ROSETTECXO ivo://nasa.heasarc/rosettecxo NASA/GSFC HEASARC Wang et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The authors of this study have explored the young stellar populations in the Rosette Molecular Cloud (RMC) region with high spatial resolution X-ray images from the Chandra X-ray Observatory, which are effective in locating weak-lined T Tauri stars as well as disk-bearing young stars. A total of 395 X-ray point sources are detected, 299 of which (76%) have an optical or near-infrared (NIR) counterpart identified from deep FLAMINGOS images. From X-ray and mass sensitivity limits, the authors infer a total population of ~1700 young stars in the survey region. Based on smoothed stellar surface density maps, they investigate the spatial distribution of the X-ray sources and define three distinctive structures and substructures within them. Structures B and C are associated with previously known embedded IR clusters, while structure A is a new X-ray-identified unobscured cluster. A high-mass protostar RMCX 89 = IRAS 06306+0437 and its associated sparse cluster are studied. The different subregions are not coeval but do not show a simple spatial-age pattern. Disk fractions vary between subregions and are generally <~ 20% of the total stellar population inferred from the X-ray survey. The data are consistent with speculations that triggered star formation around the H II region is present in the RMC, but do not support a simple sequential triggering process through the cloud interior. While a significant fraction of young stars are located in a distributed population throughout the RMC region, it is not clear if they originated in clustered environments. This HEASARC table contains the 348 primary sources listed in Table 1 of the reference paper, as well as the 47 tentative sources listed in Table 2 (the latter having a likelihood > 10<sup>-3</sup> of being a spurious background fluctuation based on Poisson statistics), to make a total of 395 X-ray sources. The information on optical and infrared counterparts to these X-ray sources which was provided in Table 4 of the reference paper has also been included herein. In order to allow users to clearly identify these 2 samples, the HEASARC has created a parameter source_sample which is set to 'P' for the Table 1 primary sources and to 'T' for the Table 2 tentative sources. This HEASARC table also contains the X-ray spectroscopic information derived for 158 sources which have photometric significance (the snr parameter) >= 2.0 which was presented in Table 3 of the reference paper. All spectral fits used the "wabs(apec)" model in XSPEC and assumed 0.3 * Z_Sun abundances. The quoted emission measures and X-ray luminosities assume a distance to the Rosette molecular cloud of 1.4 kpc. This table was created by the HEASARC in July 2009 based on the merger of electronic versions of tables 1, 2, 3 and 4 from the above reference which were obtained from the ApJ web site. This is a service provided by NASA HEASARC . 2009ApJ...696...47W https://heasarc.gsfc.nasa.gov/W3Browse/all/rosettecxo.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=rosettecxo& GET text/xml 180 99999 true 98.634079 4.297474 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=rosettecxo GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_rosettecxo&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CHANDRA 0.0166666666666667 X-ray public rosettecxo Rosette Molecular Cloud Chandra X-Ray Point Source Catalog name IAU-Style Source Designation meta.id;meta.main char nullable alt_name Alternative Catalog-Based Source Designation meta.id char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable counts Estimated Net 0.5-8keV Extracted Counts ct phot;em.X-ray double nullable counts_error Average Poisson Upper and Lower 1-Sigma Error in Net Counts ct stat.error;phot;em.X-ray double nullable log_lx Logarithm of Absorption-Corrected 2-8keV Band Luminosity log(erg/s) phys.luminosity;em.X-ray double nullable