Pith Number

pith:IMNQL2VD

pith:1999:IMNQL2VDW3G7HTKYVQCWCWTWL2

not attested not anchored not stored refs pending

High Resolution VSOP Imaging of a Southern Blazar PKS 1921-293 at 1.6 GHz

(2) Institute of Space, 3), Astronautical Science, J. E. J. Lovell (2), Kanagawa (3) Academia Sinica Institute of Astronomy & Astrophysics, K. Fujisawa (1), M. Inoue (1) ((1) National Astronomical Observatory of Japan, Mitaka, P. G. Edwards (2), Sagamihara, S. Kameno (1), Taipei), Tokyo, Z.-Q. Shen (1

arxiv:astro-ph/9907167 v1 · 1999-07-13 · 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{IMNQL2VDW3G7HTKYVQCWCWTWL2}

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	2026-05-18T01:40:12.918738Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

431b05eaa3b6cdf3cd58ac05615a765e88f372fe0b71933d9755ed04ed80cc1f

Aliases

arxiv: astro-ph/9907167 · arxiv_version: astro-ph/9907167v1 · doi: 10.48550/arxiv.astro-ph/9907167 · pith_short_12: IMNQL2VDW3G7 · pith_short_16: IMNQL2VDW3G7HTKY · pith_short_8: IMNQL2VD

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/IMNQL2VDW3G7HTKYVQCWCWTWL2 \
  | 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: 431b05eaa3b6cdf3cd58ac05615a765e88f372fe0b71933d9755ed04ed80cc1f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "568a481025b280f65d03f506b8ab4dcfd012b9bdcfa07b399838210eac38bfa3",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-07-13T12:06:30Z",
    "title_canon_sha256": "cc2ec938172727fb18333c3de8bdb968c1806d2b27402713bbf977a02f0b0375"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9907167",
    "kind": "arxiv",
    "version": 1
  }
}