Pith Number

pith:ZW5HHW75

pith:2015:ZW5HHW75YZZZA6MOQLCB2AFNDE

not attested not anchored not stored refs pending

A quasar reddened by a sub-parsec sized, metal-rich and dusty cloud in a damped Lyman-alpha absorber at z=2.13

A. Stockton, C. Ledoux, J.-K. Krogager, J. P. U. Fynbo, P. M{\o}ller, P. Noterdaeme, T. Kr\"uhler, T. Zafar

arxiv:1510.04695 v1 · 2015-10-15 · 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{ZW5HHW75YZZZA6MOQLCB2AFNDE}

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	2026-05-18T00:42:18.063604Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cdba73dbfdc67390798e82c41d00ad1906520887b28e3b3447d9fc189cbef1ef

Aliases

arxiv: 1510.04695 · arxiv_version: 1510.04695v1 · doi: 10.48550/arxiv.1510.04695 · pith_short_12: ZW5HHW75YZZZ · pith_short_16: ZW5HHW75YZZZA6MO · pith_short_8: ZW5HHW75

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/ZW5HHW75YZZZA6MOQLCB2AFNDE \
  | 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: cdba73dbfdc67390798e82c41d00ad1906520887b28e3b3447d9fc189cbef1ef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c3db42d143dbdfb60ad0485846b7812cd9ebcd55a1fc16e81bb413affec5842",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-10-15T20:03:42Z",
    "title_canon_sha256": "8787723327675a5ebce0e7b5209ec7d4402d978ef635534e618c620b3c449ff3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.04695",
    "kind": "arxiv",
    "version": 1
  }
}