Pith Number

pith:E4BXKO5M

pith:2009:E4BXKO5MSUEOOCT7RSHE4SGK2B

not attested not anchored not stored refs pending

PKS 1502+106: a new and distant gamma-ray blazar in outburst discovered by the Fermi Large Area Telescope

The Fermi LAT collaboration, the Multifrequency Campaing Collaboration

arxiv:0912.4029 v2 · 2009-12-20 · astro-ph.HE · astro-ph.CO · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E4BXKO5MSUEOOCT7RSHE4SGK2B}

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	2026-05-18T03:48:01.768122Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2703753bac9508e70a7f8c8e4e48cad079d70d1747f22db002714014f2dce2f8

Aliases

arxiv: 0912.4029 · arxiv_version: 0912.4029v2 · doi: 10.48550/arxiv.0912.4029 · pith_short_12: E4BXKO5MSUEO · pith_short_16: E4BXKO5MSUEOOCT7 · pith_short_8: E4BXKO5M

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/E4BXKO5MSUEOOCT7RSHE4SGK2B \
  | 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: 2703753bac9508e70a7f8c8e4e48cad079d70d1747f22db002714014f2dce2f8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "45e29b60be2a8f8b97519552703f290ac33822bf4cd2002fcae41a11e89efa37",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-12-20T17:05:15Z",
    "title_canon_sha256": "19bab9bf88db344ea6dd81046002ec3bde5c354e97ee3d1445b0f4ab276f2cec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.4029",
    "kind": "arxiv",
    "version": 2
  }
}