Pith Number

pith:4QRTQMDB

pith:2007:4QRTQMDB5PUETWZYODOKKJMZFZ

not attested not anchored not stored refs pending

Multiwavelength Observations of the Powerful Gamma-ray Quasar PKS 1510-089: Clues on the Jet Composition

D.Grupe, D.Impiombato, G.Madejski, G.Tosti, J.Kataoka, L.Stawarz, M.M.Chester, M.Sikora, N.Kawai, P.G.Edwards, P.Roming, R.Moderski, R.Sato, S.J.Wagner, S.Watanabe, T.Takahashi, Y.A.Kovalev, Y.Tsubuku, Y.Y.Kovalev

arxiv:0709.1528 v1 · 2007-09-11 · 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{4QRTQMDB5PUETWZYODOKKJMZFZ}

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	2026-05-18T04:36:41.931240Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e423383061ebe849db3870dca525992e4d109877c05c99e7bc5417742c78ef3d

Aliases

arxiv: 0709.1528 · arxiv_version: 0709.1528v1 · doi: 10.48550/arxiv.0709.1528 · pith_short_12: 4QRTQMDB5PUE · pith_short_16: 4QRTQMDB5PUETWZY · pith_short_8: 4QRTQMDB

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/4QRTQMDB5PUETWZYODOKKJMZFZ \
  | 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: e423383061ebe849db3870dca525992e4d109877c05c99e7bc5417742c78ef3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "243b59b01a6e0766fdd37a193d1b525557e418f6fb7f56dd065821736eab0f00",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-09-11T05:04:06Z",
    "title_canon_sha256": "87044232a62fcc09466a6e6502a8a2f8f43f361880043add3494c8382eb1696b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0709.1528",
    "kind": "arxiv",
    "version": 1
  }
}