{
  "bibcode": "2019GCN.25686....1C",
  "body": "I. Chelovekov, A. Pozanenko, P. Minaev, S. Grebenev on behalf of the IKI\nGRB FuN collaboration report:\n\nUsing SPI-ACS/INTEGRAL data  we performed a search for a possible GRB \nwhich can be a source of the orphan  transient ZTF19abvizsw discovered \nand observed in optic (Kool et al., GCN 25616; Burdge et al., GCN 25639; \nWei et al., GCN 15640; Perley et al., GCN 25643; Belkin GCN 25683).\n\nThe search was performed in    a time window between the last ZTF \nnon-detection (2019-09-01 UT 07:35) and the discovery of \nZTF19abvizsw/AT2019pim (2019-09-02 03:08). The SPI-ACS was switch off at \nlow orbit radiation belts pass between 2019-09-01 09:09:36 - 2019-09-01 \n19:28:44, and operating normally in other time intervals. A blind search \nfor impulsed events was performed on two time scales, 1s and 5 s. We \nfound following candidates for long duration GRBs. Below we present UTC \ntime of the trigger, light curve figure and comment. Some event data is \nalso presented in the figures.\n\n1.\nUTC: 2019-09-01T07:24:05\nref: \nhttp://193.232.11.154/ZTF19abvizsw_binned/png/213100540010.000_acs_lc_T1__00452_00515.png\n2019-09-01T07:24:05\ncomment: not visible in GBM\n\n2.\nUTC: 2019-09-01T21:24:43\nref: \nhttp://193.232.11.154/ZTF19abvizsw_binned/png/213200030010.000_acs_lc_T1__00043_00071.png\ncomment: might be coinciding with the tail of GBM trigger bn190901890 at \n2019-09-01 21:19:37.514\n\n3.\nUTC: 2019-09-02T01:36:16\nref: \nhttp://193.232.11.154/ZTF19abvizsw_binned/png/213200070010.000_acs_lc_T1__01320_01395.png\ncomment: no GBM data yet\ncomment: the event is also triggered IBAS\n\nOne more triggered event  at 2019-09-01T19:32:19 is most probably \ngeophysical origin because of coincidence with IREM  channel of  e- with \nenergies more than 500 keV.  We also note the absence of any trigger in \nGBM data at that time. We do not consider it as a candidate,  we plot it \nonly for the reference.\nref: \nhttp://193.232.11.154/ZTF19abvizsw_binned/png/213200010010.000_acs_lc_T1__00205_00256.png",
  "circularId": 25686,
  "createdOn": 1567955523000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "ZTF19abvizsw/AT2019pim, search for GRB in SPI-ACS/INTEGRAL data",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "ZTF19abvizsw"
}