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 Database: CYGOB2CXO
   Cygnus OB2 Association Chandra X-Ray Point Source Catalog
Database Index | Basic Search | Advanced Search
 Name Resolver
Name:

 Search Co-ordinates
Co-ords:

Co-ordinate system:
Equatorial Ecliptic Galactic
Equinox: 1950 2000

 Search Type
Cone search, radius: arcmin.
Square search, width: arcmin.
Rectangle search, size: arcmin
 Output Options
 Output coordinates in:
Decimal  Sexagesimal
 Output system:
Equatorial   Ecliptic   Galactic
 Output epoch:
J2000   B1950
 Output format:
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Definition
 
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<- Sort by distance from search centre (default)
 SOURCE_NUMBER 
Sequential Identification Number for Each X-Ray Source in Catalog
 ALT_NAME 
Alternative Source Designation Based on Catalog Source Number
 NAME 
Source Designation (CXOCyg JHHMMSS.ss+DDMMSS.s)
 RA 
Right Ascension
 DECL 
Declination
 LII 
Galactic Longitude
 BII 
Galactic Latitude
 ERROR_RADIUS 
RMS Uncertainty on Position (arcsec)
 OFF_AXIS 
Off-Axis Angle (arcmin)
 SNR 
Significance of Detection
 EXTRACTION_AREA 
Source Extraction Area (pixels)
 PSF_FRACTION 
PSF Fraction of Source Events within the Extraction Area Assuming E=1.49keV
 COUNTS 
Background-Corrected Extracted Source Counts in the 0.5-8.0keV Band (ct/photon)
 EXPOSURE 
Exposure Time (s)
 COUNT_RATE 
Total (0.5-8.0keV) Band Count Rate (ct/s)
 SB_COUNT_RATE 
Soft (0.5-1.7keV) Band Count Rate (ct/s)
 MB_COUNT_RATE 
Medium (1.7-2.8keV) Band Count Rate (ct/s)
 HB_COUNT_RATE 
Hard (2.8-8.0keV) Band Count Rate (ct/s)
 MEDIAN_ENERGY 
Median Photon Energy (keV)
 LOG_PROB_CONSTANT 
Logarithm of the KS-Test Significance log(P_KS_)
 FLARE_FLAG 
Flag [F] Indicates Flare-Like Sources
 TWOMASS_NAME 
2MASS Source Designation (2MASS JHHMMSSss+DDMMSSs)
 CXO_2MASS_OFFSET 
Offset between Chandra and 2MASS Sources (arcsec)
 JMAG 
2MASS J Magnitude
 JMAG_ERROR 
RMS Uncertainty on J Magnitude
 HMAG 
2MASS H Magnitude
 HMAG_ERROR 
RMS Uncertainty on H Magnitude
 KS_MAG 
2MASS Ks Magnitude
 KS_MAG_ERROR 
RMS Uncertainty on Ks Magnitude
 JMAG_FLAG 
J Band Photometric Quality Flag
 HMAG_FLAG 
H Band Photometric Quality Flag
 KS_MAG_FLAG 
Ks Band Photometric Quality Flag
 VMAG_EXTINCTION 
Absorption in V Band
 VMAG_EXTINCTION_FLAG 
Flag [U] Indicates Stars with Unconstrained AV
 FIT_LOG_NH 
Logarithm of Best Fit Hydrogen Column Density (in cm^-2)
 FIT_LOG_NH_ERROR 
RMS Uncertainty on log(NH)
 FIT_APEC_KT 
Plasma Temperature (keV)
 FIT_APEC_KT_ERROR 
RMS Uncertainty on Plasma Temperature (keV)
 FIT_LOG_EM 
Logarithm of Emission Measure (in cm^-3)
 FIT_REDUCED_CHI2 
Reduced Chi^2 Value for the Spectral Fit
 FIT_DOF 
Degree of Freedom for the Spectral Fit

 Output number of lines:  
If you have any problems, please consult the help page or mail ledas-help@star.le.ac.uk
 
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