Pith Number

pith:PAAZY2T2

pith:2001:PAAZY2T22HXVEGHBOUPVRXUC3T

not attested not anchored not stored refs pending

The blazar GB1428+4217: a warm absorber at z=4.72?

(2) S.I.S.S.A. Trieste, (3) O.A.B. Merate, A. Celotti (2), A. C. Fabian (1), G. Ghisellini (3) ((1) I.o.A. Cambridge, Italy, Italy), K. Iwasawa (1), UK

arxiv:astro-ph/0101288 v1 · 2001-01-17 · 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{PAAZY2T22HXVEGHBOUPVRXUC3T}

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	2026-07-04T15:49:47.600424Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

78019c6a7ad1ef5218e1751f58de82dcffd77a0cabf5f502fdcea3ce9ee06be3

Aliases

arxiv: astro-ph/0101288 · arxiv_version: astro-ph/0101288v1 · doi: 10.48550/arxiv.astro-ph/0101288 · pith_short_12: PAAZY2T22HXV · pith_short_16: PAAZY2T22HXVEGHB · pith_short_8: PAAZY2T2

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/PAAZY2T22HXVEGHBOUPVRXUC3T \
  | 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: 78019c6a7ad1ef5218e1751f58de82dcffd77a0cabf5f502fdcea3ce9ee06be3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "776c6a8ac7f2c4aaeabf846f976ea6a271d898fee3e0510249020fe95dc688f6",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-01-17T12:18:03Z",
    "title_canon_sha256": "7b8dc9e55ddbd0b627258a7bcfb83aa7c116d970670af453598df0931e212336"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0101288",
    "kind": "arxiv",
    "version": 1
  }
}