Pith Number

pith:XTLJ32UE

pith:2019:XTLJ32UEJGQDOR53YPAY6UE2TI

not attested not anchored not stored refs pending

Calibration of ALMA as a phased array: ALMA observations during the 2017 VLBI campaign

Ciriaco Goddi, Dirk Petry, Ed Fomalont, Eric Villard, Geoff Crew, Helge Rottmann, Hugo Messias, Ivan Marti-Vidal, Jan Wagner, Lindy Blackburn, Lynn D. Matthews, Maciek Wielgus, Michael Jan{\ss}en, Neil Phillips, Remo Tilanus, Ruben Herrero-Illana, Violette Impellizzeri

arxiv:1901.09987 v2 · 2019-01-28 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XTLJ32UEJGQDOR53YPAY6UE2TI}

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	2026-05-17T23:43:03.640451Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bcd69dea8449a03747bbc3c18f509a9a0a7f597f854417d3394fd18a2d995908

Aliases

arxiv: 1901.09987 · arxiv_version: 1901.09987v2 · doi: 10.48550/arxiv.1901.09987 · pith_short_12: XTLJ32UEJGQD · pith_short_16: XTLJ32UEJGQDOR53 · pith_short_8: XTLJ32UE

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/XTLJ32UEJGQDOR53YPAY6UE2TI \
  | 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: bcd69dea8449a03747bbc3c18f509a9a0a7f597f854417d3394fd18a2d995908

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa1e9e753d140c3d1d72b486d59a6f7c3f433b1fd04d8e42fb5c9e610267f538",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2019-01-28T20:36:06Z",
    "title_canon_sha256": "98fb2dfb5a628818d8850ec6ef11ed84c613ae61b9a0e6311fd3d2bed9e371b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.09987",
    "kind": "arxiv",
    "version": 2
  }
}