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 General

 Manuscript preparation

General information

Title, Authors (first and family names), affiliations and e-mail addresses must be clearly indicated, we recommend the use of the ASCII character set in order to improve the compatibility with other systems

You will need to provide an arXiv article id. This is necessary for your paper to be processed correctly. Should you need any assistance, please contact the Editorial Office.

The abstract should briefly summarize the content of the contribution and must fit in the first page.

Please avoid formulae and references in the title and abstract.

At the time of submission you must characterise your work with a number of keywords selected from the JCAP keyword list. Please indicate these keywords after the abstract.

If your article is authored by a collaboration, please do not insert the whole author list in the article metadata when submitting the paper, but just the Collaboration name. Moreover, please provide the Editorial office with the Collaboration logo and institutional email, if needed.

Text and style

Please divide the text into sections. Write your work in standard, comprehensible English. Conciseness is strongly encouraged, but clarity and consistency are more important. Short and simple words and sentences are helpful for readers. Please keep jargon and acronyms to a minimum. The Editors will consider whether the content is of sufficient scientific interest compared to the overall length and may recommend ways of shortening the text (JCAP papers do not normally exceed 50 pages).

Tables, figures and multimedia

Tables and figures can be used to improve the information in the text.

Particularly large tables and figures or multimedia materials can be submitted as attachments to the contribution, by clicking the "upload attachment" button after the submission of the main files for the paper has been successfully completed. They will be made available to reviewers but, in case of acceptance, will not be typeset or transformed in any way. Authors are therefore kindly requested to use standard formats to prepare them, so that editors, referees and readers will be able to view them. SISSA Medialab and IOP bear no responsibility for uncommon formats, viruses and other problems that may arise.

References

JCAP uses the sequential numerical system for references in the text. The sequential numbers occur within square brackets, and the reference list at the end of the preprint lists the references in numerical order, not alphabetically. Please write the reference as in the following example:

 Z. Haiman and G.P. Holder, The reionization history at high redshifts. 1. Physical models and new constraints from CMB polarization, Astrophys. J. 595 (2003) 1 [astro-ph/0302403]

JCAP strongly encourages citations to data files and similar supplementary material available in external repositories. Citations should follow the repository style (i.e, the “cite as” notice) and should include persistent identifiers such as DOIs wherever possible.
Correct citations allow for proper tracking, attribution and recognition apart from increasing discovery & further citations.

Data/Software/Code Availability Statements should be included at the end of articles submitted to JCAP to improve their discoverability.

 File preparation

 Manuscripts must be prepared in TeX/LaTeX and will be automatically transformed by the system into PDF files.

 TeX and LaTeX Your contribution can be one of the following: a single .tex file a file archive (a zipped or a gzipped tar archive) If your preprint includes more than one file, the files will have to be archived. In this case it is essential for the master file to be saved in the root (main) directory, while the other files may be included in subdirectories. Please note that if two or more source files have the same extension (i.e. "abc.tex" and "def.tex"), in making the submission you must specify the master file name together with the extension in the appropriate field, otherwise the submission will fail. a file or archive plus attachments (additional figures, large tables, videos etc.). In this case an additional step will be requested of you when you see the upload confirmation screen ("submission report"). Please click on the button "upload attachment" (at the bottom of the page), and you will be able to recursively upload additional material. These will be viewed as separate file attachments throughout the review procedure and on the paper's publication. Manuscripts should be preferably prepared in LaTeX using the LaTeX class article or the JCAP style class. Preprints preared with different styles are also accepted, but are inevitably processed more slowly after acceptance. In any case, you should try to use standard packages. Please see the next section for some general tips. Some frequently used macro packages, (i.e.: aastex, elsart, feynman, harvmac, lanlmac, j-phys, phyzzx and revtex), even if old and/or deprecated, are installed at the JCAP site, in addition to the standard TeX inputs. If you are using an unrecognised package, please include it in the submission. Always consider that the submission can be completed only if your file compiles successfully on the JCAP server. If you have used BibTeX, you must include the .bbl file. The .bib file may also help. We accept figures in the follwing formats: .ps, .eps and .jpg, .png, .pdf. During the compilation process we try to produce .pdf files. If your images are only in the .ps or .eps format then we first we produce a .dvi file and next we gnenerate a .pdf file from it. Otherwise the compilation produces a .pdf file directly. If you use packages like feynmf that require the use of metafont please include the .pk, .tfm and .t1, .t2, ..., files in your archive. Please include the .gls file if you use the glossaries package. If the document consists of a stand-alone (La)TeX file this alone can be submitted as it is, without compressing it. LaTeX tips We often see the same errors perpetrated by habit and copy-paste techniques. Here are some tips that we hope will help you to write better LaTeX. Please avoid common mistakes. A very nice and short document with such errors can be read with texdoc l2tabuen (or here). Please read it. Keep in mind that the typesetting issues that you encounter have probably already been solved by someone else. Look for existing solutions before reinventing the wheel (sub-equations, proofs environments, small inline matrices,...). If your search does not yield results, feel free to ask to any TeX user group. They are helpful and good. Also check out StackExchange. Please leave margins, font, styling of sections, captions, references alone (i.e. no "\caption{\small ...}" or "\section{\it ...}" etc.). Try to keep the preamble as simple and clean as possible: do not copy paste from other tex files huge macro lists that you do not use, that overwrite already existing commands and that redefine the same thing multiple times. The same goes for packages: do not load packages that you do not use. Especially, do not use obsolete packages (if in doubt, comment the \usepackage and see what happens). Do not use \def. Do not use \def. The above is not an error, it's a repetition: do not use \def! Be aware that certain command have arguments, but other are switches: they change something but do not have arguments (e.g. do not confuse \textbf{} with {\bfseries}). See the last tip. You must know these packages: amsmath, hyperref, graphicx. Please read the compilation log. Certains LaTeX IDE/editors may hide it. Read the warnings but especially the errors. "Encoding" is a complex subject. If in doubt, stick to us-ascii or utf-8. Read the Manual. If all else fails, please read some documentation on TeX/LaTeX. The very minimum should be A short introduction to LaTeX2e. Other good starting points might be wikipedia and overleaf documentation. Archive preparation (.tar.gz) Put all the files that make up your article in a folder. The folder is called paper in our example. To create a .tar.gz file issue these commands from a terminal: $cd paper/$ tar -cvzf article.tar.gz * You will find the file article.tar.gz inside the folder.

 Submission

 Coauthors

 The preprint web page

 As soon as a new contribution is submitted to JCAP, a preprint number is assigned and the preprint appears in the section "Waiting for editor's decision". The preprint number identifies your contribution throughout the editorial procedure, and is required for any correspondence with the JCAP Editorial Office. Figure 1. The preprint number To access the preprint web page of a particular document, you should: Sign in to the JCAP website at SISSA Medialab (jcap.sissa.it) Click on "my Author pages" The preprints still in progress are in the "pending papers" page divided into sections according to their status. The preprint web page for a particular preprint contains all the information about that preprint, except for confidential data (i.e., editor and referee names). From the preprint web page, you can perform the following actions: check the status of the preprint and the progress of the editorial procedure download the preprint itself in PDF format communicate with the Editor and the Editorial Office read and download the report submit the revised version of the preprint, if requested by the editor