Pith Number

pith:OMMD2HZY

pith:2021:OMMD2HZYL7RRHPUX74OSI74XB7

not attested not anchored not stored refs pending

The Study of X-Ray Flux Variability of M87

Hiromitsu Takahashi, Ryo Imazawa, Yasushi Fukazawa

arxiv:2109.01542 v2 · 2021-09-03 · 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{OMMD2HZYL7RRHPUX74OSI74XB7}

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	2026-07-05T03:19:21.494099Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73183d1f385fe313be97ff1d247f970fe11c6b0dd5d0213f688587d25e90ac6a

Aliases

arxiv: 2109.01542 · arxiv_version: 2109.01542v2 · doi: 10.48550/arxiv.2109.01542 · pith_short_12: OMMD2HZYL7RR · pith_short_16: OMMD2HZYL7RRHPUX · pith_short_8: OMMD2HZY

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/OMMD2HZYL7RRHPUX74OSI74XB7 \
  | 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: 73183d1f385fe313be97ff1d247f970fe11c6b0dd5d0213f688587d25e90ac6a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "38ee3805095013af2ca70eeb285d520f7c9751b9edbe35557908f6bea0247cc4",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2021-09-03T14:07:15Z",
    "title_canon_sha256": "20e92ebd7301583b0562ab3fea137bda515672f15f0ebcb8faeb4c06a155bcca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.01542",
    "kind": "arxiv",
    "version": 2
  }
}