Merge pull request #59 from bsipocz/euclid_notebook4

Adding Euclid notebook4

Author: bsipocz

index.md

@@ -66,6 +66,7 @@ caption: Euclid Quick Release 1
 tutorials/euclid_access/1_Euclid_intro_MER_images
 tutorials/euclid_access/2_Euclid_intro_MER_catalog
 tutorials/euclid_access/3_Euclid_intro_1D_spectra
+tutorials/euclid_access/4_Euclid_intro_PHZ_catalog
 tutorials/euclid_access/5_Euclid_intro_SPE_catalog
 tutorials/cloud_access/euclid-cloud-access