Pith Number

pith:4QTOSV6K

pith:2018:4QTOSV6KWJ5TLKW4S6T6SAIM2S

not attested not anchored not stored refs pending

The Gaseous Environments of Quasars: Associate Absorption Lines with Density and Distance Constraints

Chen Chen, Fred Hamann, Leah Simon, Thomas Barlow

arxiv:1809.05433 v1 · 2018-09-14 · 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{4QTOSV6KWJ5TLKW4S6T6SAIM2S}

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	2026-05-18T00:05:41.452759Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e426e957cab27b35aadc97a7e9010cd4842d005b8dc7201b664f052aebe8333a

Aliases

arxiv: 1809.05433 · arxiv_version: 1809.05433v1 · doi: 10.48550/arxiv.1809.05433 · pith_short_12: 4QTOSV6KWJ5T · pith_short_16: 4QTOSV6KWJ5TLKW4 · pith_short_8: 4QTOSV6K

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/4QTOSV6KWJ5TLKW4S6T6SAIM2S \
  | 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: e426e957cab27b35aadc97a7e9010cd4842d005b8dc7201b664f052aebe8333a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d51d5560071f6a9e461303c686a2cf24b68e9de3e28e10990f3c664acce2f9f4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-09-14T14:14:08Z",
    "title_canon_sha256": "37b0cbc41daa05b35b3e8d2733df8e89ac1fd2a9a5ea444cad958c995552ccc6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.05433",
    "kind": "arxiv",
    "version": 1
  }
}