IC348CXO ivo://nasa.heasarc/ic348cxo NASA/GSFC HEASARC Preibisch, Zinnecker 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The authors have obtained a deep (53 ks) X-ray image of the very young stellar cluster IC 348 with the Advanced CCD Imaging Spectrometer on board the Chandra X-Ray Observatory. In this image with a sensitivity limit of ~ 1 x 10<sup>28</sup> ergs/s (more than 10 times deeper than their ROSAT images of IC 348), 215 X-ray sources were detected. While 115 of these sources can be identified with known cluster members, 58 X-ray sources are most likely new, still unidentified cluster members. About 80% of all known cluster members with masses between ~0.15 and 2 solar masses are visible as X-ray sources in the ACIS image. X-ray emission at levels of ~10<sup>28</sup> ergs/s was discovered from four of 13 known brown dwarfs and from three of 12 brown dwarf candidates in IC 348. X-ray emission was also detected from two deeply embedded objects, presumably class I protostars, south of the cluster center. Optical and infrared counterparts have been identified for most of the X-ray sources. Some 40 X-ray sources do not have optical or IR counterparts, and are most likely background (probably extragalactic) objects. This number is consistent with the expected number of extragalactic background X-ray sources based on the observed log N - log S statistics from the deep X-ray counts in the Chandra Deep Field South. This table was created by the HEASARC in January 2007 based on the merger of CDS table J/AJ/122/866/table1.dat (Table 1 from Preibisch and Zinnecker 2001) with the electronic AJ table version of Table 1 from Preibisch and Zinnecker 2002. This is a service provided by NASA HEASARC . 2002AJ....123.1613P https://heasarc.gsfc.nasa.gov/W3Browse/all/ic348cxo.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=ic348cxo& GET text/xml 180 99999 true 56.08254167 31.98836111 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=ic348cxo GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_ic348cxo&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CHANDRA 0.0166666666666667 X-ray Optical public ic348cxo IC 348 Chandra X-Ray Point Source Catalog name 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 spect_type Spectral Type src.spType char nullable count_rate Count Rate ct/s phot.count;em.X-ray double nullable count_rate_error Error in Count Rate ct/s stat.error;phot.count;em.X-ray double nullable lx Extinction-Corrected, 0.2-10keV-band X-Ray Luminosity (erg/s) erg/s double nullable lx_error Uncertainty in X-Ray Luminosity erg/s 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 av_flag Extinction Flag: i=Estimated from Near-Infrared Colors, :=3.5 mag Assumed char nullable dec_error Declination Positional Uncertainty arcsec stat.error;pos.eq.dec;meta.main double nullable ra_error Right Ascension Positional Uncertainty arcsec stat.error;pos.eq.ra;meta.main double nullable kt_plasma Plasma Temperature (keV) keV float nullable alt_name Alternative Source Designation meta.id char nullable kt_plasma_error Uncertainty in Plasma Temperature (keV) keV float nullable optical_ir_id Optical/IR Source Identification char nullable lii Galactic Longitude degree pos.galactic.lon double nullable class Browse Object Classification src.class short nullable av Visual Extinction of the Counterpart mag float nullable bii Galactic Latitude degree pos.galactic.lat double nullable ew_halpha H{alpha} Emission Line Equivalent Width (Angstrom) Angstrom float nullable source_number Sequential Identification Number for Each Source in Catalog meta.id short nullable