Fix typos

03_ScienceExamples/PGIRLightCurves/PGIR_DR1_light_curves.ipynb

@@ -35,7 +35,7 @@
     "* [Goals & notebook summary](#goals)\n",
     "* [Disclaimer & attribution](#attribution)\n",
     "* [Imports & setup](#import)\n",
-    "* [Input search coordinate and generate light curve](#lightcurve)\n",
+    "* [Input search coordinates and generate light curve](#lightcurve)\n",
     "* [Lomb-Scargle periodogram analysis](#lombscargle)\n",
     "* [Resources and references](#resources)"
    ]
@@ -47,9 +47,9 @@
    "source": [
     "<a class=\"anchor\" id=\"goals\"></a>\n",
     "# Goals & notebook summary\n",
-    "The goal of this notebook is demonstrate how to generate light curves from the **Palomar Gattini-IR (PGIR) Data Release 1 (DR1)** catalog of infrared J-band light curves and also preform a basic Lomb-Scargle periodogram analysis to identify a period. \n",
+    "The goal of this notebook is to demonstrate how to generate light curves from the **Palomar Gattini-IR (PGIR) Data Release 1 (DR1)** catalog of infrared J-band light curves and also perform a basic Lomb-Scargle periodogram analysis to identify a period. \n",
     "\n",
-    "**Description of Palomar Gattini-IR:** PGIR is a wide-field, robotic, near-infrared time domain survey covering the entire visible night sky north of declination -28.5 at a median cadence of 2 nights. The survey operates in a single filter (J-band, calibrated to the 2MASS system), with a single exposure field of view of 25 square degrees and a native pixel scale of 8.7 arcsec/pixel. Further details about the instrument and data reduction system can be found in [De et al. (2020)](https://ui.adsabs.harvard.edu/abs/2020PASP..132b5001D/abstract). Light curves are extracted by performing Point Spread Function (PSF) photometry on the stacked images from each visit of a field, with the entire observing footprint divided into 1,329 fields. The first data release contains J-band light curves of approximately 286 million sources from the 2MASS catalog, with a total of approximately 50 billion photometric measurements [(Murakawa et al. 2024)](https://ui.adsabs.harvard.edu/abs/2024arXiv240601720M/abstract). \n",
+    "**Description of Palomar Gattini-IR:** PGIR is a wide-field, robotic, near-infrared time domain survey covering the entire visible night sky north of declination -28.5 at a median cadence of 2 nights. The survey operates in a single filter (J-band, calibrated to the 2MASS system), with a single exposure field of view of 25 square degrees and a native pixel scale of 8.7 arcsec/pixel. Further details about the instrument and data reduction system can be found in [De et al. (2020)](https://ui.adsabs.harvard.edu/abs/2020PASP..132b5001D/abstract). Light curves are extracted by performing Point Spread Function (PSF) photometry on the stacked images from each field visit, with the entire observing footprint divided into 1,329 fields. The first data release contains J-band light curves of approximately 286 million sources from the 2MASS catalog, with a total of approximately 50 billion photometric measurements [(Murakawa et al. 2024)](https://ui.adsabs.harvard.edu/abs/2024arXiv240601720M/abstract). \n",
     "\n",
     "**Science Example:** The science target in this notebook is the enigmatic NaSt1 system (also known as LS IV +005 and WR 122), which is thought to be an early-type wolf-rayet system enshrouded but a dense nebula. We will demonstrate how the PGIR light curves can be used to identify the periodic variability from this system, which was presented by [(Lau et al. 2021)](https://ui.adsabs.harvard.edu/abs/2021ApJ...922....5L/abstract)."
    ]
@@ -142,9 +142,9 @@
    "metadata": {},
    "source": [
     "<a class=\"anchor\" id=\"lightcurve\"></a>\n",
-    "# Input search coordinate and generate light curve\n",
+    "# Input search coordinates and generate light curve\n",
     "\n",
-    "### Enter RA and Dec (in degrees) of object and cone-search radius\n",
+    "### Enter RA and Dec (in degrees) of an object and cone-search radius\n",
     "As an example to demonstrate the utility of PGIR DR1, we will investigate the IR variability from the heavily enshrouded massive star system NaSt1 / WR122 [(Lau et al. 2021)](https://ui.adsabs.harvard.edu/abs/2021ApJ...922....5L/abstract). We will use a 0.01 degree cone-search radius to demonstrate how searches are handled when multiple 2MASS sources are identified.\n"
    ]
   },