Pith Number

pith:MESSAV35

pith:1997:MESSAV35UIMBSV4NRQ5UVIJJD2

not attested not anchored not stored refs pending

SN 1987A - Presupernova Evolution and the Progenitor Star

A. Heger (MPA, Garching), Livermore), N. Langer (Univ. Potsdam), S.E. Woosley (UC Santa Cruz), T.A. Weaver (LLNL

arxiv:astro-ph/9705146 v1 · 1997-05-20 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MESSAV35UIMBSV4NRQ5UVIJJD2}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-04T14:15:07.350567Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

612520577da21819578d8c3b4aa1291eb5eeefd8093f354dc16c72b86e2d780e

Aliases

arxiv: astro-ph/9705146 · arxiv_version: astro-ph/9705146v1 · doi: 10.48550/arxiv.astro-ph/9705146 · pith_short_12: MESSAV35UIMB · pith_short_16: MESSAV35UIMBSV4N · pith_short_8: MESSAV35

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/MESSAV35UIMBSV4NRQ5UVIJJD2 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 612520577da21819578d8c3b4aa1291eb5eeefd8093f354dc16c72b86e2d780e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42610210ec983ce29d0064703c0c2f96cb8d0d6dd404cf207bf4989768eedd20",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-05-20T05:27:58Z",
    "title_canon_sha256": "f7c5e2108bead6cf4bb136bb97216479284dece419f78465ff09c94a1f491833"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9705146",
    "kind": "arxiv",
    "version": 1
  }
}