Pith Number

pith:EQJZNFV5

pith:2009:EQJZNFV57HJU3EJSEBQUUM33VF

not attested not anchored not stored refs pending

Lorentz Factor Constraint from the very early external shock of the gamma-ray burst ejecta

Tsvi Piran, Yuan-Chuan Zou

arxiv:0908.4418 v1 · 2009-08-30 · astro-ph.HE · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EQJZNFV57HJU3EJSEBQUUM33VF}

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	2026-05-18T02:12:12.878143Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

24139696bdf9d34d913220614a337ba960837be8957e29da3456abac1027fcb6

Aliases

arxiv: 0908.4418 · arxiv_version: 0908.4418v1 · doi: 10.48550/arxiv.0908.4418 · pith_short_12: EQJZNFV57HJU · pith_short_16: EQJZNFV57HJU3EJS · pith_short_8: EQJZNFV5

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/EQJZNFV57HJU3EJSEBQUUM33VF \
  | 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: 24139696bdf9d34d913220614a337ba960837be8957e29da3456abac1027fcb6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "581d7cac52624507c1b9f5f222551dff69487033deb258e6a4ca7d24900c7265",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-08-30T20:00:10Z",
    "title_canon_sha256": "b07db62d2b71988b8f1cecd7088a34a9599896773d53d5939538e696d431c22b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.4418",
    "kind": "arxiv",
    "version": 1
  }
}