TNS Newsfeed

Here we will notify about new features, modifications, open issues, and any general news and remarks...


In order to enable better querying and display of results according to both the discovering and classifying groups and facilties (instruments), we've added the following features to the main search page.

  • In the main query fields section: It is now possible to query by the Discovering and/or Classifying group/s (multiple select).
  • In the Advanced search - the fields have been re-ordered and it is now possible to query also by the Discovery and/or Classification instrument/s (multiple select).
  • Columns to display: The Discovering and Classifying groups are checked by default; it is possible to select for display also the Disc./Class. Instrument/s.
  • In the main table (resulting rows): 
    • Columns of the Discovering/Classifying Group/s show all relevant groups from which AT/Class reports were received (not only the "official" discoverer/classifier). In case of multiple groups, the first one is that of the "official" discovery/classification report.
  • If chosen for display, all relevant Disc./Class. instrument/s are shown (again, not just of the "official" discovery/classification report).


The KEGS-C17 catalog was added to the TNS, consisting of ~14300 galaxies (PI: Rest).

If willing to receive email notifications whenever a newly reported transient is found to coincide with a galaxy of this catalog,

please remember to check the KEGS-C17 checkbox at the bottom of the MY ACCOUNT page.


On Jan 28 we increased the (cone search) radius threshold for determining coinciding objects from 3 to 5 arcsec.

This should decrease the amount of situations in which a new object is created (the separation from an existing object exceeds the threshold), but then has to be united with an existing event.

The new threshold of 5" also serves as the default cone search radius on the home page and search page, whenever a query by coordinates is performed.


We have added a full set of python sample codes, kindly written by Nikola Knezevic, 

which can be used to help develop the required scripts to work with the TNS.

The codes cover all the existing APIs:

AT/Classification bulk reports (examples are provided for both JSON and TSV formats),

file uploads, update of proprietary end date, search and get object details.

The sample codes (PHP+Python) can be downloaded from the help page, under the relevant APIs sections.


We are very glad to inform that all the TNS discovery & classification reports (those that are the formal
"discoverers"/"classifiers") are now officially indexed on the NASA ADS system.

The bibcodes of the TNS reports begin with either YYYYTNSTR... or YYYYTNSCR...; TR standing for Transient (discovery)
Report, CR standing for Classification Report. The reports are arranged as daily aggregates per the reporting group and
reporter name/s (author/s).

Querying the ADS by object name (e.g. 2016A) or author/s retrieves any relevant TNS reports, so they can be officially
related to and cited.

On the ADS - for an index of a single object, clicking the "Electronic On-line Article" directs to the
discovery/classification certificate on the TNS. If an aggregate report for multiple objects, clicking the "On-line
Data" directs to the aggregate report on the TNS, which includes links to all objects' pages and certificates. 

A total of ~1800 ADS indexes are now (Jun 2017) in place for all TNS reports since the begining of operation in Jan 2016.


The KEGS-C14 catalog was added to the TNS, consisting of ~14500 galaxies (PI: Rest).

If willing to receive email notifications whenever a newly reported transient is found to coincide with a galaxy of this catalog,

please remember to check the KEGS-C14 checkbox at the bottom of the MY ACCOUNT page.

We added a display of the PS1 color stamp on the Object page, next to the SDSS thumbnail.

The PS1 stamp (if within the footprint) should become visible within ~1 hr after the appearance of a new object.


Improved cone search (on both the search page and in reporting of a new object) to handle computer truncation/rounding problems.

Corrected update of object discoverymag & discmagfilter when object switches to being public.


The TNS now manages LIGO GW events, creating for every newly detected event skymaps showing the known public TNS transients that are found to be within the localization contours.
The data of the new events are accessible only to members of groups that are part of the LV-EM MOU.
See the explanations of LIGO GW Events on our help page.