Pith Number

pith:7Z535KL2

pith:1999:7Z535KL2YQUFX24WOKDEJCVUYC

not attested not anchored not stored refs pending

HST/NICMOS Imaging of Disks and Envelopes Around Very Young Stars

David Koerner (U. of Pennsylvania), Deborah L. Padgett, Karl R. Stapelfeldt (JPL), Stephen E. Strom (NOAO), Susan Terebey (Extrasolar Research Corporation), Wolfgang Brandner (Caltech - JPL/IPAC)

arxiv:astro-ph/9902101 v1 · 1999-02-06 · 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{7Z535KL2YQUFX24WOKDEJCVUYC}

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	2026-05-18T04:25:39.495538Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fe7bbea97ac4285beb967286448ab4c0998917a5cbd0fd91a935820e939460cc

Aliases

arxiv: astro-ph/9902101 · arxiv_version: astro-ph/9902101v1 · doi: 10.48550/arxiv.astro-ph/9902101 · pith_short_12: 7Z535KL2YQUF · pith_short_16: 7Z535KL2YQUFX24W · pith_short_8: 7Z535KL2

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/7Z535KL2YQUFX24WOKDEJCVUYC \
  | 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: fe7bbea97ac4285beb967286448ab4c0998917a5cbd0fd91a935820e939460cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c81b7253d56f71d167a119a63717cdf5c785b5e27fd17e30ebed87c03ad77860",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-02-06T03:02:31Z",
    "title_canon_sha256": "1d943b4547f21aced4b3187b001c707569ca9c611b75d811f916138f58384fa8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9902101",
    "kind": "arxiv",
    "version": 1
  }
}