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VII/43 Wisconsin Soft X-Ray Diffuse Backgr All-Sky Surv (McCammon+ 1983)
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Wisconsin Soft X-Ray Diffuse Background All-Sky Survey
McCammon D., Burrows D.N., Sanders W.T., Kraushaar W.L.
<ApJ, 269, 107 (1983)>
=1983ApJ...269..107M
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ADC_Keywords: Surveys ; X-ray sources
Description:
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.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
doc_gen.doc 80 296 General documentation for the survey
doc_rate.doc 80 186 Documentation for the countrate files (p*.dat)
programs.doc 80 547 FORTRAN subroutines for accessing the original
data files
a0b.fit 2880 48 Aitoff, centered on Galactic center (0 deg),
B band
a0b_mask.fit 2880 48 Aitoff 0 B band (with contaminated regions
defined by the subroutine REMOVE in
programs.doc zeroed)
a0c.fit 2880 48 Aitoff 0 C band
a0c_mask.fit 2880 48 Aitoff 0 C band (with contaminated regions
defined by the subroutine REMOVE in
programs.doc zeroed)
a0m.fit 2880 48 Aitoff, centered on Galactic center, M band
a0m1.fit 2880 48 Aitoff 0 M1 band
a0m2.fit 2880 48 Aitoff 0 M2 band
a0i.fit 2880 48 Aitoff 0 I band
a0j.fit 2880 48 Aitoff 0 J band
a026.fit 2880 48 Aitoff 0 2-6 keV band
a180b.fit 2880 48 Aitoff, centered on anticenter (180 deg),
B band
a180c.fit 2880 48 Aitoff 180 C band
a180m.fit 2880 48 Aitoff 180 deg M band
a180m1.fit 2880 48 Aitoff 180 deg M1 band
a180m2.fit 2880 48 Aitoff 180 deg M2 band
a180i.fit 2880 48 Aitoff 180 deg I band
galxy0.fit 2880 48 Aitoff 0 deg mapping of (l,b) to pixels
galxy180.fit 2880 48 Aitoff 180 deg mapping of (l,b) to pixels
xygal0.fit 2880 48 Aitoff 0 deg mapping of pixels to (l,b)
xygal180.fit 2880 48 Aitoff 180 deg mapping of pixels to (l,b)
npb.fit 2880 25 North Polar B band
npc.fit 2880 25 North Polar C band
npm.fit 2880 25 North Polar M band
npm1.fit 2880 25 North Polar M1 band
npm2.fit 2880 25 North Polar M2 band
npi.fit 2880 25 North Polar I band
spb.fit 2880 25 South Polar B band
spc.fit 2880 25 South Polar C band
spm.fit 2880 25 South Polar M band
spm1.fit 2880 25 South Polar M1 band
spm2.fit 2880 25 South Polar M2 band
spi.fit 2880 25 South Polar I band
galxy_np.fit 2880 25 Zenithal Equal Area mapping of (l,b) to
pixels for North Polar projection
galxy_sp.fit 2880 25 Zenithal Equal Area mapping of (l,b) to
pixels for South Polar projection
xygal_np.fit 2880 25 Zenithal Equal Area mapping of pixels to
(l,b) for North Polar projection
xygal_np.fit 2880 25 Zenithal Equal Area mapping of pixels to
(l,b) for South Polar projection
effaprod.dat 2880 561 Effective Area Product as a function of energy
for the different X-ray bands
p13049.dat 400 1176 Flight 13.049 (PASS3)
p13083.dat 400 1186 Flight 13.083 (PASS3)
p13084.dat 400 1356 Flight 13.084 (PASS3)
p13102.dat 400 1211 Flight 13.102 (PASS3)
p13103.dat 400 1026 Flight 13.103 (PASS3)
p13122.dat 400 1296 Flight 13.122 (PASS3)
p13137.dat 400 1326 Flight 13.137 (PASS3)
p25045.dat 400 1401 Flight 25.045 (PASS3)
p25051.dat 400 1451 Flight 25.051 (PASS3)
p26061.dat 400 1245 Flight 26.061 (PASS3)
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Byte-by-byte Description of file: effaprod.dat
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Bytes Format Units Label Explanations
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2- 10 E9.3 keV Energy Photon energy
12- 20 E9.3 cm^2sr Area_B Effective area in the B band
22- 30 E9.3 cm^2sr Area_C Effective area in the C band
32- 40 E9.3 cm^2sr Area_M1 Effective area in the M1 band
42- 50 E9.3 cm^2sr Area_M2 Effective area in the M2 band
