//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24934 SUBJECT: GRB 190701A: Swift detection of a burst DATE: 19/07/01 09:58:42 GMT FROM: Kim Page at U.of Leicester T. N. Ukwatta (LANL), A. P. Beardmore (U Leicester), N. J. Klingler (PSU), H. A. Krimm (NSF), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester) and A. Tohuvavohu (PSU) report on behalf of the Neil Gehrels Swift Observatory Team: At 09:45:20 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 190701A (trigger=912310). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 28.063, +58.906 which is RA(J2000) = 01h 52m 15s Dec(J2000) = +58d 54' 23" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 100 sec. The peak count rate was ~800 counts/sec (15-350 keV), at ~37 sec after the trigger. The XRT began observing the field at 09:47:41.9 UT, 141.1 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source located at RA, Dec 28.08019, 58.91005 which is equivalent to: RA(J2000) = 01h 52m 19.25s Dec(J2000) = +58d 54' 36.2" with an uncertainty of 3.7 arcseconds (radius, 90% containment). This location is 35 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper. A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 6.36 x 10^21 cm^-2 (Willingale et al. 2013). UVOT took a finding chart exposure of 150 seconds with the White filter starting 144 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the large, but uncertain, extinction expected. Burst Advocate for this burst is T. N. Ukwatta (tilan.ukwatta AT gmail.com). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/) //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24935 SUBJECT: GRB 190701A: Prompt enhanced Swift-XRT position DATE: 19/07/01 10:25:41 GMT FROM: Phil Evans at U of Leicester P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: Using promptly downlinked XRT event data for GRB 190701A, we find an enhanced XRT position of the afterglow: RA, Dec: 28.0815, 58.9095 which is equivalent to: RA (J2000) = 01 52 19.56 Dec (J2000) = +58 54 34.3 with an uncertainty of 2.1 arcseconds (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/912310. Position enhancement is is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177). This circular is an official product of the Swift-XRT team. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24937 SUBJECT: GRB 190701A: MAXI/GSC detection DATE: 19/07/01 11:55:46 GMT FROM: Motoko Serino at RIKEN/MAXI K. Setoguchi (Kyoto U.), H. Negoro, M. Nakajima, W. Maruyama, M. Aoki, K. Kobayashi (Nihon U.), S. Nakahira, T. Mihara, T. Tamagawa, M. Matsuoka (RIKEN), T. Sakamoto, M. Serino, S. Sugita, H. Nishida, A. Yoshida (AGU), Y. Tsuboi, W. Iwakiri, R. Sasaki, H. Kawai, T. Sato (Chuo U.), M. Shidatsu (Ehime U.), N. Kawai, M. Sugizaki, M. Oeda, K. Shiraishi (Tokyo Tech), S. Ueno, H. Tomida, M. Ishikawa, Y. Sugawara, N. Isobe, R. Shimomukai, M. Tominaga (JAXA), Y. Ueda, A. Tanimoto, S. Yamada, S. Ogawa, T. Yoshitake (Kyoto U.), H. Tsunemi, T. Yoneyama, K. Asakura, S. Ide (Osaka U.), M. Yamauchi, S. Iwahori, Y. Kurihara, K. Kurogi, K. Miike (Miyazaki U.), T. Kawamuro (NAOJ), K. Yamaoka (Nagoya U.), Y. Kawakubo (LSU) report on behalf of the MAXI team: The MAXI/GSC nova alert system triggered a bright uncatalogued X-ray transient source at 09:46:42 UT on July 1, 2019. Assuming that the source flux was constant over the transit, we obtain the source position at (R.A., Dec) = (27.548 deg, 58.852 deg) = (01 50 11, +58 51 06) (J2000) with a 90% C.L. statistical error of 0.16 deg and an additional systematic uncertainty of 0.1 deg (90% containment radius). Without assumptions on the source constancy, we obtain a rectangular error box for the transient source with the following corners: (25.762, 59.105) deg = (01 43 02, +59 06 17) (J2000) (25.721, 58.781) deg = (01 42 53, +58 46 51) (J2000) (29.166, 58.620) deg = (01 56 39, +58 37 11) (J2000) (29.239, 58.942) deg = (01 56 57, +58 56 31) (J2000). This position is consistent with that of GRB 190701A detected by Swift (Ukwatta et al., GCN 24934, Evans et al., GCN 24935). The X-ray flux averaged over the scan was 416 +- 39 mCrab (4.0-10.0keV, 1 sigma error). There was no significant excess flux in the previous transit at UT 08:14 and in the next transit at 11:19 UT with an upper limit of 20 mCrab for each. