Eijnden, J. van den

Feiler, R.

Gawronski, M.

Hessels, J.

Kirsten, F.

Nimmo, K.

Snelders, M.

Yang, J.

English

All of Fermi GBM, Konus Wind, GECAM, and Swift-BAT reported several bright bursts during the recent X-ray activity of SGR1935+2154 (GCN circulars GCN #29363, #29365, #29373, #29374, #29388 and ATel #14359)

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UvA-DARE is a service provided by the library of the University of Amsterdam (https://dare.uva.nl)UvA-DARE (Digital Academic Repository)Upper limits on the radio fluence of the most recent X-ray bursts fromSGR1935+2154Kirsten, F.; Eijnden, J. van den; Snelders, M.; Nimmo, K.; Hessels, J.; Gawronski, M.; Yang,J.; Feiler, R.Publication date2021Document VersionFinal published versionPublished inThe astronomer's telegramLink to publicationCitation for published version (APA):Kirsten, F., Eijnden, J. V. D., Snelders, M., Nimmo, K., Hessels, J., Gawronski, M., Yang, J., &Feiler, R. (2021). Upper limits on the radio fluence of the most recent X-ray bursts fromSGR1935+2154. The astronomer's telegram, 14382.https://www.astronomerstelegram.org/?read=14382General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s)and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an opencontent license (like Creative Commons).Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, pleaselet the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the materialinaccessible and/or remove it from the website. Please Ask the Library: https://uba.uva.nl/en/contact, or a letterto: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. Youwill be contacted as soon as possible.Download date:10 Mar 2023ATel #14382: Upper limits on the radio fluence of the most recent X-ray bursts from SGR1935+2154https://www.astronomerstelegram.org/?read=14382[9-5-2022 11:26:13]OutsideGCNIAUCs ATel on TwitterPatreonPost | Search | PoliciesCredential | Feeds | Email9 May 2022; 09:26 UTThis space for free for your conference.[ Previous | Next | ADS  ]Upper limits on the radio fluence of the most recent X-ray bursts from SGR1935+2154ATel #14382; Franz Kirsten (Chalmers/OSO, Sweden), Jakob van den Eijnden (U. ofOxford, England), Mark Snelders (U. of Amsterdam, The Netherlands), KenzieNimmo (ASTRON, U. of Amsterdam, The Netherlands), Jason Hessels (ASTRON,U. of Amsterdam, The Netherlands), Marcin Gawronski (NCU, Torun, Poland), JunYang (Chalmers/OSO, Sweden), Roman Feiler (NCU, Torun, Poland)on 9 Feb 2021; 20:50 UTCredential Certification: Franz Kirsten (franz.kirsten@chalmers.se)Subjects: Radio, Transient, Fast Radio Burst, MagnetarReferred to by ATel #: 14395TweetAll of Fermi GBM, Konus Wind, GECAM, and Swift-BAT reported several bright burstsduring the recent X-ray activity of SGR1935+2154 (GCN circulars GCN #29363, #29365,#29373, #29374, #29388 and ATel #14359). We were observing the source at multipleradio frequencies during the following bursts:29 Jan 2021 07:00:00.99 UTC (ATel #14359, GCN #29373)29 Jan 2021 10:35:39.94 UTC (ATel #14359)29 Jan 2021 15:23:29.92 UTC (ATel #14359)02 Feb 2021 12:54:27.00 UTC (GCN #29388)During the three bursts on 29 Jan 2021 we observed with the Westerbork (Wb) single25-m dish RT1 (P-band, 300.0-364.0 MHz) and the Onsala (O8) 25-m telescope (L-band, 1360-1488 MHz). On 2 Feb 2021 we observed also with the Torun 32-m telescope(C-band, 4550-4806 MHz) in addition to Wb and O8.We used a custom built pipeline to search the baseband recordings. This pipeline firstcreates channelised filterbank files (Stokes I) which are then searched for bursts withHeimdall (using the DM-range 332.7 +/- 50 pc/cm^3). Potential candidates are classifiedwith FETCH (Agarwal et al. 2020). Neither the automated pipeline nor a manual searcharound -10/+30 seconds of the reported X-ray burst times lead to a detection. Thus wecan constrain the fluence of any potential bursts coincident with the X-ray bursts to beRelated14396 Erratum to ATEL 1439514395 Upper limits on thecontinuum radio emission ofSGR J1935+2154 fromuGMRT observations14388 Swift observation of themagnetar SGR 1935+2154following the detection ofseveral bursts14382 Upper limits on the radiofluence of the most recent X-ray bursts fromSGR1935+215414359 Fermi GBM Observations ofSGR J1935+215413816 MWA low-frequency radioimaging of SGR 1935+215413799 Radio pulsation and imagingstudy of SGR J1935+2154with the uGMRT13777 Radio pulsation and imagingstudy of SGR J1935+2154with the uGMRT13769 A search for radio pulsationsfrom SGR J1935+215413739 Search for radio bursts fromSGR 1935+2154 at 408 MHzwith the Northern Cross13726 Arecibo search for radiobursts following a previousSGR-like activity from SGR1935+215413713 A Search for Radio Burstsand Periodic Emission fromSGR 1935+214 at High RadioFrequencies using the DeepSpace Network13707 A LOFAR high timeresolution search for radiobursts from SGR 1935+215413699 A highly polarised radioburst detected from SGR1935+2154 by FAST13684 Independent detection of theradio burst reported in ATel#13681 with STARE213681 A bright millisecond-timescale radio burst fromthe direction of the Galacticmagnetar SGR 1935+215413678 Burst forest from SGR1935+2154 as detected withNICER13675 A Forest of Bursts from SGR1935+2154ATel #14382: Upper limits on the radio fluence of the most recent X-ray bursts from SGR1935+2154https://www.astronomerstelegram.org/?read=14382[9-5-2022 11:26:13]lower than 78 Jy ms, 8 Jy ms and 3 Jy ms at P-, L-, and C-band, respectively (7-sigmadetection threshold for the automated pipeline).We also performed a preliminary analysis of the overlapping Fermi/GBM bursts on 29Jan 2021. We find that the spectral parameters, when fitting each burst with a doubleblackbody model, are consistent with typical X-ray bursts seen from SGR 1935+2154(Lin et al. 2020). They are, on the contrary, not consistent with the spectrum seen duringthe anomalous, hard X-ray burst with contemporaneous radio burst emission (Mereghettiet al. 2020). The same holds for the spectral parameters reported for the 02 Feb 2021Fermi/GBM bursts (GCN #29388). The fluences of all four X-ray bursts are similar to thatof the anomalous, hard X-ray burst; if a contemporaneous radio burst of similar fluence(1.5 MJy ms; Bochenek et al. 2020) had occurred, it would have been detected given oursensitivity.We also observed the source during the following times 30 Jan 2021 0530-1245 UTC31 Jan 2021 0530-1045 UTC01 Feb 2021 0515-1345 UTC02 Feb 2021 0430-1800 UTC03 Feb 2021 0430-1800 UTCNo radio bursts have been found as of yet. We will continue to monitor the sourceregularly.[ Telegram Index ]R. E. Rutledge, Editor-in-ChiefDerek Fox, Editor

Upper limits on the radio fluence of the most recent X-ray bursts from SGR1935+2154

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Upper limits on the radio fluence of the most recent X-ray bursts from SGR1935+2154

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