Pith Number

pith:VPC72M6M

pith:2017:VPC72M6MLCLM24HK4NG4QC6HB6

not attested not anchored not stored refs pending

FUV line emission, gas kinematics, and discovery of [Fe XXI] $\lambda$1354.1 in the sightline towards a filament in M87

Michael E. Anderson, Rashid Sunyaev

arxiv:1712.07535 v2 · 2017-12-20 · astro-ph.GA · 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{VPC72M6MLCLM24HK4NG4QC6HB6}

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	2026-05-18T00:04:17.724447Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

abc5fd33cc5896cd70eae34dc80bc70f954c5c77e665b5aef551044775af4fbd

Aliases

arxiv: 1712.07535 · arxiv_version: 1712.07535v2 · doi: 10.48550/arxiv.1712.07535 · pith_short_12: VPC72M6MLCLM · pith_short_16: VPC72M6MLCLM24HK · pith_short_8: VPC72M6M

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/VPC72M6MLCLM24HK4NG4QC6HB6 \
  | 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: abc5fd33cc5896cd70eae34dc80bc70f954c5c77e665b5aef551044775af4fbd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ed3fc36afbbf383bb4bffeb4dfa614cab2748b9c3f4e1b3c3d5d7c1c01eebd6",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2017-12-20T15:44:45Z",
    "title_canon_sha256": "1c74291e26825468768bd23e0efff650c7124c0eb4b81c31ed9d7152188f09ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.07535",
    "kind": "arxiv",
    "version": 2
  }
}