From 1e39d3979ae12046f1af48fe9fecb47be41de195 Mon Sep 17 00:00:00 2001
From: Akio Taniguchi <taniguchi@a.phys.nagoya-u.ac.jp>
Date: Sun, 21 Jul 2024 23:59:37 +0000
Subject: [PATCH] #151 Fix data type of to_brightness function (input = output)

---
 demerge/merge/utils.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/demerge/merge/utils.py b/demerge/merge/utils.py
index 8f05f88..97c9191 100644
--- a/demerge/merge/utils.py
+++ b/demerge/merge/utils.py
@@ -307,6 +307,7 @@ def to_brightness(dfof: xr.DataArray, /) -> xr.DataArray:
             - T0 / fwd
             - (1 - fwd) / fwd * T_amb,
         )
+        .astype(dfof.dtype)
         .rename("Brightness")
         .assign_attrs(long_name="Brightness", units="K")
     )