52- 60 E9.3 cm^2sr Area_I Effective area in the I band
62- 70 E9.3 cm^2sr Area_J Effective area in the J band
72- 80 E9.3 cm^2sr Area_26 Effective area in the 2-6 keV band
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Byte-by-byte Description of file: p13049.dat, p13083.dat, p13084.dat
Byte-by-byte Description of file: p13102.dat, p13103.dat, p13122.dat
Byte-by-byte Description of file: p13137.dat, p25045.dat, p25051.dat, p26061.dat
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Bytes Format Units Label Explanations
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5- 10 F6.3 --- Flight Flight number
19- 20 I2 min Minutes Minutes past the hour for the center of the
0.2 s observation
26- 30 F5.2 s Seconds Seconds past the minute for the center of
the 0.2 s observation
35- 40 A6 --- Flag *Flag word
41- 50 E10.3 deg GLON Galactic longitude
51- 60 E10.3 deg GLAT Galactic latitude
61- 70 E10.3 deg RA Right Ascension (B1950)
71- 80 E10.3 deg Dec Declination (B1950)
81- 90 E10.3 deg Azimuth Azimuth angle
91-100 E10.3 deg Zenith Zenith angle
101-110 E10.3 km Altitude Rocket altitude
111-120 E10.3 cm^-2 N_column *Column density of nitrogen atoms along the
line of sight in the atmosphere
121-130 E10.3 cm^-2 O_column *Column density of oxygen atoms along the
line of sight in the atmosphere
131-140 E10.3 cm^-2 Ar_column *Column density of argon atoms along the
line of sight in the atmosphere
141-150 E10.3 deg B_azimuth Azimuth angle, relative to the Earth's
magnetic field
151-160 E10.3 deg B_zenith Zenith angle, relative to the Earth's
magnetic field
161-170 E10.3 s^-1 Rate_B Count rate in band B for this obs.
171-180 E10.3 s^-1 Sigma_B One sigma uncertainty for Rate_B
181-190 E10.3 --- Trans_B Atmospheric transmission for band B
191-200 E10.3 s^-1 Rate_C Count rate in band C for this obs.
201-210 E10.3 s^-1 Sigma_C One sigma uncertainty for Rate_C
211-220 E10.3 --- Trans_C Atmospheric transmission for band C
221-230 E10.3 s^-1 Rate_M Mount rate in band M for this obs.
231-240 E10.3 s^-1 Sigma_M One sigma uncertainty for Rate_M
241-250 E10.3 --- Trans_M Atmospheric transmission for band M
251-260 E10.3 s^-1 Rate_M1 Count rate in band M1 for this obs.
261-270 E10.3 s^-1 Sigma_M1 One sigma uncertainty for Rate_M1
271-280 E10.3 --- Trans_M1 Atmospheric transmission for band M1
281-290 E10.3 s^-1 Rate_M2 Count rate in band M2 for this obs.
291-300 E10.3 s^-1 Sigma_M2 One sigma uncertainty for Rate_M2
301-310 E10.3 --- Trans_M2 Atmospheric transmission for band M2
311-320 E10.3 s^-1 Rate_I Count rate in band I for this obs.
321-330 E10.3 s^-1 Sigma_I One sigma uncertainty for Rate_I
331-340 E10.3 --- Trans_I Atmospheric transmission for band I
341-350 E10.3 s^-1 Rate_J Count rate in band J for this obs.
351-360 E10.3 s^-1 Sigma_J One sigma uncertainty for Rate_J
361-370 E10.3 --- Trans_J Atmospheric transmission for band J
371-380 E10.3 s^-1 Rate_26 Count rate in band 2-6 keV for this obs.
381-390 E10.3 s^-1 Sigma_26 One sigma uncertainty for Rate_26
391-400 E10.3 --- Trans_26 Atmospheric transmission for band 2-6 keV
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Note on Flag:
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
Note on N_column:
This equals twice the number of nitrogen molecules per cm^2 - calculated
from CIRA72 model atmosphere, as described in McCammon et al.
Note on O_column:
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).
Note on Ar_column:
Calculated from CIRA72 model atmosphere, as described in McCammon
et al. (1983).
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(End) Seth W. Digel and Gail L. Schneider [SSDOO/ADC] 9-Oct-1997