Pith Number

pith:FITJJRR2

pith:2013:FITJJRR2ZTDJDKYQQPAIICEKSI

not attested not anchored not stored refs pending

NuSTAR detection of the blazar B2 1023+25 at redshift 5.3

A. Rau, C.J. Hailey, C.M. Urry, D. Stern, F. E. Chirstensen, F. Harrison, G. Ghisellini, G.M. Madejski, G. Tagliaferri, J. Greiner, M. Balokovic, M. Nardini, M. Perri, P. Giommi, P. Schady, S.E. Boggs, S. Puccetti, T. Hovatta, T. Sbarrato, V. Sudilovsky, W.N. Brandt, W.W. Zhang

arxiv:1309.3280 v1 · 2013-09-12 · 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{FITJJRR2ZTDJDKYQQPAIICEKSI}

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	2026-05-18T01:47:42.464202Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2a2694c63accc691ab1083c084088a92273e28b789e51292ac8f37c3b6cdcb09

Aliases

arxiv: 1309.3280 · arxiv_version: 1309.3280v1 · doi: 10.48550/arxiv.1309.3280 · pith_short_12: FITJJRR2ZTDJ · pith_short_16: FITJJRR2ZTDJDKYQ · pith_short_8: FITJJRR2

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/FITJJRR2ZTDJDKYQQPAIICEKSI \
  | 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: 2a2694c63accc691ab1083c084088a92273e28b789e51292ac8f37c3b6cdcb09

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a1b691083cf3bcbce0968d178c0927d810060c837e4578fc1a23951f8089d66e",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-09-12T20:00:08Z",
    "title_canon_sha256": "531e87a59d559b6cd366ff0264041ecc90322f00f517d0cf9c8ca02a413147d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.3280",
    "kind": "arxiv",
    "version": 1
  }
}