Pith Number

pith:X4W5DYW6

pith:2020:X4W5DYW6KKTSUT6AA6WCFWFWTZ

not attested not anchored not stored refs pending

Is GW190521 the merger of black holes from the first stellar generations?

Cyril Georgy, Eoin J. Farrell, Etienne Kaiser, Georges Meynet, Jose H. Groh, Laura Murphy, Raphael Hirschi, Sylvia Ekstr\"om

arxiv:2009.06585 v2 · 2020-09-14 · astro-ph.SR · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{X4W5DYW6KKTSUT6AA6WCFWFWTZ}

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

3 papers in Pith

GWTC-2.1: Deep Extended Catalog of Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run

Second-Generation Mass Peak in the Gravitational-Wave Population as a Probe of Globular Clusters

Signatures of a subpopulation of hierarchical mergers in the GWTC-4 gravitational-wave dataset

Receipt and verification

First computed	2026-07-05T02:04:58.137994Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bf2dd1e2de52a72a4fc007ac22d8b69e7ebc372d62fe2c5a47f8304cda8e8cb4

Aliases

arxiv: 2009.06585 · arxiv_version: 2009.06585v2 · doi: 10.48550/arxiv.2009.06585 · pith_short_12: X4W5DYW6KKTS · pith_short_16: X4W5DYW6KKTSUT6A · pith_short_8: X4W5DYW6

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/X4W5DYW6KKTSUT6AA6WCFWFWTZ \
  | 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: bf2dd1e2de52a72a4fc007ac22d8b69e7ebc372d62fe2c5a47f8304cda8e8cb4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "43b52dc4f7a2f8c2e7627e323746b7ab4b527fa06e05eedae62db7b6f2e6a1fd",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2020-09-14T17:17:18Z",
    "title_canon_sha256": "9d6aa21695211cd0ef7ba06002f5e687ff96a7bfbec75d88814869909c9f1455"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2009.06585",
    "kind": "arxiv",
    "version": 2
  }
}