Pith Number

pith:6HTYYN2G

pith:2001:6HTYYN2GCLD5ZSUM6JXVLWE62O

not attested not anchored not stored refs pending

VLBA Observations of Astrometric Reference Sources in the Galactic Center

Donald C. Backer & Richard A. Sramek, Geoffrey C. Bower

arxiv:astro-ph/0105016 v1 · 2001-05-01 · 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{6HTYYN2GCLD5ZSUM6JXVLWE62O}

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	2026-05-18T01:07:45.905494Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f1e78c374612c7dcca8cf26f55d89ed3a87859ff0cdb7d15a2fed7b56ad67043

Aliases

arxiv: astro-ph/0105016 · arxiv_version: astro-ph/0105016v1 · doi: 10.48550/arxiv.astro-ph/0105016 · pith_short_12: 6HTYYN2GCLD5 · pith_short_16: 6HTYYN2GCLD5ZSUM · pith_short_8: 6HTYYN2G

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/6HTYYN2GCLD5ZSUM6JXVLWE62O \
  | 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: f1e78c374612c7dcca8cf26f55d89ed3a87859ff0cdb7d15a2fed7b56ad67043

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d531b5bc685e0ea48051173b5d9892ad0b8b196993995b016df6a0e4ca0fb69",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-05-01T23:17:40Z",
    "title_canon_sha256": "34e7a07c054b3d128d805ee03c03c4f545c627a83df11ed86c6fa1c413d85ff9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0105016",
    "kind": "arxiv",
    "version": 1
  }
}