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J/ApJ/999/244
-1
X-ray catalog and classification of 4FGL-DR4 UGSs (Neumann+ 2026)
ReadMe+ftp
2026ApJ...999..244N
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1.
J/ApJ/999/244/table2
Swift X-Ray sources with extreme photon indices, alpha
X
<0 or alpha
X
>4, included in the main analysis
(17 rows)
meta
J/ApJ/999/244/table2
Simple Constraint
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Constraints
applied on Columns
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Column
Constraint
Explain
(
UCD
)
recno
Record number assigned by the VizieR team. Should Not be used for identification.
(
meta.record
)
(
RECORD
)
4FGL
(char)
4FGL designation, JHHMM.m+DDMMa
(
meta.id;meta.main
)
(
ID_MAIN
)
n_4FGL
(char)
[*] * indicates 4FGL sources with multiple X-ray sources
(
meta.note
)
(
NOTE
)
SwXF4-DR4
(char)
SwXF4-DR4 designation, JHHMMSS.s+DDMMSS
(
meta.id
)
(
ID_ALTERNATIVE
)
nH
10+22cm-2
Hydrogen column density obtained with the nH function
(
phys.columnDensity
)
(
PHYS_COLUMN_DENSITY
)
alphaX
Photon index
(Note 1)
(
stat.fit.param
)
(
PHYS_ENERGY_INDEX
)
e_alphaX
(n)
Photon index error
(Note 1)
(
stat.error
)
(
ERROR
)
Ctp
(char)
Possible Counterpart
(Note 2)
(
meta.id.assoc
)
(
ID_ASSOCIATED
)
ALL
cols
(n)
indicates a possible blank or NULL column
(i)
indexed column
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