Pith Number

pith:HZ3WXX7M

pith:2018:HZ3WXX7MXC3VZZLDXU2PDJNXRS

not attested not anchored not stored refs pending

A headless tadpole galaxy: the high gas-phase metallicity of the ultra-diffuse galaxy UGC 2162

2), 2) ((1) Instituto de Astrofisica de Canarias, (2) Departamento de Astrofisica, (3) IBM Research Division, (4) Department of Physics & Astronomy, (5) Center for Astrophysics, 6), (6) Departamento de Engenharia Fisica, (7) Instituto de Astrofisica de Andalucia - CSIC, A. Olmo-Garcia (1, B. G. Elmegreen (3), C. Munoz-Tunon (1, D. M. Elmegreen (4), E. Perez-Montero (7), Faculdade de Engenharia, Granada, Gravitation - CENTRA/SIM Departamento de Fisica, Instituto Superior Tecnico, J. Roman (1, J. Sanchez Almeida (1, M. Filho (5, NY, Portuga, Portugal, Spain, Spain), T.J. Watson Research Center, Universidad de La Laguna, Universidade de Lisboa, Universidade do Porto, USA, Vassar College

arxiv:1810.08453 v1 · 2018-10-19 · 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{HZ3WXX7MXC3VZZLDXU2PDJNXRS}

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	2026-05-17T23:58:01.963364Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3e776bdfecb8b75ce563bd34f1a5b78c87fcc34e2c976d697f4f003ae1c9b60e

Aliases

arxiv: 1810.08453 · arxiv_version: 1810.08453v1 · doi: 10.48550/arxiv.1810.08453 · pith_short_12: HZ3WXX7MXC3V · pith_short_16: HZ3WXX7MXC3VZZLD · pith_short_8: HZ3WXX7M

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/HZ3WXX7MXC3VZZLDXU2PDJNXRS \
  | 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: 3e776bdfecb8b75ce563bd34f1a5b78c87fcc34e2c976d697f4f003ae1c9b60e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cbb37e651ca2b2cb2b280188f7ec6bfef2e303ccfbf4d47be3c997047c79a84d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-10-19T12:06:46Z",
    "title_canon_sha256": "c3e561a5f454d7736c1517ee0e6e295d29edf03852b6bcd8ff0285c1bb42b477"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.08453",
    "kind": "arxiv",
    "version": 1
  }
}