Pith Number

pith:2VUGJWSI

pith:2012:2VUGJWSII75KP72QXS6JDYB67S

not attested not anchored not stored refs pending

Asymmetry in the Outburst of SN 1987A Detected Using Light Echo Spectroscopy

A. Rest, B. Sinnott, D. L. Welch, M. Bergmann, P. G. Sutherland

arxiv:1211.3781 v2 · 2012-11-16 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2VUGJWSII75KP72QXS6JDYB67S}

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	2026-05-18T01:53:10.607224Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d56864da4847faa7ff50bcbc91e03efcb41335869c8adde2d12ddb0523579f84

Aliases

arxiv: 1211.3781 · arxiv_version: 1211.3781v2 · doi: 10.48550/arxiv.1211.3781 · pith_short_12: 2VUGJWSII75K · pith_short_16: 2VUGJWSII75KP72Q · pith_short_8: 2VUGJWSI

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/2VUGJWSII75KP72QXS6JDYB67S \
  | 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: d56864da4847faa7ff50bcbc91e03efcb41335869c8adde2d12ddb0523579f84

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "75cd6ca0c997c49d8f36cfddd5f29dd3c2029b99799af3a31fece04abd5648c6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-11-16T01:19:38Z",
    "title_canon_sha256": "2f6f5f4a0850a57eed8232166fa318b897131347d12b69cd56450f3a549d9b23"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.3781",
    "kind": "arxiv",
    "version": 2
  }
}