Pith Number

pith:SLDMMVH7

pith:2018:SLDMMVH7NV32ULTFORNPAO5EGL

not attested not anchored not stored refs pending

First Spectroscopic Study of a Young Quasar

Anna-Christina Eilers, Frederick B. Davies, Joseph F. Hennawi

arxiv:1806.05691 v1 · 2018-06-14 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SLDMMVH7NV32ULTFORNPAO5EGL}

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	2026-05-18T00:01:29.297555Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

92c6c654ff6d77aa2e65745af03ba432ec229b29e01f0ab4a3ff1923091df835

Aliases

arxiv: 1806.05691 · arxiv_version: 1806.05691v1 · doi: 10.48550/arxiv.1806.05691 · pith_short_12: SLDMMVH7NV32 · pith_short_16: SLDMMVH7NV32ULTF · pith_short_8: SLDMMVH7

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/SLDMMVH7NV32ULTFORNPAO5EGL \
  | 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: 92c6c654ff6d77aa2e65745af03ba432ec229b29e01f0ab4a3ff1923091df835

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80aacd2d532deeb933c3be8b6948b44d3cc164ac050ea6dc8a7a69a62664e476",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-06-14T18:00:15Z",
    "title_canon_sha256": "a5d35b0be4badad445e475ed80c693895e123f7311358e020ab24c524620d998"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.05691",
    "kind": "arxiv",
    "version": 1
  }
}