log_hb_lx Logarithm of Absorption-Corrected 2-8keV Band Luminosity log(erg/s) phys.luminosity;em.X-ray.medium double 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 apec_kt_flag Flag [i] Indicates kT Frozen in the Spectral Fitting meta.code;phys.temperature char nullable snr Photometric Significance stat.snr;em.X-ray double nullable twomass_name 2MASS Source Identification meta.id.cross char nullable hb_counts Estimated Net 2-8keV Extracted Counts ct phot;em.X-ray.medium double nullable source_number Sequential Identification Number for Each Source in Catalog meta.id;src short nullable irac_3p6um_ctrprt_flag Spitzer/IRAC 3.6-micron Flag meta.code;src char nullable bmag B Band Magnitude mag phot.mag;em.opt.B double nullable log_lx_obs Logarithm of 0.5-8keV Band Luminosity log(erg/s) phys.luminosity;em.X-ray double nullable twomass_flags 2MASS Flags meta.code.qual;phot char nullable off_axis Off-Axis Angle (arcmin) arcmin instr.offset double nullable bii Galactic Latitude degree pos.galactic.lat double nullable bck_counts Background 0.5-8keV Extracted Counts ct phot;instr.background;em.X-ray double nullable source_notes Additional Notes Concerning Source meta.note;src char nullable log_nh Logarithm of Best-Fit Column Density log(cm^-2) phys.columnDensity double nullable source_sample Flag [PT] Indicates Published Table/Sample from Which Entry Originates meta.ref;meta.table char nullable log_em Logarithm of Emission Measure of Model Spectrum log(cm^-3) phys.emissMeasure double nullable kmag 2MASS K_S Band Magnitude mag phot.mag;em.IR.K double nullable log_bck_prob_limit Limit Flag for Logarithm of Background Probability meta.code;stat.probability char nullable source_variable_flag Flag [abc] Indicates Variability Characterization Based on K-S Statistic meta.code;src.var char nullable lii Galactic Longitude degree pos.galactic.lon double nullable rmag R Band Magnitude mag phot.mag;em.opt.R double nullable psf_fraction PSF Fraction Enclosed in Extraction Region instr.det.psf double nullable log_em_pos_err Upper 90%-Confidence Interval in log_EM log(cm^-3) stat.error;phys.emissMeasure double nullable source_flag Flag [C] Indicates Above Photon Flux Completeness Limit for All RMCX Detections meta.code char nullable jmag 2MASS J Band Magnitude mag phot.mag;em.IR.J double nullable log_em_neg_err Lower 90%-Confidence Interval in log_EM log(cm^-3) stat.error;phys.emissMeasure double nullable log_bck_prob Logarithm of Probability That Extracted 0.5-8keV Counts from Background stat.probability double nullable log_sb_lx_obs Logarithm of 0.5-2keV Band Luminosity log(erg/s) phys.luminosity;em.X-ray.soft double nullable error_radius Estimated 1-Sigma Random Position Error (arcsec) arcsec stat.error;pos double nullable usno_name USNO B1.0 Source Designation meta.id.cross char nullable log_nh_flag Flag [i] Indicates log_NH Frozen in the Spectral Fitting meta.code;phys.columnDensity char nullable log_nh_neg_err Lower 90%-Confidence Interval in log_NH log(cm^-2) stat.error;phys.columnDensity double nullable apec_kt_pos_err Upper 90%-Confidence Interval in kT keV stat.error;phys.temperature double nullable median_energy Background-Corrected 0.5-8keV Median Photon Energy (keV) keV phys.energy double nullable apec_kt_neg_err Lower 90%-Confidence Interval in kT keV stat.error;phys.temperature double nullable flamingos_id FLAMINGOS Source Identification meta.id.cross char nullable log_hb_lx_obs Logarithm of 2-8keV Band Luminosity log(erg/s) phys.luminosity;em.X-ray.medium double nullable log_nh_pos_err Upper 90%-Confidence Interval in log_NH log(cm^-2) stat.error;phys.columnDensity double nullable imag I Band Magnitude mag phot.mag;em.opt.I double nullable source_anomaly_flag Flag [g] Indicates Source Anomaly meta.code char nullable exposure Effective Exposure Time (s) s time.duration;obs.exposure double nullable apec_kt Best-Fit Plasma Temperature (keV) keV phys.temperature double nullable hmag 2MASS H Band Magnitude mag phot.mag;em.IR.H double nullable