Pith Number

pith:PRJDZGO3

pith:2009:PRJDZGO3IXV4JQGHCZMWGJ6B45

not attested not anchored not stored refs pending

Suzaku Observation of the Diffuse X-Ray Emission from the Open Cluster Westerlund 2: a Hypernova Remnant?

Fumio Takahara (Osaka U.), Hiroaki Takahashi, Kiyoshi Hayashida, Yutaka Fujita

arxiv:0907.4750 v1 · 2009-07-27 · 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{PRJDZGO3IXV4JQGHCZMWGJ6B45}

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	2026-05-18T02:12:47.399033Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c523c99db45ebc4c0c716596327c1e75acfad96af1974aa006f805ccee2d9fb

Aliases

arxiv: 0907.4750 · arxiv_version: 0907.4750v1 · doi: 10.48550/arxiv.0907.4750 · pith_short_12: PRJDZGO3IXV4 · pith_short_16: PRJDZGO3IXV4JQGH · pith_short_8: PRJDZGO3

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/PRJDZGO3IXV4JQGHCZMWGJ6B45 \
  | 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: 7c523c99db45ebc4c0c716596327c1e75acfad96af1974aa006f805ccee2d9fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11d115dc91bb51236939dd5cb558ca1e81adc245dd2d0efa09b0960f16a48123",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-07-27T20:00:03Z",
    "title_canon_sha256": "8544e482efeb329e6f5b285d40f81170dc9502d04141e33b55a1bf1cb41d48ca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.4750",
    "kind": "arxiv",
    "version": 1
  }
}