Pith Number

pith:XIUTVB5U

pith:2019:XIUTVB5UEY3HJBCBBBJIRD3ESE

not attested not anchored not stored refs pending

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves

Andy D. Goulding, Chiara M.F. Mingarelli, Jenny E. Greene, Kris Pardo, Kristina Nyland, Michael A. Strauss

arxiv:1907.03757 v1 · 2019-07-08 · astro-ph.GA · astro-ph.HE · 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{XIUTVB5UEY3HJBCBBBJIRD3ESE}

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	2026-05-17T23:40:29.700882Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba293a87b426367484410852888f6491232f14fe974b809330f0f370b5d34c86

Aliases

arxiv: 1907.03757 · arxiv_version: 1907.03757v1 · doi: 10.48550/arxiv.1907.03757 · pith_short_12: XIUTVB5UEY3H · pith_short_16: XIUTVB5UEY3HJBCB · pith_short_8: XIUTVB5U

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/XIUTVB5UEY3HJBCBBBJIRD3ESE \
  | 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: ba293a87b426367484410852888f6491232f14fe974b809330f0f370b5d34c86

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f9991e4ba2329f7ba558a54799ccc3bfb13080a613f00e311229b4e1dcc8473",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-07-08T18:00:00Z",
    "title_canon_sha256": "20c1c43a173b2c6569cc61b23f7f1511b80d8ca00110a7f051a9eb8f291bd5d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.03757",
    "kind": "arxiv",
    "version": 1
  }
}