Pith Number

pith:X3IFQL4T

pith:2009:X3IFQL4TI33UUGDE5LBWB7OFKC

not attested not anchored not stored refs pending

The unusual X-ray morphology of NGC4636 revealed by deep Chandra observations: cavities and shocks created by past AGN outbursts

2), (2) INAF-Osservatorio Astronomico di Bologna, (3) Max-Planck-Institut fur Astrophysik), A. Baldi (1, C. Jones (1), E. Churazov (3), L. David (1), P. Nulsen (1), R. Kraft (1), S.Giacintucci (1) ((1) Harvard-Smithsonian Center for Astrophysics, W. Forman (1)

arxiv:0909.2942 v1 · 2009-09-16 · 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{X3IFQL4TI33UUGDE5LBWB7OFKC}

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	2026-05-18T02:11:47.457971Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bed0582f9346f74a1864eac360fdc550bc5ff047fe6a5f46a88b515baed09d8c

Aliases

arxiv: 0909.2942 · arxiv_version: 0909.2942v1 · doi: 10.48550/arxiv.0909.2942 · pith_short_12: X3IFQL4TI33U · pith_short_16: X3IFQL4TI33UUGDE · pith_short_8: X3IFQL4T

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/X3IFQL4TI33UUGDE5LBWB7OFKC \
  | 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: bed0582f9346f74a1864eac360fdc550bc5ff047fe6a5f46a88b515baed09d8c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4cdb62bc76b0dc77b732cf78d2beeba0978c50113ebc798c4b26cb4d664671e2",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-16T07:35:27Z",
    "title_canon_sha256": "65f2089d4c23af3125594d6078e7d3f232bb8c96b2ecb0d95120f1d49ccccea0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2942",
    "kind": "arxiv",
    "version": 1
  }
}