Coughlin, Michael W. and Ahumada, Tomás and Anand, Shreya and De, Kishalay and Hankins, Matthew J. and Kasliwal, Mansi M. and Singer, Leo P. and Bellm, Eric C. and Andreoni, Igor and Cenko, S. Bradley and Cooke, Jeff and Copperwheat, Christopher M. and Dugas, Alison M. and Jencson, Jacob E. and Perley, Daniel A. and Yu, Po-Chieh and Bhalerao, Varun and Kumar, Harsh and Bloom, Joshua S. and Anupama, G. C. and Ashley, Michael C. B. and Bagdasaryan, Ashot and Biswas, Rahul and Buckley, David A. H. and Burdge, Kevin B. and Cook, David O. and Cromer, John and Cunningham, Virginia and D’Aì, Antonino and Dekany, Richard G. and Delacroix, Alexandre and Dichiara, Simone and Duev, Dmitry A. and Dutta, Anirban and Feeney, Michael and Frederick, Sara and Gatkine, Pradip and Ghosh, Shaon and Goldstein, Daniel A. and Golkhou, V. Zach and Goobar, Ariel and Graham, Matthew J. and Hanayama, Hidekazu and Horiuchi, Takashi and Hung, Tiara and Jha, Saurabh W. and Kong, Albert K. H. and Giomi, Matteo and Kaplan, David L. and Karambelkar, V. R. and Kowalski, Marek and Kulkarni, Shrinivas R. and Kupfer, Thomas and Masci, Frank J. and Mazzali, Paolo and Moore, Anna M. and Mogotsi, Moses and Neill, James D. and Ngeow, Chow-Choong and Martínez-Palomera, Jorge and Parola, Valentina La and Pavana, M. and Ofek, Eran O. and Patil, Atharva Sunil and Riddle, Reed and Rigault, Mickael and Rusholme, Ben and Serabyn, Eugene and Shupe, David L. and Sharma, Yashvi and Singh, Avinash and Sollerman, Jesper and Soon, Jamie and Staats, Kai and Taggart, Kirsty and Tan, Hanjie and Travouillon, Tony and Troja, Eleonora and Waratkar, Gaurav and Yatsu, Yoichi (2019) GROWTH on S190425z: Searching Thousands of Square Degrees to Identify an Optical or Infrared Counterpart to a Binary Neutron Star Merger with the Zwicky Transient Facility and Palomar Gattini-IR. The Astrophysical Journal, 885 (1). L19. ISSN 2041-8213
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Abstract
The third observing run by LVC has brought the discovery of many compact binary coalescences. Following the detection of the first binary neutron star merger in this run (LIGO/Virgo S190425z), we performed a dedicated follow-up campaign with the Zwicky Transient Facility (ZTF) and Palomar Gattini-IR telescopes. The initial skymap of this single-detector gravitational wave (GW) trigger spanned most of the sky observable from Palomar Observatory. Covering 8000 deg2 of the initial skymap over the next two nights, corresponding to 46% integrated probability, ZTF system achieved a depth of ≈21 mAB in g- and r-bands. Palomar Gattini-IR covered 2200 square degrees in J-band to a depth of 15.5 mag, including 32% integrated probability based on the initial skymap. The revised skymap issued the following day reduced these numbers to 21% for the ZTF and 19% for Palomar Gattini-IR. We narrowed 338,646 ZTF transient "alerts" over the first two nights of observations to 15 candidate counterparts. Two candidates, ZTF19aarykkb and ZTF19aarzaod, were particularly compelling given that their location, distance, and age were consistent with the GW event, and their early optical light curves were photometrically consistent with that of kilonovae. These two candidates were spectroscopically classified as young core-collapse supernovae. The remaining candidates were ruled out as supernovae. Palomar Gattini-IR did not identify any viable candidates with multiple detections only after merger time. We demonstrate that even with single-detector GW events localized to thousands of square degrees, systematic kilonova discovery is feasible.
| Item Type: | Article |
|---|---|
| Subjects: | Eurolib Press > Physics and Astronomy |
| Depositing User: | Managing Editor |
| Date Deposited: | 29 May 2023 04:16 |
| Last Modified: | 02 Oct 2023 12:24 |
| URI: | http://info.submit4journal.com/id/eprint/1963 |
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