//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 25036 SUBJECT: IPN triangulation of GRB 190706D (short) DATE: 19/07/08 19:23:17 GMT FROM: Dmitry Svinkin at Ioffe Institute D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Kozlova, and T. Cline on behalf of the Konus-Wind team, K. Hurley, on behalf of the IPN, A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, and S. Barthelmy, J. Cummings, H. Krimm, and D. Palmer, on behalf of the Swift-BAT team, report: The short-duration GRB 190706D has been detected by INTEGRAL (SPI-ACS trigger 8326), Konus-Wind, and Swift (BAT), so far, at about 61381 s UT (17:03:01). The burst was outside the coded field of view of the BAT. We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 324.618 (21h 38m 28s) +9.901 ( +9d 54' 02") Corners: 329.663 (21h 58m 39s) +2.806 ( +2d 48' 22") 334.060 (22h 16m 14s) +7.015 ( +7d 00' 54") 317.812 (21h 11m 15s) +15.409 (+15d 24' 34") 312.109 (20h 48m 26s) +9.995 ( +9d 59' 42") --------------------------------------------- The error box area is about 113 sq. deg, and its maximum dimension is 21.9 deg (the minimum one is 6 deg). The Sun distance was about 130 deg. This box may be improved. The main fraction of the box was Earth occulted for Fermi. This burst is spatially and temporally inconsistent with LIGO/Virgo S190706ai (LVC GCN Circ. 24998) and LIGO/Virgo S190707q (LVC GCN Circ. 25012). A triangulation map is posted at http://www.ioffe.ru/LEA/GRBs/GRB190706_T61390/IPN The time history and spectrum will be given in forthcoming GCN Circulars. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 25047 SUBJECT: Konus-Wind observation of GRB 190706D DATE: 19/07/10 12:32:13 GMT FROM: Anastasia Tsvetkova at Ioffe Institute A. Tsvetkova, S. Golenetskii, R.Aptekar, D. Frederiks, M. Ulanov, D. Svinkin, A. Lysenko, A. Kozlova and T. Cline on behalf of the Konus-Wind team, report: The short-duration GRB 190706D (IPN triangulation: Svinkin et al., GCN 25036) triggered Konus-Wind at T0=61390.044 s UT (17:03:10.044). The burst light curve shows a a single pulse which starts at ~T0-0.3 s and has a total duration of ~0.5 s. The emission is seen up to ~3 MeV. As observed by Konus-Wind, the burst had a fluence of 7.44 (-1.10,+1.24)x10^-7 erg/cm2, and a 64-ms peak energy flux, measured from T0+0.082 s, of 2.37 (-0.35,+0.40)x10^-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range). Since the bulk of the burst emission was detected before the trigger, the spectral analysis was performed using the KW 3-channel light curve data. Modeling the KW 3-channel time-integrated spectrum (from T0-0.294 s to T0+0.172 s) by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) yields alpha = -0.71 (-0.30,+0.36), and Ep = 246 (-51,+70) keV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB190706_T61390/ All the quoted errors are at the 68% confidence level. All the quoted values are preliminary. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 25061 SUBJECT: GRB 190706D: Insight-HXMT/HE detection DATE: 19/07/12 14:08:53 GMT FROM: YaoGuang Zheng at IHEP Y. G. Zheng, C. Cai, Q. Luo, S. Xiao, Q. B. Yi, Y. Huang, C. K. Li, G. Li, X. B. Li, J. Y. Liao, S. L. Xiong, C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, A. M. Zhang, Y. F. Zhang, X. F. Lu, C. L. Zou (IHEP), Y. J. Jin, Z. Zhang (THU), T. P. Li (IHEP/THU), F. J. Lu, L. M. Song, M. Wu, Y. P. Xu, S. N. Zhang (IHEP), report on behalf of the Insight-HXMT team: At 2019-07-06T17:03:05.40 (T0), Insight-HXMT/HE detected GRB 190706D (trigger ID: HEB190706710) in a routine search of the data， which was also triggered by INTEGRAL/SPI-ACS (trigger #8326) and Konus-Wind (GCN #25047). The Insight-HXMT/HE light curve mainly consists of a single pulse with a duration (T90) of 0.28 s measured from T0-0.10 s. The 1-ms peak rate, measured from T0-0.07 s, is 2551 cnts/sec. The total counts from this burst is 633 counts. URL_LC: http://www.hxmt.org/images/GRB/HEB190706710_lc.jpg All measurements above are made with the CsI detectors operating in the regular mode with the energy range of about 80-800 keV (deposited energy). Only gamma-rays with energy greater than about 200 keV can penetrate the spacecraft and leave signals in the CsI detectors installed inside of the telescope. Insight-HXMT is the first Chinese space X-ray telescope, which was funded jointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information about it could be found at: http://www.hxmt.org.