Pith Number

pith:SPR2ZQN4

pith:2017:SPR2ZQN46PGTUYB6BZ7PHWG4U3

not attested not anchored not stored refs pending

HST Detection of Extended Neutral Hydrogen in a Massive Elliptical at z = 0.4

2), (2) Carnegie Obs., (3) U. Arizona), Ann Zabludoff (3) ((1) U. Chicago, Fakhri S. Zahedy (1, Hsiao-Wen Chen (1), Michael Rauch (2)

arxiv:1709.01563 v1 · 2017-09-05 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SPR2ZQN46PGTUYB6BZ7PHWG4U3}

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	2026-05-18T00:34:46.093560Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93e3acc1bcf3cd3a603e0e7ef3d8dca6d886e64f34b90270434b9d33814628f4

Aliases

arxiv: 1709.01563 · arxiv_version: 1709.01563v1 · doi: 10.48550/arxiv.1709.01563 · pith_short_12: SPR2ZQN46PGT · pith_short_16: SPR2ZQN46PGTUYB6 · pith_short_8: SPR2ZQN4

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/SPR2ZQN46PGTUYB6BZ7PHWG4U3 \
  | 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: 93e3acc1bcf3cd3a603e0e7ef3d8dca6d886e64f34b90270434b9d33814628f4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bedeba897ee1007384eafd0cdb062377768bc4626331e6a1324e71b1ee4982b3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2017-09-05T19:28:47Z",
    "title_canon_sha256": "4a23cc9956cd2e47d01ea089cbf72985ff503e94aa1701f204c0aa956bc6e85e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.01563",
    "kind": "arxiv",
    "version": 1
  }
}