Pith Number

pith:CAOBNUBT

pith:2018:CAOBNUBTWO3UXPTTWQGXWXFRNA

not attested not anchored not stored refs pending

Serendipitous Detection of HI Absorption Sets the True Redshift of 4C +15.05 to $z=0.833$

Chris J. Salter, Kristen M. Jones, Tapasi Ghosh

arxiv:1804.09225 v1 · 2018-04-24 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CAOBNUBTWO3UXPTTWQGXWXFRNA}

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	2026-05-18T00:09:52.331152Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

101c16d033b3b74bbe73b40d7b5cb1680ec4c83ad5a1c3ac817a0d5b8ad85fc8

Aliases

arxiv: 1804.09225 · arxiv_version: 1804.09225v1 · doi: 10.48550/arxiv.1804.09225 · pith_short_12: CAOBNUBTWO3U · pith_short_16: CAOBNUBTWO3UXPTT · pith_short_8: CAOBNUBT

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/CAOBNUBTWO3UXPTTWQGXWXFRNA \
  | 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: 101c16d033b3b74bbe73b40d7b5cb1680ec4c83ad5a1c3ac817a0d5b8ad85fc8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "40775ac8d7cc26ebb2c659a42d492be1b3c8c3e8ee20ccd6704509e899259d88",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-04-24T19:31:53Z",
    "title_canon_sha256": "7f1eca82e230961dca4398c699f2588c86c419894eec9592b0be5ec736d4723a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.09225",
    "kind": "arxiv",
    "version": 1
  }
}