Pith Number

pith:BUNXYOIN

pith:2008:BUNXYOINRMC57ARPRM4BBDFH54

not attested not anchored not stored refs pending

An Approach Detecting the Event Horizon of Sgr A*

Jose K. Ishituka, Makoto Miyoshi, Rohta Takahashi, Seiji Kameno, Shinji Horiuchi, Zhi-Qiang Shen

arxiv:0809.3548 v1 · 2008-09-21 · 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{BUNXYOINRMC57ARPRM4BBDFH54}

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	2026-07-04T15:14:30.226401Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d1b7c390d8b05df822f8b38108ca7ef2bbe5c0fc94d16564cca760a05fe8432

Aliases

arxiv: 0809.3548 · arxiv_version: 0809.3548v1 · doi: 10.48550/arxiv.0809.3548 · pith_short_12: BUNXYOINRMC5 · pith_short_16: BUNXYOINRMC57ARP · pith_short_8: BUNXYOIN

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/BUNXYOINRMC57ARPRM4BBDFH54 \
  | 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: 0d1b7c390d8b05df822f8b38108ca7ef2bbe5c0fc94d16564cca760a05fe8432

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "29f1c3e6c3a9599cc3a5d44a5eaadb436221bb02911c2a70bdf65f6606c508b3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-09-21T05:02:55Z",
    "title_canon_sha256": "6dc0864018dca2efada72924d89372d5f4029fbce300f7ea28677406d54f0299"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.3548",
    "kind": "arxiv",
    "version": 1
  }
}