Pith Number

pith:XMYCSADG

pith:2009:XMYCSADGYV4HGZNOIUWRTU5K43

not attested not anchored not stored refs pending

Observing gravitational waves from the first generation of black holes

Alberto Sesana, Alberto Vecchio, Ilya Mandel, Jonathan Gair

arxiv:0903.4177 v2 · 2009-03-24 · astro-ph.CO · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XMYCSADGYV4HGZNOIUWRTU5K43}

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	2026-07-04T17:18:44.533845Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bb30290066c5787365ae452d19d3aae6c87291f83c3a190f497230b2d3bcaa14

Aliases

arxiv: 0903.4177 · arxiv_version: 0903.4177v2 · doi: 10.48550/arxiv.0903.4177 · pith_short_12: XMYCSADGYV4H · pith_short_16: XMYCSADGYV4HGZNO · pith_short_8: XMYCSADG

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/XMYCSADGYV4HGZNOIUWRTU5K43 \
  | 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: bb30290066c5787365ae452d19d3aae6c87291f83c3a190f497230b2d3bcaa14

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d6dba81ede03df1803c548b8aaeccddb1e2a204067ecf7da0f45934e5c802adc",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-03-24T20:00:47Z",
    "title_canon_sha256": "0f820470b02ce46ea4cd1d80ad37ffd2c9932a48fd6584734e45783ce1659b10"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.4177",
    "kind": "arxiv",
    "version": 2
  }
}