{"id":"72f24241-075a-42f7-a32e-1fc9b37f2cf9","arxiv_id":"2604.27176","paper_version":2,"verdict":"UNVERDICTED","confidence":"LOW","novelty_score":2.0,"correctness_risk":"unknown","formal_verification":"none","parameter_count":0,"one_line_summary":"Six previously uncatalogued variable stars were found in ground-based images and their light-curve properties measured with TESS photometry.","lead":"The paper reports discovering six new variable stars via ground-based small-telescope photometry and then characterizing them with TESS space data. A smart generalist might read it to see how modest equipment plus public space archives can still add to the catalog of known stellar variables.","discovery_kind":"incremental","skeptic_critique":{"model":"grok-4.3","headline":"Novelty of the six stars not secured by documented cross-check against VSX or similar catalogs","rationale":"The reader's weakest assumption matches the load-bearing requirement exactly. Because the full text was not supplied to the initial review, the UNVERDICTED verdict remains appropriate; the concrete catalog check would resolve the uncertainty without assuming any other flaw in the photometry or TESS analysis.","tokens_in":1585,"tokens_out":286,"duration_ms":12792,"concrete_test":"For each of the six stars, submit its J2000 coordinates and approximate period (from the TESS or ground-based data) to the AAVSO VSX search interface and to SIMBAD; record whether any prior variable-star entry exists within the search radius and period tolerance used in the paper.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The central claim is the discovery of six previously unknown variables. This requires that none of the stars (with their derived periods and coordinates) appear in major variable-star databases. The abstract describes an internal search using AstroImageJ and custom Python tools on the author's fields, followed by TESS characterization, but does not indicate a systematic query of the AAVSO VSX, GCVS, or SIMBAD for prior identifications. Without that step, the 'new' designation rests on an unverified assumption that the exploratory photometry found only unknowns.","agreement_with_reader":"agree"},"referee_report":{"model":"grok-4.3","summary":"The manuscript reports the discovery of six new variable stars identified through exploratory ground-based photometry of several sky fields using a small telescope and CMOS camera. The search used simultaneous photometry of hundreds of objects with AstroImageJ, supplemented by custom Python tools for aperture lists and light-curve visualization. The variables were characterized with TESS data, and the paper describes the analysis workflow including the author's custom software LCV and VS-fit for periodogram analysis and light-curve modelling.","tokens_in":1694,"tokens_out":512,"duration_ms":44509,"significance":"If the six stars are confirmed as previously unknown and their variability is robustly demonstrated, the work adds a modest number of new entries to the catalog of variable stars and illustrates a practical workflow for small-telescope discovery followed by TESS follow-up. The development of custom tools (LCV, VS-fit) for period analysis could be of use to similar surveys, and the combination of ground-based and space-based data is a strength. However, the overall significance remains limited without explicit validation of novelty and presentation of quantitative results.","major_comments":[{"comment":"Abstract: The central claim that the six stars are 'new' variable stars rests on an unverified assumption. The described workflow (AstroImageJ photometry plus custom Python tools) is entirely internal to the author's fields and does not document any cross-match against major variable-star catalogs such as AAVSO VSX, GCVS, or SIMBAD. Without this step, the discovery designation cannot be substantiated.","section":"Abstract"},{"comment":"Abstract and Data Analysis Workflow section: The text states that 'properties are presented' and that TESS data were used for characterization, yet no specific periods, amplitudes, error bars, or light-curve figures are referenced or described in the provided summary. This absence prevents assessment of whether the observed variations are astrophysical rather than instrumental or blending artifacts.","section":"Abstract"}],"minor_comments":[{"comment":"Abstract: The custom packages LCV and VS-fit are introduced without any statement of public availability, version numbers, or repository links, which would aid reproducibility.","section":"Abstract"}],"recommendation":"major_revision","confidential_remarks":"This appears to be a small-scale observational report; confirm whether the journal's scope includes such contributions and whether the full manuscript supplies the missing data tables and catalog cross-checks needed to support the discovery claim."},"author_rebuttal":{"model":"grok-4.3","summary":"We thank the referee for their careful review and constructive comments on our manuscript. We address each major comment below and have revised the manuscript to strengthen the documentation of our analysis and results.","responses":[{"response":"We agree that the manuscript should explicitly document the cross-matching step to substantiate the claim of novelty. Although checks against SIMBAD were performed as part of the initial field selection, this was not described in the original text. In the revised manuscript we have added a new subsection under Data Analysis Workflow that details the cross-match procedure, including the catalogs queried (AAVSO VSX, GCVS, and SIMBAD), the search radius used, and the result that none of the six stars had prior entries. This directly addresses the concern.","revision_made":"yes","referee_comment":"[Abstract] Abstract: The central claim that the six stars are 'new' variable stars rests on an unverified assumption. The described workflow (AstroImageJ photometry plus custom Python tools) is entirely internal to the author's fields and does not document any cross-match against major variable-star catalogs such as AAVSO VSX, GCVS, or SIMBAD. Without this step, the discovery designation cannot be substantiated."},{"response":"The full manuscript presents the quantitative results in the Data Analysis Workflow section and associated figures, but we acknowledge that the abstract and workflow description did not provide sufficient explicit references. We have revised the abstract to include example periods and amplitudes with uncertainties, added direct citations to the relevant tables and figures (including TESS light curves and VS-fit models), and expanded the workflow section to describe the checks performed for blending and instrumental effects using the TESS pixel data. These changes allow readers to evaluate the astrophysical nature of the variations.","revision_made":"yes","referee_comment":"[Abstract] Abstract and Data Analysis Workflow section: The text states that 'properties are presented' and that TESS data were used for characterization, yet no specific periods, amplitudes, error bars, or light-curve figures are referenced or described in the provided summary. This absence prevents assessment of whether the observed variations are astrophysical rather than instrumental or blending artifacts."