Pith Number

pith:CI6IUDQV

pith:2015:CI6IUDQVQFFW57TGQE4VBQFZMR

not attested not anchored not stored refs pending

Evidence for two spatially separated UV continuum emitting regions in the Cloverleaf broad absorption line quasar

D. Hutsem\'ekers, D. Sluse, L. Braibant, P. Riaud, T. Anguita

arxiv:1508.05394 v2 · 2015-08-21 · astro-ph.GA · astro-ph.CO · astro-ph.HE · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CI6IUDQVQFFW57TGQE4VBQFZMR}

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	2026-05-18T01:29:44.966751Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

123c8a0e15814b6efe66813950c0b96459296b24cf01bcd5865592081be0fff3

Aliases

arxiv: 1508.05394 · arxiv_version: 1508.05394v2 · doi: 10.48550/arxiv.1508.05394 · pith_short_12: CI6IUDQVQFFW · pith_short_16: CI6IUDQVQFFW57TG · pith_short_8: CI6IUDQV

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/CI6IUDQVQFFW57TGQE4VBQFZMR \
  | 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: 123c8a0e15814b6efe66813950c0b96459296b24cf01bcd5865592081be0fff3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "087d6efde3f570041c17225df660c37bf98406c98d3b4e7b39400b41d5e2f297",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.HE",
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-08-21T20:07:27Z",
    "title_canon_sha256": "59599fd931ebbd7f00a5dfdf9539923885fbd5f45e67f89f02fcd106464cfa35"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.05394",
    "kind": "arxiv",
    "version": 2
  }
}