Pith Number

pith:H54SF7P7

pith:1999:H54SF7P733XFDQX3P5IU53LXKD

not attested not anchored not stored refs pending

FIRST Bent-Double Radio Sources: Tracers of High-Redshift Clusters

D. J. Helfand, E. L. Blanton, M. D. Gregg, R. H. Becker, & R. L. White

arxiv:astro-ph/9910099 v1 · 1999-10-06 · 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{H54SF7P733XFDQX3P5IU53LXKD}

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	2026-07-04T16:11:40.597177Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f7922fdffdeee51c2fb7f514eed7750e1467ccf7d674e2653daa61b90bd0455

Aliases

arxiv: astro-ph/9910099 · arxiv_version: astro-ph/9910099v1 · doi: 10.48550/arxiv.astro-ph/9910099 · pith_short_12: H54SF7P733XF · pith_short_16: H54SF7P733XFDQX3 · pith_short_8: H54SF7P7

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/H54SF7P733XFDQX3P5IU53LXKD \
  | 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: 3f7922fdffdeee51c2fb7f514eed7750e1467ccf7d674e2653daa61b90bd0455

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cea29169345702ea03bd505a7f3ecb54a29a6989843032fbff80400957b655e2",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-10-06T00:07:44Z",
    "title_canon_sha256": "aa6767de344dc1aeda476896e6e49f52df07dd85b4ed1ddcc9c6e1d1e0761d92"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9910099",
    "kind": "arxiv",
    "version": 1
  }
}