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Author: jaladh-singhal

tutorials/euclid_access/euclid.md

@@ -6,6 +6,11 @@ It carries two instruments: the VISible instrument (VIS) and the Near-Infrared S
 [Quick Release 1 (Q1)](https://irsa.ipac.caltech.edu/data/Euclid/docs/overview_q1.html) was released in March 2025 and consists of approximately 35 TB of imaging, spectroscopy, and catalogs, covering four non-contiguous fields totaling 63 square degrees.
 Data products include MERged mosaics of calibrated and stacked frames; combined infrared spectra (SIR); and catalogs of MER objects, photometric redshifts and classifications (PHZ), and spectroscopic redshifts and line measurements (SPE).
 
+Data products include:
+- MER (merged) mosaic images of calibrated and stacked frames;
+- SIR combined infrared spectra;
+- Catalogs of MER objects, photometric redshifts and classifications (PHZ), and spectroscopic redshifts and line measurements (SPE);
+- Merged Objects Catalog (created by IRSA) containing the MER, PHZ, and SPE catalogs in a single HATS Catalog.
 
 ````{grid} 1 2 2 3
 
@@ -28,6 +33,13 @@ Load a galaxy spectrum and plot it. Understand the wavelength, flux, and mask va
 Explore the columns in the MER final catalog, query for stars, and create a color-magnitude diagram.
 ```
 
+```{card}
+:link: 4_Euclid_intro_PHZ_catalog.md
+:header: [PHZ Catalogs →](4_Euclid_intro_PHZ_catalog.md)
+
+Join the PHZ and MER catalogs to query galaxies with quality redshifts in a box region, create MER mosaic cutouts with catalog overlays, and plot the brightest galaxy's SIR spectrum.
+```
+
 ```{card}
 :link: 5_Euclid_intro_SPE_catalog.md
 :header: [SPE Catalogs →](5_Euclid_intro_SPE_catalog.md)
@@ -36,10 +48,15 @@ Join the SPE and MER catalogs and query for galaxies with H-alpha line detection
 ```
 
 ```{card}
-:link: 4_Euclid_intro_PHZ_catalog.md
-:header: [PHZ Catalogs →](4_Euclid_intro_PHZ_catalog.md)
+:link: ../parquet-catalog-demos/euclid-q1-hats/1-euclid-q1-hats-intro.md
+:header: [Merged Objects Catalog →](../parquet-catalog-demos/euclid-q1-hats/1-euclid-q1-hats-intro.md)
+Introduction: Understand the content and format of the Euclid Q1 Merged Objects HATS Catalog, then perform a basic query.
+```
 
-Join the PHZ and MER catalogs to query galaxies with quality redshifts in a box region, create MER mosaic cutouts with catalog overlays, and plot the brightest galaxy's SIR spectrum.
+```{card}
+:link: ../parquet-catalog-demos/euclid-q1-hats/4-euclid-q1-hats-magnitudes.md
+:header: [Merged Objects Catalog →](../parquet-catalog-demos/euclid-q1-hats/4-euclid-q1-hats-magnitudes.md)
+Magnitudes: Review the types of flux measurements available, load template-fit and aperture magnitudes, and plot distributions and comparisons for different object types.
 ```
 
 ```{card}
@@ -54,16 +71,4 @@ Browse the on-cloud copy of Q1, then efficiently retrieve a MER mosaic cutout an
 Create multi-wavelength ERO image cutouts of a globular cluster, extract sources, and measure photometry. Match Gaia sources with Euclid ERO catalogs, then visualize with Firefly.
 ```
 
-```{card} Introduction
-:link: ../parquet-catalog-demos/euclid-q1-hats/1-euclid-q1-hats-intro.md
-:header: [Merged Objects Catalog →](../parquet-catalog-demos/euclid-q1-hats/1-euclid-q1-hats-intro.md)
-Understand the content and format of the Euclid Q1 Merged Objects HATS Catalog, then perform a basic query.
-```
-
-```{card} Magnitudes
-:link: ../parquet-catalog-demos/euclid-q1-hats/4-euclid-q1-hats-magnitudes.md
-:header: [Merged Objects Catalog →](../parquet-catalog-demos/euclid-q1-hats/4-euclid-q1-hats-magnitudes.md)
-Review the types of flux measurements available, load template-fit and aperture magnitudes, and plot distributions and comparisons for different object types.
-```
-
 ````