Pith Number

pith:MDQ6UJZN

pith:2021:MDQ6UJZNOMERP4TYV4P4BLSMM2

not attested not anchored not stored refs pending

Non-detection of Helium in the upper atmospheres of TRAPPIST-1b, e and f

Adam Kowalski, Akitoshi Ueda, Andrea Lin, Andrew J. Metcalf, Arpita Roy, Brett Morris, Bunei Sato, Caleb I. Ca\~nas, Chad F. Bender, Christian Schwab, Eric Gaidos, Fred Hearty, Gu{\dh}mundur Stef\'ansson, Hiroki Harakawa, Joe P. Ninan, John Wisniewski, Jun Nishikawa, Klaus Hodapp, Leslie Hebb, Marissa Maney, Masashi Omiya, Masayuki Kuzuhara, Mihoko Konishi, Motohide Tamura, Paul Robertson, Ravi Kopparapu, Samuel Halverson, Scott A. Diddams, S\'ebastien Vievard, Shane Jacobson, Shubham Kanodia, Suvrath Mahadevan, Suzanne Hawley, Takashi Kurokawa, Takayuki Kotani, Takuma Serizawa, Teruyuki Hirano, Tomoyuki Kudo, Vigneshwaran Krishnamurthy, Yasunori Hori

arxiv:2106.11444 v1 · 2021-06-21 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MDQ6UJZNOMERP4TYV4P4BLSMM2}

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	2026-07-05T03:04:54.951910Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

60e1ea272d730917f278af1fc0ae4c66a005ef1ae6a8031180af957bd9b61f73

Aliases

arxiv: 2106.11444 · arxiv_version: 2106.11444v1 · doi: 10.48550/arxiv.2106.11444 · pith_short_12: MDQ6UJZNOMER · pith_short_16: MDQ6UJZNOMERP4TY · pith_short_8: MDQ6UJZN

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/MDQ6UJZNOMERP4TYV4P4BLSMM2 \
  | 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: 60e1ea272d730917f278af1fc0ae4c66a005ef1ae6a8031180af957bd9b61f73

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "38a1cbdaf8b28e97bdc4b90cc18c649943ce29a9fdbcfb7c8e16b3bc77484f2c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2021-06-21T23:06:18Z",
    "title_canon_sha256": "3340bb6f376e569fdf53422d24d503434795ba3d50c8b5c102666306ec4a60ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2106.11444",
    "kind": "arxiv",
    "version": 1
  }
}