Pith Number

pith:3TWGVVYL

pith:2002:3TWGVVYLUDWCMZH7XH7T7UEZA5

not attested not anchored not stored refs pending

Detailed Spectroscopic Analysis of SN 1987A: The Distance to the LMC using the SEAM method

Chun S. J. Pun, David Branch, E. Baron, Peter E. Nugent, Peter H. Hauschildt, Peter Lundqvist, Robert C. Mitchell, Sergei Blinnikov

arxiv:astro-ph/0204012 v1 · 2002-03-31 · 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{3TWGVVYLUDWCMZH7XH7T7UEZA5}

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	2026-05-18T01:40:43.062694Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dcec6ad70ba0ec2664ffb9ff3fd099074ff897fe9b676af8c3dd7adcac14fede

Aliases

arxiv: astro-ph/0204012 · arxiv_version: astro-ph/0204012v1 · doi: 10.48550/arxiv.astro-ph/0204012 · pith_short_12: 3TWGVVYLUDWC · pith_short_16: 3TWGVVYLUDWCMZH7 · pith_short_8: 3TWGVVYL

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/3TWGVVYLUDWCMZH7XH7T7UEZA5 \
  | 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: dcec6ad70ba0ec2664ffb9ff3fd099074ff897fe9b676af8c3dd7adcac14fede

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "088fd17477b33020c07551c125fb85108639c524087548508204c4856f9536e6",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-03-31T17:47:07Z",
    "title_canon_sha256": "0cde54205f25f8a659b3347edcc92e5a1ed5b1aaa04bc2b5fe25ee596ba9ff16"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0204012",
    "kind": "arxiv",
    "version": 1
  }
}