TNS Newsfeed

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

The Transient Name Server (TNS) has been serving since Jan 2016 as the official IAU mechanism to announce and name newly
discovered transients. A major goal of this activity is to allow the community to easily connect object names with
precise information about these objects, in particular, their coordinates. The TNS issues automatic discovery and
classification reports for objects that are distributed to registered users and are indexed on the ADS.

In recent months we have identified a need for an expanded service providing a channel to announce to the community
messages covering a broader range of subjects. To answer this need, we have launched the TNS AstroNotes service. This
service allows all registered users to distribute notifications regarding a broad range of astrophysical topics to those
TNS users that choose to subscribe to the AstroNotes service. These include in particular:

1. Notifications about new astrophysical tools and utilities. 
2. Notifications about new surveys or new observing campaigns.  
3. Notes about discovery or classification of objects that contain more elaborate information than the
automated TNS notifications, including in  particular notifications about re-classification of objects.  
4. Notes providing additional data or analysis of transients.  
5. General notifications of interest to the community.

The AstroNotes system is built to automatically connect notes to the related objects, thus making it possible to search
for information about an object by coordinates or object name.

All AstroNotes are public, are provided free of charge to post and to read and are indexed on the ADS and citable.

All registered TNS users can submit AstroNotes, as long as they comply with general ethical standards for scientific
publications (including proper credit via references), with applicable laws, and their contents are scientifically
relevant to the TNS community.

We have initially subscribed all TNS users to this service in order to distribute this notification. If you would prefer
to not receive any additional AstroNotes, or to select which notifications to receive and how often, just login to the
TNS, go to "My Account", scroll down to the "AstroNotes notifications" box and change your preferences accordingly.

We hope you find this service useful, and please feel free to send us any comments or requests to tns AT weizmann.ac.il.

 
A new switch (query field) was added to the Search API ->  "public_timestamp".
If specifying here a certain date-time, the query will retrieve all objects that received a (public) discovery or classification report after that time.
This can serve for querying and downloading object details (using the "Get object" API for the retrieved object names) according to what was added/changed on the TNS from a specified date-time.
This covers also situations where e.g. an already known/existing object receives new information such as spectra (classification reports) etc...
 
As you can see on the sandbox API TEST FORM, here are the current parameters of the Search API:
 
{
  "ra": "",
  "dec": "",
  "radius": "",
  "units": "",
  "objname": "",
  "internal_name": "",
  "public_timestamp": ""
}

 

 

We have updated the interactive spectra plots.

The rest-frame wavelengths are now shown on the bottom x-axis (observed frame at the top);

the elements checkboxes (for over-plotting their lines) have been revised, now enabling to select separately the forbidden lines.

To view the spectra on separate plots, click the figure icons in the spectra list (below the aggregated plot).

 

The TESS FOVs are now maintained on the TNS, so that notifications can be received whenever a reported transient coincides with the current TESS FOV.

As with previous catalogs, on your "My Account" page, check the TESS-SectorX checkbox for receiving live notifications via email.

Every ~1 month there's a shift of sector and a new sector will become active (you may check the schedule here: https://tess.mit.edu/observations/#sched).

Please make sure to mark each new sector whenever it becomes available. 

 

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).

https://keplerscience.arc.nasa.gov/k2-approved-programs.html#campaign-14

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.

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