Added note about convergence to OFTI tutorial

docs/tutorials/OFTI_tutorial.ipynb

@@ -6,7 +6,7 @@
    "source": [
     "# OFTI Introduction #\n",
     "\n",
-    "by Isabel Angelo (2018)\n",
+    "by Isabel Angelo and Sarah Blunt (2018)\n",
     "\n",
     "OFTI (Orbits For The Impatient) is an orbit-generating algorithm designed specifically to handle data covering short fractions of long-period exoplanets [Blunt et al. 2017](https://ui.adsabs.harvard.edu/#abs/2017AJ....153..229B/abstract). Here we go through steps of using OFTI within `orbitize`!"
    ]
@@ -368,6 +368,17 @@
     "corner_figure = myResults.plot_corner(param_list=['sma1', 'ecc1', 'inc1', 'aop1', 'pan1','epp1'])"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### A Note about Convergence\n",
+    "\n",
+    "Those of you with experience looking at corner plots will note that the result here does not look converged (i.e. we need more samples for our results to be statistically significant). Because this is a tutorial, we didn't want you to have to wait around for a while for the OFTI results to converge.\n",
+    "\n",
+    "**It's safe to say that OFTI should accept a minimum of 10,000 orbit for convergence. For pretty plots to go in publications, we recommend at least 1,000,000 accepted orbits.**"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},