1 files changed, 28 insertions, 0 deletions
diff --git a/noao/onedspec/splot/confnu.x b/noao/onedspec/splot/confnu.x
new file mode 100644
index 00000000..228cea6f
--- /dev/null
+++ b/noao/onedspec/splot/confnu.x
@@ -0,0 +1,28 @@
+include	<error.h>
+include	<smw.h>
+
+define	VLIGHT		2.997925e18
+
+# CONFNU -- Convert to FNU from FLAMBDA
+
+procedure confnu (sh)
+
+pointer	sh			# SHDR pointer
+
+int	i
+real	lambda
+pointer	ang, un_open()
+errchk	un_open, un_ctranr
+
+begin
+	ang = un_open ("angstroms")
+	iferr {
+	    do i = 0, SN(sh)-1 {
+		call un_ctranr (UN(sh), ang, Memr[SX(sh)+i], lambda, 1)
+		Memr[SY(sh)+i] = Memr[SY(sh)+i] * lambda**2 / VLIGHT
+	    }
+	} then
+	    call erract (EA_WARN)
+
+	call un_close (ang)
+end