Pith Number

pith:2MDXCKKL

pith:1999:2MDXCKKLRQQPFVT5WLFPKFHFZB

not attested not anchored not stored refs pending

Gravitational Waves Signals from the Collapse of the First Stars

A. Ferrara (2), B. Ciardi (3), Firenze, Italy), Italy (2) Osservatorio Astrofisico di Arcetri, Italy (3) Dip. di Astronomia, Italy (4) Dip. di Fisica, R. Schneider (1), S. Matarrese (4) ((1) Dip. di Fisica, Universita' di Firenze, Universita' di Padova, Universita' di Roma "La Sapienza", V. Ferrari (1)

arxiv:astro-ph/9909419 v1 · 1999-09-24 · 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{2MDXCKKLRQQPFVT5WLFPKFHFZB}

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.

Cited by

1 paper in Pith

Science with the Einstein Telescope: a comparison of different designs

Receipt and verification

First computed	2026-07-04T16:11:38.983949Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d30771294b8c20f2d67db2caf514e5c86549dbc50ed0110aba976c9f98ca5b71

Aliases

arxiv: astro-ph/9909419 · arxiv_version: astro-ph/9909419v1 · doi: 10.48550/arxiv.astro-ph/9909419 · pith_short_12: 2MDXCKKLRQQP · pith_short_16: 2MDXCKKLRQQPFVT5 · pith_short_8: 2MDXCKKL

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/2MDXCKKLRQQPFVT5WLFPKFHFZB \
  | 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: d30771294b8c20f2d67db2caf514e5c86549dbc50ed0110aba976c9f98ca5b71

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ec5e6e4241634ccbcc80a5783375b857f39839b03383a7abd9b2b709f3e7cee",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-09-24T15:04:36Z",
    "title_canon_sha256": "6ee5ac617457f078fc73830c6a6502ec0be0e9cc7ea5480ba9e0c6f66b87d617"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9909419",
    "kind": "arxiv",
    "version": 1
  }
}