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 Database: M81CXO2
   M 81 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:
Filter Search  
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Parameter
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Definition
 
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<- Sort by distance from search centre (default)
 SOURCE_NUMBER 
Sequential Identification Number for Each Source in Catalog
 ALT_NAME 
Alternative Catalog-Based Source Designation
 NAME 
Source Designation
 RA 
Right Ascension
 DECL 
Declination
 LII 
Galactic Longitude
 BII 
Galactic Latitude
 OFF_AXIS 
Average Off-Axis Angle
 RAW_FB_COUNTS 
Total Source Counts
 BCK_FB_COUNTS 
Total Background Counts
 SB_COUNTS 
Net Soft (0.5-1 keV) Counts
 SB_COUNTS_NEG_ERR 
Lower Uncertainty for Soft-Band Counts
 SB_COUNTS_POS_ERR 
Upper Uncertainty for Soft-Band Counts
 MB_COUNTS 
Net Medium (1-2 keV) Counts
 MB_COUNTS_NEG_ERR 
Lower Uncertainty for Medium-Band Counts
 MB_COUNTS_POS_ERR 
Upper Uncertainty for Medium-Band Counts
 HB_COUNTS 
Net Hard (2-8 keV) Counts
 HB_COUNTS_NEG_ERR 
Lower Uncertainty for Hard-Band Counts
 HB_COUNTS_POS_ERR 
Upper Uncertainty for Hard-Band Counts
 PSF_FRACTION 
Average PSF Fraction Enclosed by Extraction Region
 SOURCE_FLAG 
Flag OC Indicates Source Off-Chip NA Indicates Not Available
 VAR_STAT_1 
Variability Statistic 1
 VAR_OBSID_NUMS 
Two Observations Corresponding to Variability Statistic 1
 VAR_STAT_2 
Variability Statistic 2
 SPECTRAL_MODEL 
Model Type
 SPECTRAL_MODEL_FLAG 
Flag [ab] Indicates Note on Spectral Model
 SPECTRAL_SHAPE 
Photon Index or kT of Model
 SPECTRAL_SHAPE_NEG_ERR 
Lower Uncertainty for Spectral Shape
 SPECTRAL_SHAPE_POS_ERR 
Upper Uncertainty for Spectral Shape
 SPECTRAL_NORM 
Model Normalization
 SPECTRAL_NORM_NEG_ERR 
Lower Uncertainty for Model Normalization
 SPECTRAL_NORM_POS_ERR 
Upper Uncertainty for Model Normalization
 NH 
The H I Column Density
 NH_NEG_ERR 
Lower Uncertainty for NH
 NH_POS_ERR 
Upper Uncertainty for NH
 BEST_FIT_C_STAT 
Total Best-Fit C-Statistic
 BEST_FIT_DOF 
Degrees of Freedom of Best Fit
 LX 
The 0.5-8 keV Luminosity (erg/s)
 LX_NEG_ERR 
Lower Uncertainty for X-Ray Luminosity (erg/s)
 LX_POS_ERR 
Upper Uncertainty for X-Ray Luminosity (erg/s)
 COMMENTS 
Comments Concerning Source Extraction

 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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