tom-nonlocalizedevents 0.8.1

Reusable TOMToolkit app to support gravitational wave superevent and other nonlocalized event EM follow-up observations.

GW Superevent (or GRB, Neutrino) EM follow-up

This reusable TOM Toolkit app provides support for gravitational wave (GW) superevent and other non-localized event electromagnetic (EM) follow up observations.

Requirements

This TOM plugin requires the use of a postgresql 14+ database backend, since it leverages some postgres specific stuff for MOC volume map lookups.

Installation

1. Install the package into your TOM environment:

   pip install tom-nonlocalizedevents
   

2. In your project settings.py, add tom_nonlocalizedevents and webpack_loader to your INSTALLED_APPS setting:

   INSTALLED_APPS = [
       'webpack_loader',
       ...
       'tom_nonlocalizedevents',
   ]
   

   Also include the following Django-Webpack-Loader settings in your settings.py:

   VUE_FRONTEND_DIR_TOM_NONLOCAL = os.path.join(STATIC_ROOT, 'tom_nonlocalizedevents/vue')
   WEBPACK_LOADER = {
       'TOM_NONLOCALIZEDEVENTS': {
           'CACHE': not DEBUG,
           'BUNDLE_DIR_NAME': 'tom_nonlocalizedevents/vue/',  # must end with slash
           'STATS_FILE': os.path.join(VUE_FRONTEND_DIR_TOM_NONLOCAL, 'webpack-stats.json'),
           'POLL_INTERVAL': 0.1,
           'TIMEOUT': None,
           'IGNORE': [r'.+\.hot-update.js', r'.+\.map']
       }
   }
   

   If WEBPACK_LOADER is already defined in your settings, then integrate these values in to it.

   Also add the following to your settings if they are not already there, setting whatever default values you need for your setup. These point to your deployed TOM toolkit instance, and to a hermes instance:

   TOM_API_URL = os.getenv('TOM_API_URL', 'http://127.0.0.1:8000')
   HERMES_API_URL = os.getenv('HERMES_API_URL', 'https://hermes-dev.lco.global')
   

3. Include the tom_nonlocalizedevent URLconf in your project urls.py:

   urlpatterns = [
        ...
        path('nonlocalizedevents/', include('tom_nonlocalizedevents.urls', namespace='nonlocalizedevents')),
   ]
   

4. Run python manage.py migrate to create the tom_nonlocalizedevents models.

5. Set environment variables below to configure different connections:

Env variable	Description	Default
SA_DB_CONNECTION_URL	Location of your django postgres database used for sqlalchemy	by default, this uses Django default DB for the project
POOL_SIZE	The number of connections to keep open inside the connection pool. (docs)	5
MAX_OVERFLOW	The number of connections to allow in connection pool “overflow”. (docs)	10
CREDIBLE_REGION_PROBABILITIES	JSON List of Credible Region probabilities to automatically check each candidate target for	'[0.25, 0.5, 0.75, 0.9, 0.95]'
SAVE_TEST_ALERTS	Boolean on if you want to save test nonlocalizedevents into your database (those with event_id beginning with 'M')	true

See Engine Configuration for details of SQLAlchemy Engine Configuration.

6. In your TOM project, make sure to run python manage.py collectstatic after installing this app, to collect its Vue pages into your staticfiles directory.

7. If you want to automatically ingest GW events into your TOM, you should also install the tom_alertstreams app into your TOM and configure it to use the tom_nonlocalizedevents handler to ingest GW events. The preferred way is to use the hop igwn.gwalerts topic and set it to the handler tom_nonlocalizedevents.alertstream_handlers.igwn_event_handler.handle_igwn_message. This format has the newest Ligo O4 fields. There is legacy support for the gcn classic over kafka plaintext formatted LVC alerts using the handler tom_nonlocalizedevents.alertstream_handlers.gcn_event_handler.handle_message. There is also a handler to handle retractions via the handle_retraction method in that package. For an example of what needs to be in your settings to configure tom_alertstreams for these streams, look here

Development

When any changes are made to this library, the vue files will need to be build and bundled and committed into the repo so that they can be bundled and deployed with the django package. This means that after making any vue changes, you must run npm run build within the tom_nonlocalizedevents_vue directory once, which will install the built files into tom_nonlocalizedevents/static/, and then those built files will need to be committed into the repo. This allows django projects using this library to get those files when running python manage.py collectstatic.

Running the tests

In order to run the tests, run the following in your virtualenv:

python manage.py test