SOURCE_ID: B3

SOURCE_NAME:
Transient Name Server

SOURCE_URL:
https://www.wis-tns.org/

SEARCH_URL:
https://www.wis-tns.org/search

SOURCE_TYPE:
Official transient naming, reporting, and classification source

SOURCE_ROLE:
Object identity, official names, coordinates, classifications, discovery metadata,
redshift, host-galaxy information, and cross-source alignment key for supernova
light-curve ladders.

SOURCE_NOTES:
The Transient Name Server is the official IAU mechanism for reporting new
astronomical transients, including supernova candidates. Since 2016, it has
served as the naming/reporting authority for astronomical transients.

The search interface allows tabular results to be downloaded as CSV or TSV,
which makes it suitable for source indexing and pilot-object selection.

FIELDS_TO_EXTRACT:
official_name
discovery_name
object_type
classification
classification_date
discovery_date
ra
dec
redshift
host_name
host_redshift
reporting_group
discovery_group
internal_names
tns_id
source_url

UNNS_ROLE:
Object identity anchor.
Classification authority.
Cross-source alignment key between OSC, ZTF, WISeREP, and remnant catalogs.
Supports selection of core-collapse supernova objects for STRUC_PERC_I
light-curve ladder construction.

STRUC_PERC_I_USE:
TNS does not provide the primary brightness-time ladder itself.
Instead, it stabilizes the object identity and classification layer:

TNS object identity
→ OSC/ZTF photometry
→ canonical light-curve stages
→ STRUC_PERC_I ladder

BOUNDARY-DYNAMICS_INTERPRETATION:
B3 anchors each observed supernova as a named and classified transient event.
It helps prevent mixing aliases, duplicate reports, misclassified objects, or
coordinate-confused sources when constructing post-collapse observable ladders.

STATUS:
Source registered.
Bulk object table not downloaded yet.
Awaiting pilot object selection and crossmatch with B1/B2.