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24940 SUBJECT: GRB 190701A: Enhanced Swift-XRT position DATE: 19/07/01 14:48:42 GMT FROM: Phil Evans at U of Leicester J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team. Using 890 s of XRT Photon Counting mode data and 1 UVOT images for GRB 190701A, we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 28.08140, +58.90943 which is equivalent to: RA (J2000): 01h 52m 19.54s Dec (J2000): +58d 54' 33.9" with an uncertainty of 1.9 arcsec (radius, 90% confidence). This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177). This circular was automatically generated, and is an official product of the Swift-XRT team. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24946 SUBJECT: GRB 190701A: COATLI Optical Observations DATE: 19/07/01 19:51:59 GMT FROM: Rosa Leticia Becerra Godinez at Inst. de Astronoma,UNAM Rosa L. Becerra (UNAM), Alan M. Watson (UNAM), Nat Butler (ASU), Diego González (UNAM),Alexander Kutyrev (GSFC), William H. Lee (UNAM), Margarita Pereyra (UNAM), and Eleonora Troja (GSFC) report: We observed the field of GRB 190701A (Ukwatta et al., GCN Circ. 24934) with the COATLI 50-cm telescope and interim imager at the Observatorio Astronómico Nacional on the Sierra de San Pedro Mártir (http://coatli.astroscu.unam.mx) from 2019-07-01 09:47:03 to 10:05:06 (from 25.6 seconds after the alert or 103 seconds to 0.33 hours after the trigger), obtaining a total of 490 seconds of exposure in the w filter. Comparing to the USNO and Pan-STARRS1 catalogs, we do not detect any new sources brighter than w = 20.99 (3-sigma limiting mag) in the XRT error region (Osborne et al., GCN Circ. 24940). Our w magnitudes are calibrated against the Pan-STARRS1 catalog, are on an approximate AB system, and are not corrected for Galactic extinction in the direction of the GRB. We thank the COATLI technical team and the staff of the Observatorio Astronómico Nacional. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24954 SUBJECT: GRB190701A: No candidates/counterpart in optical follow-up from GROWTH-India Telescope DATE: 19/07/01 22:13:43 GMT FROM: Harsh Kumar at Indian Inst of Tech,Bombay H. Kumar, V. Karambelkar, K. Deshmukh, G. Waratkar, V. Bhalerao (IITB), G. C. Anupama, T. Stanzin (IIA) report on behalf of the GROWTH collaboration: We observed GRB190701A reported by T. N. Ukwatta et al, (GCN 24934) with 0.7m GROWTH-India telescope. The field was observed in g, r and i filters. We didn’t detect any new source within an uncertainty region of 1.9 arcseconds (radius, 90% containment) around RA(J2000) = 01h 52m 19.54s, Dec(J2000) = +58d 54' 33.9" (J.P. Osborne et al, GCN 24940). We obtained the following upper limits: ------------------------------------------------------------------ JD(Start)| Exposure(sec) | Filter | lim_Mag | ------------------------------------------------------------------ 2458666.351 | 600 | g | 19.18| 2458666.373 | 600 | r | 20.57| 2458666.382 | 600 | i | 19.52| ------------------------------------------------------------------ The GROWTH India Telescope (GIT) is a 70-cm telescope with a 0.7 degree field of view, set up by the Indian Institute of Astrophysics and the Indian Institute of Technology Bombay with support from the Indo-US Science and Technology Forum (IUSSTF) and the Science and Engineering Research Board (SERB) of the