OBJECT_ID:
B_SN1987A

OBJECT_NAME:
SN 1987A

PHASE:
B_supernova_light_curves

RAW_SOURCE:
Open Supernova Catalog / AstroCats year-bucket repository

SOURCE_REPOSITORY:
https://github.com/astrocatalogs/sne-pre-1990

RAW_FILE_URL:
https://raw.githubusercontent.com/astrocatalogs/sne-pre-1990/master/SN1987A.json

LOCAL_RAW_FILE:
B_supernova_light_curves/raw/SN1987A/SN1987A_OSC_raw.json

EXPECTED_CONTENT:
metadata
aliases
classification
photometry
references

UNNS_ROLE:
First observed post-collapse brightness trajectory.
Boundary-response anchor for Phase B.
Used to construct the first STRUC_PERC_I-compatible light-curve ladder.

BOUNDARY_DYNAMICS_INTERPRETATION:
SN 1987A provides an observed post-collapse brightness-time record.
It does not represent the hidden pre-collapse stellar interior directly.
It records the observable response after boundary failure and explosion routing
into ejecta/remnant dynamics.

SCHEMA_TARGET:
B_supernova_light_curves/B_light_curve_ladder_schema.csv

EXPECTED_CANONICAL_OUTPUT:
B_supernova_light_curves/ladders/B_SN1987A_light_curve_ladder.csv

STATUS:
Raw OSC JSON acquired.
Awaiting JSON inspection and photometry extraction.