array, CMA, detector in the focal plane. The CMA/telescope combination covered the 0.05-2.0 keV energy range with a field of view of 2 degrees and an on-axis angular resolution of 20 arcseconds (HEW). The detectors had no intrinsic spectral capabilities; however, different filters were used to make broad band measurements. The most commonly used were thin Lexan (no. 7), Aluminum-Parylene (no. 6) and Boron (no. 8). An image was generated for each observation using a particular filter. A detection program was used to generate one database entry per source detected above a particular threshold. This catalog contains the list of detected sources, details about those detections, plus the names of the files containing the associated image and lightcurves. Since many objects were observed many times, there are multiple entries per object. The list of detections in this database table has been screened for quality. Only sources with qflag_le >= 3 are present. Please refer to the <a href="/W3Browse/exosat/cma.html">CMA</a> database table for the complete, unscreened list of detections. This database table was created by the HEASARC in August 2020, and it is based on a table created by the HEASARC in 1995 or earlier. The original CMA database table was created at the EXOSAT observatory during the post-operation phase (1986-1990) as part of the pipeline processing. These CMA results are part of the HEASARC data holdings from the start of the HEASARC. This is a service provided by NASA HEASARC . https://heasarc.gsfc.nasa.gov/W3Browse/all/cmascreen.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=cmascreen& GET text/xml 180 99999 true 10.19309005 -79.23894698 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=cmascreen GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_cmascreen&Action=More+Options&Action=Parameter+Search&ConeAdd=1 EXOSAT 0.0166666666666667 X-ray public cmascreen EXOSAT/CMA Sources (Screened for Quality) sequence_number Sequence Number meta.id;obs short nullable name Target 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 off_set Angular Distance from xpix=15, ypix=15 arcmin pos.distance;phys.polarization.linear double nullable exposure_time Exposure Time s time.duration;obs.exposure int nullable "time" Start Time of Observation mjd time.start;obs double nullable count_rate Count Rate for Source ct/s phot.count;em.X-ray.soft double nullable count_rate_error Error on Count Rate ct/s stat.error;phot.count;em.X-ray.soft double nullable filter Filterwheel Position instr;instr.filter short nullable instrument Experiment Code meta.code 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 entry_number Sequential Identification Number for Each Entry in Catalog meta.id short nullable class Browse Object Classification src.class short nullable quality_check Visual Quality of Detection meta.code.qual short nullable radio_flag Flag Indicates Radio Emission meta.code;em.radio short nullable iras_flux_1 12-micron IRAS Flux Jy phot.flux;em.IR.8-15um double nullable bo_count_rate_error Boron Count Rate Error ct/s stat.error;phot.count;em.X-ray.soft double nullable bv_color B-V Color phot.color;em.opt.B;em.opt.V double nullable x_pixels Centroid X (pixel*10) pos.cartesian.x;instr.pixel short nullable iras_flux_2 25-micron IRAS Flux Jy phot.flux;em.IR.15-30um double nullable bo_count_rate Boron Count Rate ct/s phot.count;em.X-ray.soft double nullable point_source_flag Point Source Flag meta.code short nullable qflag_le Quality Flag: 0(unusable)->5(best) meta.code short nullable observed_variance_ta1 Observed Variance in TA1 stat.variance double nullable y_pixels Centroid Y (pixel*10) pos.cartesian.y;instr.pixel short nullable pi_code Principal Investigator Code meta.code;obs.observer short nullable expected_variance_ta2 Expected Variance in TA2 stat.variance double nullable radio_5ghz_flux Radio Flux at 5 GHz mJy phot.flux.density;em.radio double nullable me_1_to_3_count_rate ME Count Rate in 1-3keV Band ct/s phot.count;em.X-ray.soft double nullable bii Galactic Latitude degree pos.galactic.lat double nullable error_radius Error Radius arcsec stat.error;pos short nullable ipc_count_rate IPC Count Rate ct/s phot.count;em.X-ray.soft double nullable serendipity_flag Flag for Serendipitous Sources meta.code short nullable iras_flux_3 60-micron IRAS Flux Jy phot.flux;em.IR.30-60um double nullable me_count_rate ME Count Rate ct/s phot.count;em.X-ray.soft double nullable lii Galactic Longitude degree pos.galactic.lon double nullable iras_flux_4 100-micron IRAS Flux Jy phot.flux;em.IR.60-100um double nullable old_nh_21cm NH (10^19 cm^-2) in the Galaxy 10^19_cm^-2 src.class.starGalaxy short nullable deadtime_correction_fact Detector Deadtime Correction Factor arith.factor;instr.det double nullable vmag V Magnitude phot.mag;em.opt.V double nullable nh_21cm 21-cm NH through the Galaxy H cm^-2 cm^-2 phys.columnDensity double nullable last_update Date of Last Record Update mjd meta.record double nullable redshift Redshift or HD Number of Counterpart meta.number;src.redshift double nullable me_count_rate_error ME Count Rate Error ct/s stat.error;phot.count;em.X-ray.soft double nullable processed_date Date of Buffer Creation mjd time.processing double nullable file_bglcurve File Name of Background Light Curve meta.id;instr.background;meta.file char nullable me_3_to_6_count_rate_err ME Count Rate Error in 3-6 keV Band ct/s stat.error;phot.count;em.X-ray.soft double nullable detection_significance Probability That Source Is Background Fluctuation stat.fit.goodness;instr.background double nullable id_number Source Order Number meta.id short nullable expected_variance_ta1 Expected Variance in TA1 stat.variance double nullable old_deadtime Dead Time Correction arith.factor;time.epoch short nullable res_of_lc Bin Width in Rate Buffer s arith.rate double nullable diamond_filter OBC Configuration phys.atmol.configuration;instr.setup short nullable rosat_id ROSAT ID meta.id short nullable background_per_sqpix Background Level ct/square_pixel instr.background;phys.atmol.level double nullable al_count_rate_error Al/Par Count Rate Error ct/s stat.error;phot.count;em.X-ray.soft double nullable qflag_me ME Quality Flag meta.code short nullable file_image Compressed Image File Name meta.id;meta.file char nullable me_3_to_6_count_rate ME Count Rate in 3-6 keV Band ct/s phot.count;em.X-ray.medium double nullable ipc_count_rate_error IPC Count Rate Error ct/s stat.error;phot.count;em.X-ray.soft double nullable tape_no Archive Tape Number Where Files Are Stored meta.id short nullable file_lcurve File Name of Light Curve meta.id;meta.file char nullable me_1_to_3_count_rate_err ME Count Rate Error in 1-3keV Band ct/s stat.error;phot.count;em.X-ray.soft double nullable ub_color U-B Color phot.color;em.opt.U;em.opt.B double nullable proposal_type Proposal Type (HLX etc.) meta.note char nullable observed_variance_ta2 Observed Variance in TA2 stat.variance double nullable al_count_rate Al/Par Count Rate ct/s phot.count;em.X-ray.soft double nullable lightcurve_prefix Rates Buffer Identifier (First Letter) meta.id char nullable