Department of Science and Technology (DST), Government of India (https://sites.google.com/view/growthindia/). It is located at the Indian Astronomical Observatory (Hanle), operated by the Indian Institute of Astrophysics (IIA). //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24955 SUBJECT: GRB 190701A: Swift/UVOT Upper Limits DATE: 19/07/01 22:18:53 GMT FROM: Mike Siegel at PSU/Swift MOC M. H. Siegel (PSU) and T. N. Ukwatta (LANL) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 190701A 145 s after the BAT trigger (Ukwatta et al., GCN Circ. 24934). No optical afterglow consistent with the enhanced XRT position (Osborne et al. GCN Circ. 24940) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white_FC 145 295 147 >20.3 u_FC 303 553 246 >19.8 white 145 6776 727 >21.2 v 629 11104 409 >19.3 b 559 6570 432 >20.6 u 303 6365 659 >20.6 w1 677 6160 432 >19.9 m2 652 5955 432 >19.3 w2 610 10926 1158 >20.2 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.59 in the direction of the burst (Schlegel et al. 1998). //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24961 SUBJECT: GRB 190701A: Swift-XRT refined Analysis DATE: 19/07/02 02:35:59 GMT FROM: Phil Evans at U of Leicester E. Ambrosi (INAF-IASFPA) , V. D'Elia (ASDC), D.N. Burrows (PSU), J. D. Gropp (PSU), A. Tohuvavohu (PSU), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), A. D'Ai (INAF-IASFPA) and T.N. Ukwatta report on behalf of the Swift-XRT team: We have analysed 8.4 ks of XRT data for GRB 190701A (Ukwatta et al. GCN Circ. 24934), from 144 s to 34.9 ks after the BAT trigger. The data comprise 10 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Osborne et al. (GCN Circ. 24935). The light curve can be modelled with an initial power-law decay with an index of alpha=8.0 (+0.0, -0.9), followed by a break at T+239 s to an alpha of 0.40 (+0.08, -0.09). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.81 (+0.23, -0.12). The best-fitting absorption column is consistent with the Galactic value of 6.4 x 10^21 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.7 x 10^-11 (7.1 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 6.4 (+/-1.0) x 10^21 cm^-2 Galactic foreground: 6.4 x 10^21 cm^-2 Excess significance: <1.6 sigma Photon index: 1.81 (+0.23, -0.12) If the light curve continues to decay with a power-law decay index of 0.40, the count rate at T+24 hours will be 0.018 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 8.5 x 10^-13 (1.3 x 10^-12) erg cm^-2 s^-1. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00912310. This circular is an official product of the Swift-XRT team. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24973 SUBJECT: GRB 190701A, Swift-BAT refined analysis DATE: 19/07/03 14:11:50 GMT FROM: Hans Krimm at NSF/NASA-GSFC A. Y. Lien (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team): Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 190701A (trigger #912310) (Ukwatta, et al., GCN Circ. 24934). The BAT ground-calculated position is RA, Dec = 28.131, 58.899 deg which is RA(J2000) = 01h 52m 31.5s Dec(J2000) = +58d 53' 56.9" with an uncertainty of 2.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 52%. The mask-weighted light curve shows a multi-peaked structure. The main period of emission includes three broad peaks between roughly T+0 sec and T+100 sec, peaking about T+38 sec. T90 (15-350 keV) is 52.4 +- 4.0 sec (estimated error including systematics). The time-averaged spectrum from T+35.0 to T+90.0 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.91 +- 0.27. The fluence in the 15-150 keV band is 8.7 +- 1.5 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+37.92 sec in the 15-150 keV band is 1.2 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence level. The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/912310/BA/