1 files changed, 28 insertions, 0 deletions
diff --git a/pkg/tbtables/fitsio/ftmkey.f b/pkg/tbtables/fitsio/ftmkey.f
new file mode 100644
index 00000000..b7d05c26
--- /dev/null
+++ b/pkg/tbtables/fitsio/ftmkey.f
@@ -0,0 +1,28 @@
+C--------------------------------------------------------------------------
+        subroutine ftmkey(ounit,keywrd,value,comm,status)
+
+C       modify an existing simple FITS keyword record with format:
+C            "KEYWORD = VALUE / COMMENT"
+C               VALUE is assumed to be 20 characters long
+C               COMMENT is assumed to be 47 characters long
+C
+C       ounit   i  fortran output unit number
+C       keywrd  c  keyword name    ( 8 characters, cols.  1- 8)
+C       value   c  keyword value   (20 characters, cols. 11-30)
+C       comm    c  keyword comment (47 characters, cols. 34-80)
+C       OUTPUT PARAMETERS:
+C       status  i  output error status (0 = ok)
+C
+C       written by Wm Pence, HEASARC/GSFC, June 1991
+
+        character*(*) keywrd,value,comm
+        integer ounit,status
+        character key*8, val*20, com*47
+
+        key=keywrd
+        val=value
+        com=comm
+
+C       overwrite the preceeding 80 characters to the output buffer:
+        call ftmodr(ounit,key//'= '//val//' / '//com,status)
+        end