7043 VII/43 Wisconsin Soft X-Ray Diffuse Backgr All-Sky Surv D McCammon D N Burrows W T Sanders W L Kraushaar ApJ 269 107 1983 1983ApJ...269..107M Surveys X-ray sources The catalog contains all-sky survey of the soft X-ray diffuse background and the count-rate data from which the maps were made for the ten flights included in the survey. It contains 40 files in the machine-readable version and includes documentation and utility subroutines. The data files contain different band maps (B, C, M, M1, M2, I, J, 2-6 keV) in a 0 degree-centered Aitoff projection, in a 180-degree-centered Aitoff projection, in a north polar projection, and in a south polar projection. Lookup tables in the form of FITS images are provided for conversion between pixel coordinates and Galactic coordinates for the various projections.

Energy Photon energy keV Area_B Effective area in the B band cm^2sr Area_C Effective area in the C band cm^2sr Area_M1 Effective area in the M1 band cm^2sr Area_M2 Effective area in the M2 band cm^2sr Area_I Effective area in the I band cm^2sr Area_J Effective area in the J band cm^2sr Area_26 Effective area in the 2-6 keV band cm^2sr Flight Flight number --- Minutes Minutes past the hour for the center of the 0.2 s observation min Seconds Seconds past the minute for the center of the 0.2 s observation s Flag Flag word These 6 characters should be interpreted as an 18-bit octal word, with only the least significant (rightmost) 16 bits being used. They contain the following information (bits numbered 1-16 from left to right - most significant to least significant): 1: set to 1 if the observation contains bad telemetry. 2: set to 1 if there are fewer than 50 useful telemetry subframes in the observation (each observation can contain a maximum of 125 subframes for flights 13.083 and 13.102, or 250 for the other flights). 3: set to 1 if the livetime correction is uncertain. 5: set to 1 if the B and/or C band data are definitely contaminated. 6: set to 1 if the B and/or C band data are possibly contaminated. 10: set to 1 if the payload was pointed at the Earth. 11: set to 1 if a B and/or C band source was in the field of view. These are: HZ43, Am Her, the Cygnus Loop, Vela-Puppis SNR's, Sco X-1, and U Gem. 12: set to 1 if the M and/or I band data show evidence for the presence of a source in the field of view. 13: set to 1 if the J and/or 2-6 band data show evidence for the presence of a source in the field of view. 14: set to 1 if the following sources are in the field of view: Sources listed in the 4-th Uhuru catalog with >= 20 4U cps. Vela-Puppis SNR's. Cygnus Loop. Example: The flag word of the first record of file 31 (13.083) is written as: 004000, indicating that bit 5 is set because the B and C band data for that observation are known to be contaminated. Note that records were not cast onto the maps presented in McCammon et al. (1983) if the following flags were set: For the B and C bands: 1, 2, 3, 5, 10, 11 For the M1 through 2-6 bands: 1, 2, 3, 10, 14 --- GLON Galactic longitude deg GLAT Galactic latitude deg RA Right Ascension (B1950) deg Dec Declination (B1950) deg Azimuth Azimuth angle deg Zenith Zenith angle deg Altitude Rocket altitude km N_column Column density of nitrogen atoms along the line of sight in the atmosphere This equals twice the number of nitrogen molecules per cm^2 - calculated from CIRA72 model atmosphere, as described in McCammon et al. cm^-2 O_column Column density of oxygen atoms along the line of sight in the atmosphere This equals twice the number of oxygen molecules plus the number of oxygen atoms per cm^2 - calculated from CIRA72 model atmosphere, as described in McCammon et al. (1983). cm^-2 Ar_column Column density of argon atoms along the line of sight in the atmosphere Calculated from CIRA72 model atmosphere, as described in McCammon et al. (1983). cm^-2 B_azimuth Azimuth angle, relative to the Earth's magnetic field deg B_zenith Zenith angle, relative to the Earth's magnetic field deg Rate_B Count rate in band B for this obs. s^-1 Sigma_B One sigma uncertainty for Rate_B s^-1 Trans_B Atmospheric transmission for band B --- Rate_C Count rate in band C for this obs. s^-1 Sigma_C One sigma uncertainty for Rate_C s^-1 Trans_C Atmospheric transmission for band C --- Rate_M Mount rate in band M for this obs. s^-1 Sigma_M One sigma uncertainty for Rate_M s^-1 Trans_M Atmospheric transmission for band M --- Rate_M1 Count rate in band M1 for this obs. s^-1 Sigma_M1 One sigma uncertainty for Rate_M1 s^-1 Trans_M1 Atmospheric transmission for band M1 --- Rate_M2 Count rate in band M2 for this obs. s^-1 Sigma_M2 One sigma uncertainty for Rate_M2 s^-1 Trans_M2 Atmospheric transmission for band M2 --- Rate_I Count rate in band I for this obs. s^-1 Sigma_I One sigma uncertainty for Rate_I s^-1 Trans_I Atmospheric transmission for band I --- Rate_J Count rate in band J for this obs. s^-1 Sigma_J One sigma uncertainty for Rate_J s^-1 Trans_J Atmospheric transmission for band J --- Rate_26 Count rate in band 2-6 keV for this obs. s^-1 Sigma_26 One sigma uncertainty for Rate_26 s^-1 Trans_26 Atmospheric transmission for band 2-6 keV --- doc_gen.docGeneral documentation for the survey doc_rate.docDocumentation for the countrate files (p*.dat) programs.docFORTRAN subroutines for accessing the original data files a0b.fitAitoff, centered on Galactic center (0 deg), B band a0b_mask.fitAitoff 0 B band (with contaminated regions defined by the subroutine REMOVE in programs.doc zeroed) a0c.fitAitoff 0 C band a0c_mask.fitAitoff 0 C band (with contaminated regions defined by the subroutine REMOVE in programs.doc zeroed) a0m.fitAitoff, centered on Galactic center, M band a0m1.fitAitoff 0 M1 band a0m2.fitAitoff 0 M2 band a0i.fitAitoff 0 I band a0j.fitAitoff 0 J band a026.fitAitoff 0 2-6 keV band a180b.fitAitoff, centered on anticenter (180 deg), B band a180c.fitAitoff 180 C band a180m.fitAitoff 180 deg M band a180m1.fitAitoff 180 deg M1 band a180m2.fitAitoff 180 deg M2 band a180i.fitAitoff 180 deg I band galxy0.fitAitoff 0 deg mapping of (l,b) to pixels galxy180.fitAitoff 180 deg mapping of (l,b) to pixels xygal0.fitAitoff 0 deg mapping of pixels to (l,b) xygal180.fitAitoff 180 deg mapping of pixels to (l,b) npb.fitNorth Polar B band npc.fitNorth Polar C band npm.fitNorth Polar M band npm1.fitNorth Polar M1 band npm2.fitNorth Polar M2 band npi.fitNorth Polar I band spb.fitSouth Polar B band spc.fitSouth Polar C band spm.fitSouth Polar M band spm1.fitSouth Polar M1 band spm2.fitSouth Polar M2 band spi.fitSouth Polar I band galxy_np.fitZenithal Equal Area mapping of (l,b) to pixels for North Polar projection galxy_sp.fitZenithal Equal Area mapping of (l,b) to pixels for South Polar projection xygal_np.fitZenithal Equal Area mapping of pixels to (l,b) for North Polar projection xygal_np.fitZenithal Equal Area mapping of pixels to (l,b) for South Polar projection Seth W. Digel and Gail L. Schneider SSDOO/ADC 1997Oct09 VII_43.xml