From ae43b0c726e399d6f6426e8a14e51d00cbfcf95e Mon Sep 17 00:00:00 2001
From: Aaron LI <aly@aaronly.me>
Date: Tue, 11 Sep 2018 17:45:39 +0800
Subject: Add doc/create-image-expcorr; still a WIP

---
 doc/create-image-expcorr.md | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 doc/create-image-expcorr.md

diff --git a/doc/create-image-expcorr.md b/doc/create-image-expcorr.md
new file mode 100644
index 0000000..626a364
--- /dev/null
+++ b/doc/create-image-expcorr.md
@@ -0,0 +1,27 @@
+Create Exposure-Corrected Images
+================================
+
+1. Data reduction and create a basic manifest file (will be used by
+   subsequent tools):
+
+   ```sh
+   $ cd <obsid>
+   $ repro_acis.py
+   ```
+
+2. Clean the level=2 event file by removing point sources and flares:
+
+   ```sh
+   $ mkdir evt && cd evt
+   $ ln -s ../repro/*_repro_evt2.fits .
+   $ clean_evt2.py
+   $ cd ..
+   ```
+
+3. Get image grids (``xygrid`` output from ``get_fov_limits``):
+
+   ```sh
+   $ mkdir img && cd img
+   $ get_fov_limits "../repro/*_repro_fov1.fits[ccd_id=0:3]"  # ACIS-I
+   $ get_fov_limits "../repro/*_repro_fov1.fits[ccd_id=7]"  # ACIS-S
+   ```
-- 
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