Two migrations:

    - 0052_update_gstlalcbc_O3b_cert.py: gstlalcbc was issued a new cert at CIT.
      I manually migrated on production and playground, but i'm backing up the
      migration here.
    - 0005_add_coinc_far_and_em_type.py: snapshotting the migration for the new
      `em_coinc` and `em_type` data fields. This will most likely change.

gracedb/ligoauth/migrations/0052_update_gstlalcbc_O3b_cert.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.20 on 2019-06-03 20:10
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+# The new cert and subject line came as a result of gstlalcbc's old 
+# certificate expiring on Oct 1, 2019. The new cert was generated 
+# on Oct 7, 2019 and expires Oct 7, 2020. So this one should get 
+# through O3b.
+
+ACCOUNT = {
+    'name': 'gstlalcbc',
+    'new_cert': '/DC=org/DC=cilogon/C=US/O=LIGO/OU=Robots/CN=cbc.ligo.caltech.edu/CN=gstlalcbc/CN=Chad Hanna/CN=UID:chad.hanna.robot',
+}
+
+
+def add_cert(apps, schema_editor):
+    RobotUser = apps.get_model('auth', 'User')
+
+    # Get user
+    user = RobotUser.objects.get(username=ACCOUNT['name'])
+
+    # Create new certificate
+    user.x509cert_set.create(subject=ACCOUNT['new_cert'])
+
+
+def delete_cert(apps, schema_editor):
+    RobotUser = apps.get_model('ligoauth', 'RobotUser')
+
+    # Get user
+    user = RobotUser.objects.get(username=ACCOUNT['name'])
+
+    # Delete new certificate
+    cert = user.x509cert_set.get(subject=ACCOUNT['new_cert'])
+    cert.delete()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('ligoauth', '0051_populate_grb_managers_authgroup'),
+    ]
+
+    operations = [
+        migrations.RunPython(add_cert, delete_cert),
+    ]

gracedb/superevents/migrations/0005_add_coinc_far_and_em_type.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.20 on 2019-05-15 18:07
+from __future__ import unicode_literals
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('superevents', '0004_populate_voevent_fields'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='Superevent',
+            name='coinc_far',
+            field=models.FloatField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name='Superevent',
+            name='em_type',
+            field=models.CharField(blank=True, default=b'', max_length=100),
+        ),
+    ]