Pith Number

pith:CHAWZ7QR

pith:2012:CHAWZ7QR7HTWFDDA43FZY6J4B7

not attested not anchored not stored refs pending

Long XMM observation of the Narrow-Line Seyfert 1 galaxy IRAS13224-3809: rapid variability, high spin and a soft lag

A. C. Fabian, A. J. Young, A. Zoghbi, C. S. Reynolds, C.-Y. Chiang, D. J. Walton, D. R. Wilkins, E. Kara, E. M. Cackett, E. Nardini, G. Miniutti, G. Ponti, J. Malzac, J. M. Miller, J. Steiner, K. Lozanov, L. C. Gallo, P. Uttley, R. C. Reis, R. R. Ross, T. Boller, T. Dwelly, W. N. Brandt, Y. Tanaka

arxiv:1208.5898 v1 · 2012-08-29 · 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{CHAWZ7QR7HTWFDDA43FZY6J4B7}

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	2026-05-18T01:54:50.383695Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

11c16cfe11f9e7628c60e6cb9c793c0ffad84d1a7e34b15ffda8c2794fb85eb3

Aliases

arxiv: 1208.5898 · arxiv_version: 1208.5898v1 · doi: 10.48550/arxiv.1208.5898 · pith_short_12: CHAWZ7QR7HTW · pith_short_16: CHAWZ7QR7HTWFDDA · pith_short_8: CHAWZ7QR

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/CHAWZ7QR7HTWFDDA43FZY6J4B7 \
  | 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: 11c16cfe11f9e7628c60e6cb9c793c0ffad84d1a7e34b15ffda8c2794fb85eb3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0cbc182bf073de5f6501e58dbae44294f978e6b6f92942abdb67ec69ceda792c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-08-29T12:41:01Z",
    "title_canon_sha256": "ba07fcceb0877c89528af7884284dc8a4d4626cd591dfceaa75efcdee0c00630"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.5898",
    "kind": "arxiv",
    "version": 1
  }
}