diff --git a/notebooks/tike_lcviz_tutorial.ipynb b/notebooks/tike_lcviz_tutorial.ipynb
index 103a951..8fc58e7 100644
--- a/notebooks/tike_lcviz_tutorial.ipynb
+++ b/notebooks/tike_lcviz_tutorial.ipynb
@@ -36,7 +36,7 @@
     "* [Additional Resources](#Additional-Resources)\n",
     "\n",
     "## Introduction\n",
-    "In this notebook we will be exploring the use of the [LCviz](https://github.com/spacetelescope/lcviz) (light curve visualization and analysis) tool for investigating time series observations of a transiting exoplanet. LCviz is built on the [Jdaviz](https://github.com/spacetelescope/jdaviz/) (James Webb data analysis and visualization) tool and additionally relies heavily on the [lightkurve](https://github.com/lightkurve/lightkurve) and [astropy](https://github.com/astropy/astropy) packages.\n",
+    "In this notebook we will be exploring the use of the [LCviz](https://github.com/spacetelescope/lcviz) (light curve visualization and analysis) tool for investigating time series observations of a transiting exoplanet. LCviz is built on the [Jdaviz](https://github.com/spacetelescope/jdaviz/) data analysis and visualization tool and additionally relies heavily on the [lightkurve](https://github.com/lightkurve/lightkurve) and [astropy](https://github.com/astropy/astropy) packages.\n",
     "\n",
     "Specifically, we will be using LCviz to look at a Kepler long cadence light curve of HAT-P-11, a K4V host to\n",
     "a transiting hot Neptune with a 4.8 day period, and a stellar rotation period of 29 days."
@@ -286,14 +286,14 @@
     "reference_time = time_coordinates.reference_time\n",
     "\n",
     "# literature ephemeris for hot Neptune planet HAT-P-11 b:\n",
-    "morris2017_epoch = Time(2454605.89146, format='jd')\n",
+    "morris2017_epoch = 2454605.89146  # BJD (TDB)\n",
     "morris2017_period = 4.88780258  # days\n",
     "\n",
     "# phase-fold the transit light curve in an ephemeris viewer:\n",
     "eph = lcviz.plugins['Ephemeris']\n",
     "eph.period = morris2017_period\n",
     "eph.t0 = (\n",
-    "    (morris2017_epoch - reference_time).to_value(time_coordinates.unit) % eph.period\n",
+    "    (morris2017_epoch - reference_time) % eph.period\n",
     ")\n",
     "\n",
     "# offset the wrapping phase so the transit (at phase 0) displays at center\n",