Pith Number

pith:4ZJYKRDN

pith:2009:4ZJYKRDNTLHKTUQSUOLWZBQ4GW

not attested not anchored not stored refs pending

Discovery of very high energy gamma rays from PKS 1424+240 and multiwavelength constraints on its redshift

D. M. Terndrup, et al., S. D. Barber, The Fermi Collaboration: A. A. Abdo, The VERITAS Collaboration: V. A. Acciari

arxiv:0912.0730 v1 · 2009-12-03 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4ZJYKRDNTLHKTUQSUOLWZBQ4GW}

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	2026-05-18T01:18:48.199972Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e65385446d9acea9d212a3976c861c35a92c09d6a944e7131328e129835dcb84

Aliases

arxiv: 0912.0730 · arxiv_version: 0912.0730v1 · doi: 10.48550/arxiv.0912.0730 · pith_short_12: 4ZJYKRDNTLHK · pith_short_16: 4ZJYKRDNTLHKTUQS · pith_short_8: 4ZJYKRDN

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/4ZJYKRDNTLHKTUQSUOLWZBQ4GW \
  | 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: e65385446d9acea9d212a3976c861c35a92c09d6a944e7131328e129835dcb84

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f7791b810063e7b48fdfc0797de5e68afe9c9fac7b4be599c8699df8cc18ec71",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-03T21:10:26Z",
    "title_canon_sha256": "12136926dcfde66e856910ebd2748420b523a50bf0b2248263403592ea293aa5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.0730",
    "kind": "arxiv",
    "version": 1
  }
}