From a5a8df8aaa037b18fb38f6ddfbf1b2e245a459c6 Mon Sep 17 00:00:00 2001
From: Sean McGuire <seanmcgu@andrew.cmu.edu>
Date: Mon, 29 Jan 2024 17:37:13 -0500
Subject: [PATCH] add class docstring

---
 src/hipscat/catalog/margin_cache/margin_catalog.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/hipscat/catalog/margin_cache/margin_catalog.py b/src/hipscat/catalog/margin_cache/margin_catalog.py
index cc7db8d8..743f9460 100644
--- a/src/hipscat/catalog/margin_cache/margin_catalog.py
+++ b/src/hipscat/catalog/margin_cache/margin_catalog.py
@@ -8,8 +8,12 @@
 
 
 class MarginCatalog(HealpixDataset):
-    """
+    """A HiPSCat Catalog used to contain the 'margin' of another HiPSCat catalog.
 
+    Catalogs of this type are used alongside a primary catalog, and contains the margin points for each
+    HEALPix pixel - any points that are within a certain distance from the HEALPix pixel boundary. This is
+    used to ensure spatial operations such as crossmatching can be performed efficiently while maintaining
+    accuracy.
     """
     # Update CatalogInfoClass, used to check if the catalog_info is the correct type, and
     # set the catalog info to the correct type