Pith Number

pith:HMPIQ5Y6

pith:2008:HMPIQ5Y6AGUBMQVJJAQGS7FDOY

not attested not anchored not stored refs pending

Quasar spectral energy distribution in EUV restored from associated absorbers: indications to the HeII opacity of the quasar accretion disk wind

D. Reimers, I. I. Agafonova, J. L. Hou, P. Molaro, S. A. Levshakov

arxiv:0802.0803 v1 · 2008-02-06 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HMPIQ5Y6AGUBMQVJJAQGS7FDOY}

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	2026-05-18T00:02:37.023236Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3b1e88771e01a81642a94820697ca3760ffdfe0882ae29c1a313debd99682b58

Aliases

arxiv: 0802.0803 · arxiv_version: 0802.0803v1 · doi: 10.48550/arxiv.0802.0803 · pith_short_12: HMPIQ5Y6AGUB · pith_short_16: HMPIQ5Y6AGUBMQVJ · pith_short_8: HMPIQ5Y6

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/HMPIQ5Y6AGUBMQVJJAQGS7FDOY \
  | 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: 3b1e88771e01a81642a94820697ca3760ffdfe0882ae29c1a313debd99682b58

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f39eaad5179bd483fdbc593358db3f44764177dfc0f0e46a109d5c4e0a1aea92",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-02-06T14:10:01Z",
    "title_canon_sha256": "a15d797a6c371b13b5fcdcc5b13cec40c0d262dc7c81a58d55ea8e36eecdb562"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0802.0803",
    "kind": "arxiv",
    "version": 1
  }
}