Pith Number

pith:NPSG7OMG

pith:2009:NPSG7OMGQAVK3NIDRH7SPF6Z3X

not attested not anchored not stored refs pending

Gravitational wave backgrounds and the cosmic transition from Population III to Population II stars

Raffaella Schneider, Stefania Marassi, Valeria Ferrari

arxiv:0906.0461 v1 · 2009-06-02 · 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{NPSG7OMGQAVK3NIDRH7SPF6Z3X}

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	2026-05-18T02:13:29.786574Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6be46fb986802aadb50389ff2797d9ddf0595b3383f04e9843da10fd1c7a8601

Aliases

arxiv: 0906.0461 · arxiv_version: 0906.0461v1 · doi: 10.48550/arxiv.0906.0461 · pith_short_12: NPSG7OMGQAVK · pith_short_16: NPSG7OMGQAVK3NID · pith_short_8: NPSG7OMG

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/NPSG7OMGQAVK3NIDRH7SPF6Z3X \
  | 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: 6be46fb986802aadb50389ff2797d9ddf0595b3383f04e9843da10fd1c7a8601

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3d850f5b78071c5de3323cb32ccdcf7174b00c7371b8c1ddc75cb335cf2b5f68",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-06-02T19:58:13Z",
    "title_canon_sha256": "e77ed88701fd23f49d3d14d6f7282575738274ec0c7394ff1ee2799a47dbccee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.0461",
    "kind": "arxiv",
    "version": 1
  }
}