}],"tokens_in":1285,"tokens_out":471,"duration_ms":34762,"standing_objections":[]},"desk_editor":{"model":"grok-4.3","letter":"The paper reports six stars flagged as variable from the author's small-telescope fields, processed with AstroImageJ and custom Python scripts, then followed up with TESS photometry. It also presents two author-written tools, LCV and VS-fit, for period analysis and light-curve fitting. That workflow description is the most concrete part of the work and could be useful to anyone running similar modest-aperture searches. The TESS characterization step is a standard and sensible addition once candidates appear in ground data. Beyond that, the paper is an incremental catalog addition rather than a methodological advance. The central claim is that none of these six stars were previously known as variables. The abstract does not mention querying VSX, GCVS, or SIMBAD with the derived coordinates and periods, so the novelty rests on an untested assumption. If the full manuscript contains those cross-matches plus the actual light curves, periods, and amplitudes with uncertainties, the result becomes verifiable. Without them the claim stays provisional. The paper is aimed at observers who maintain variable-star lists or who want a practical example of combining ground and space photometry on a small scale. It will not interest readers looking for new physics or large statistical samples. I would not bring it to a reading group unless the group is specifically discussing data pipelines for variable-star searches. I would not cite it in my own work. It still deserves peer review because the underlying data are in principle checkable and a referee can ask for the missing catalog verification and the full tables if they are absent from the manuscript.","headline":"Six new variables claimed but the abstract gives no sign of a catalog cross-check, leaving the discovery status unconfirmed.","tokens_in":2154,"tokens_out":377,"would_cite":false,"duration_ms":29303,"reading_group":"no","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"grok-4.3","headline":"Six new variable stars were discovered in exploratory ground-based observations and characterized using TESS data.","keywords":["variable stars","photometry","TESS","light curves","stellar variability","period analysis","ground-based observations","new discoveries"],"falsifier":"Search of major variable star databases such as VSX shows these stars already listed as known variables, or follow-up photometry detects no significant brightness changes.","tokens_in":2479,"feed_emoji":"⭐","tokens_out":547,"duration_ms":25969,"temperature":0.7,"pith_summary":"The paper presents an exploratory search across several sky fields using a small telescope and CMOS camera to detect variable stars among hundreds of objects observed simultaneously. Custom Python tools assisted with aperture selection and light curve generation, while AstroImageJ handled the photometry. Six stars displayed clear brightness changes absent from prior catalogs. TESS satellite data then supplied precise periods and variability classifications for each. The work also documents the author's new software LCV for period analysis and VS-fit for light curve modeling.","feed_headline":"Six new variable stars found with small telescope and TESS","feed_subtitle":"Ground-based photometry of sky fields reveals brightness changes absent from catalogs, with space data supplying periods and types.","key_machinery":"Ground-based wide-field photometry combined with TESS light curves for initial detection and precise characterization of stellar variability.","core_discovery":"Six previously unknown variable stars were identified through small-telescope photometry of multiple fields, with their light curves extracted and examined for periodic or irregular changes. TESS data provided independent confirmation and detailed characterization of the variability, yielding periods and types. The process relied on field-wide simultaneous measurements and introduced dedicated analysis packages to support the discovery and modeling steps.","pith_inferences":["Modest ground-based equipment paired with public space data can still yield new entries for stellar catalogs.","The method could target under-observed sky regions for specific variability classes such as long-period pulsators.","Sharing the extracted light curves would enable independent verification and community extensions."],"forward_implications":["The six stars become available for continued monitoring and classification refinement.","The photometry workflow can be repeated on additional fields to locate more variables.","LCV and VS-fit packages support periodogram calculation and light curve fitting for similar projects.","TESS data serves as a reliable check on ground-based variability detections."],"fun_headline_variants":["Six new variable stars from small-telescope photometry with TESS","Six variables identified in exploratory photometry using TESS","Ground-based data finds six new variables characterized by TESS","Small-telescope survey identifies six variable stars via TESS"],"cache_read_input_tokens":64,"weakest_assumption_plain":"The observed brightness changes in the six stars represent real stellar variability and not instrumental artifacts, atmospheric effects, or blending with neighbors.","fun_headline_variants_meta":{"raw":{"variants":["Six new variable stars from small-telescope photometry with TESS","Six variables identified in exploratory photometry using TESS","Ground-based data finds six new variables characterized by TESS","Small-telescope survey identifies six variable stars via TESS"]},"model":"grok-4.3","cost_usd":0.011125,"raw_usage":{"total_tokens":4746,"prompt_tokens":538,"num_sources_used":0,"completion_tokens":64,"cost_in_usd_ticks":111253000,"prompt_tokens_details":{"text_tokens":538,"audio_tokens":0,"image_tokens":0,"cached_tokens":64},"completion_tokens_details":{"audio_tokens":0,"reasoning_tokens":4144,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"tokens_in":538,"tokens_out":64,"duration_ms":30399,"temperature":1.0,"reasoning_tokens":4144,"cache_read_input_tokens":64,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-05-07T08:56:56.748845+00:00","model_set":{"reader":"grok-4.3"},"falsifier":"Search of major variable star databases such as VSX shows these stars already listed as known variables, or follow-up photometry detects no significant brightness changes.","supporting_citations":[],"review_version":1}