ampel-nuclear 0.8.3

Astronomy units for the Ampel system to analyze nuclear events like TDEs

Ampel-nuclear

Central repository to host AMPEL code to search for and analyze nuclear transients. At the moment, this is exclusively code from the ZTFbh science working group.

Installation

Prerequisites

You need to export environment variables for the AMPEL ZTF archive (tokens are available here), for Fritz, and for the dropbox API (ask Sjoert).

Furthermore, you need a running instance of MongoDB. On macOS, make sure you have the command line tools installed (in doubt, run xcode-select –install).

Setup

Create a fresh Python 3.10 conda env

conda create -n tde_filter_upgrade python=3.10
conda activate tde_filter_upgrade

Install is done via poetry:

pip install poetry 
git clone https://github.com/AmpelProject/ampel-nuclear
cd Ampel-nuclear
poetry install

Now we have to build the ampel config and install it in the conda env. Issue

ampel config install

Note: this will throw some import errors, but you can ignore these because those packages are not needed locally.

Now you need to export the following tokens

export AMPEL_ARCHIVE_TOKEN='' 
export DROPBOX_TOKEN=''
export FRITZ_TOKEN=''

Test

To run the test, start your local MongoDB. And then issue

./run_tde_scan.py -i

If you cannot execute the file, issue chmod +x run_tde_scan.py.

Note: To push the result of a run to the dropbox, add -p.

The -i initiates (and saves) a new archive API stream token. To request one day, use -d YYYY-MM-DD for a certain day. The script will request alerts for the 24 hours after this date.

Your can also use --daysago n to scan the last n days.

Note: When requesting a full day with -d or the last n days with --daysago n from the archive, the first run will probably fail, as the archive database has not fully ramped up yet (URL is locked). In this case, just rerun ./run_tde_scan.py, without any parameters except for -p if you want to enable dropbox-push to prevent requesting a new stream token and overwriting the current one until the archive starts serving alerts (you will see them getting ingested).

To check the output, go to the temp directory that gets created when script is run without -p (push to dropbox), or check the dropbox.

To see all available commands of the test script, run ./run_tde_scan.py -h.

Examples

./run_tde_scan.py -i --daysago 4 -p

This will perform a search for the last 4 days and push the results to the dropbox.

./run_tde_scan.py -i -d 2022-10-06

This will perform a search for October 6, 2022 and save the result in a local directory.