A wide range of parameters are used in the ClassX system. This table provides descriptions of the parameters used in the classifiers to date. The names used below are those used within the ClassX pipeline, and multiple names exist for some parameters.
| Name | Source | Data type | Notes |
|---|---|---|---|
| 2MASS_HMAG | 2MASS | Infrared magnitude | |
| 2MASS_JMAG | 2MASS | Infrared magnitude | |
| 2MASS_KMAG | 2MASS | Infrared magnitude | |
| GSC2_BLUE_MAG | GSC 2.2 | Optical magnitude | |
| GSC2_CLASS | GSC 2.2 | Optical class code | |
| NVSS_COUNTERPART_FLAG | NVSS | Radio counterpart existence flag | Set to 1 if found, 0 if no coverage, -1 if not found. |
| NVSS_MAG_1_4_GHZ_LIM5 | NVSS | Radio magnitude | Magnitude = -2.512 ln(flux), or set to 5 if not computable. |
| NVSS_MAJOR_AXIS_LIM0 | NVSS | Radio extent | Set to -1 (NOT 0) if not available. |
| NVSS_MINOR_AXIS_LIM0 | NVSS | Radio extent | Set to -1 (NOT 0) if not available. |
| RADIO_COUNTERPART_FLAG | NVSS+SUMSS | Radio counterpart existence flag | Set to 1 if counterpart found in NVSS or SUMSS, else 0. |
| RASS_HR1 | RASSBSC and/or RASSFSC, or WGACAT | Hardness ratio | Converted (if needed) using linear energy distribution. |
| RASS_HR2 | RASSBSC and/or RASSFSC, or WGACAT | Hardness ratio | Converted (if needed) using linear energy distribution. |
| RASS_MX | WGACAT | X-ray magnitude | Converted using linear energy distribution. |
| RASS_MX_TOTAL | RASSBSC and/or RASSFSC | X-ray magnitude | Magnitude = -2.512 log10(total_count_rate) = -1.090947 ln(total_count_rate) |
| RASS_SOURCE_EXTENT | RASSBSC and/or RASSFSC | X-ray extent | In arcseconds. Always has the value 0 or higher. |
| RASSBSC_HR1 | RASSBSC | Hardness ratio | |
| RASSBSC_HR2 | RASSBSC | Hardness ratio | |
| RASSBSC_MX_TOTAL | RASSBSC | X-ray magnitude | Magnitude = -2.512 log10(total_count_rate) = -1.090947 ln(total_count_rate) |
| RASSBSC_MX1_12 | RASSBSC | X-ray magnitude | WGACAT-format; magnitude = -2.512 log10(low_band_count_rate) = -1.090947 ln(low_band_count_rate), or set to 12 if not computable. |
| RASSBSC_MX2_13 | RASSBSC | X-ray magnitude | WGACAT-format; magnitude = -2.512 log10(mid_band_count_rate) = -1.090947 ln(mid_band_count_rate), or set to 13 if not computable. |
| RASSBSC_MX3_10 | RASSBSC | X-ray magnitude | WGACAT-format; magnitude = -2.512 log10(high_band_count_rate) = -1.090947 ln(high_band_count_rate), or set to 10 if not computable. |
| RASSBSC_SOURCE_EXTENT | RASSBSC | X-ray extent | In arcseconds. Always has the value 0 or higher. |
| RASSFSC_HR1 | RASSFSC | Hardness ratio | |
| RASSFSC_HR2 | RASSFSC | Hardness ratio | |
| RASSFSC_MX1_12 | RASSFSC | X-ray magnitude | WGACAT-format; magnitude = -2.512 log10(low_band_count_rate) = -1.090947 ln(low_band_count_rate), or set to 12 if not computable. |
| RASSFSC_MX2_13 | RASSFSC | X-ray magnitude | WGACAT-format; magnitude = -2.512 log10(mid_band_count_rate) = -1.090947 ln(mid_band_count_rate), or set to 13 if not computable. |
| RASSFSC_MX3_10 | RASSFSC | X-ray magnitude | WGACAT-format; magnitude = -2.512 log10(high_band_count_rate) = -1.090947 ln(high_band_count_rate), or set to 10 if not computable. |
| RASSFSC_SOURCE_EXTENT | RASSFSC | X-ray extent | In arcseconds. Always has the value 0 or higher. |
| ROSPSPC_SOURCE_EXTENT_0 | ROSPSPC | X-ray extent | In arcseconds. Set to 0 if not found. |
| TARGET_BII | Target | Galactic latitude | In decimal degrees. Computed from equatorial coordinates. |
| TARGET_LII | Target | Galactic longitude | In decimal degrees. Computed from equatorial coordinates. |
| USNOB1_BLUE_2_MAGNITUDE | USNO B1.0 | Optical magnitude | From second magnitude set in USNO B1.0. |
| USNOB1_BLUE_2_MAG | USNO B1.0 | Optical magnitude | Synonym for USNOB1_BLUE_2_MAGNITUDE. |
| USNOB1_BMAG | USNO B1.0 | Optical magnitude | Synonym for USNOB1_BLUE_2_MAGNITUDE. |
| USNOB1_IR_N_MAG | USNO B1.0 | Optical magnitude | |
| USNOB1_RED_2_MAGNITUDE | USNO B1.0 | Optical magnitude | From second magnitude set in USNO B1.0. |
| USNOB1_RED_2_MAG | USNO B1.0 | Optical magnitude | Synonym for USNOB1_RED_2_MAGNITUDE. |
| USNOB1_RMAG | USNO B1.0 | Optical magnitude | Synonym for USNOB1_RED_2_MAGNITUDE. |
| WGACAT_HR | WGACAT | Hardness ratio | |
| WGACAT_HR_HARD | WGACAT | Hardness ratio | |
| WGACAT_SR | WGACAT | Softness ratio | |
| WGACAT_SR_HARD | WGACAT | Softness ratio | |
| WGACAT_MX1 | WGACAT | X-ray magnitude | magnitude = -2.512 log10(low_band_count_rate) = -1.090947 ln(low_band_count_rate), or set to 9999 if not computable. |
| WGACAT_MX2 | WGACAT | X-ray magnitude | magnitude = -2.512 log10(mid_band_count_rate) = -1.090947 ln(mid_band_count_rate), or set to 9999 if not computable. |
| WGACAT_MX3 | WGACAT | X-ray magnitude | magnitude = -2.512 log10(high_band_count_rate) = -1.090947 ln(high_band_count_rate), or set to 9999 if not computable. |
Date of last modification:
Monday, December 01, 2003
Responsible NASA official: Tom
McGlynn
Curator: Eric Winter