Pith Number

pith:QS7OKRNM

pith:2021:QS7OKRNMOEU6ORMUATTHI5TQ5I

not attested not anchored not stored refs pending

Discovery of extremely low-metallicity circumgalactic gas at $z = 0.5$ toward Q0454-220

Bart P. Wakker, Christopher W. Churchill, Glenn G. Kacprzak, Jackson M. Norris, Jane C. Charlton, Sowgat Muzahid

arxiv:2106.12927 v2 · 2021-06-24 · 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{QS7OKRNMOEU6ORMUATTHI5TQ5I}

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	2026-07-05T02:57:24.439906Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84bee545ac7129e7459404e6747670ea27ff3333b55b88f0e5168c44375e7743

Aliases

arxiv: 2106.12927 · arxiv_version: 2106.12927v2 · doi: 10.48550/arxiv.2106.12927 · pith_short_12: QS7OKRNMOEU6 · pith_short_16: QS7OKRNMOEU6ORMU · pith_short_8: QS7OKRNM

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/QS7OKRNMOEU6ORMUATTHI5TQ5I \
  | 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: 84bee545ac7129e7459404e6747670ea27ff3333b55b88f0e5168c44375e7743

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1ba1acc23b3651fa4125e6a95634a187d4f192d4edbca97191683d9e80c92bae",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-06-24T11:43:17Z",
    "title_canon_sha256": "c54ae0fa26cfda7c47516e84c430e0a18b920109b1a8ccdf1328fa49fce4d63f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2106.12927",
    "kind": "arxiv",
    "version": 2
  }
}