Gamma-ray Burst 160705A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN Notice
  

  TITLE:           GCN/MAXI NOTICE
  NOTICE_DATE:     Tue 05 Jul 16 02:52:20 UT
  NOTICE_TYPE:     MAXI Unknown Source Position
  EVENT_ID_NUM:    574072565
  EVENT_RA:        116.75d {+07h 47m 00s} (J2000),
                   116.94d {+07h 47m 45s} (current),
                   116.17d {+07h 44m 42s} (1950)
  EVENT_DEC:       -14.98d {-14d 59' 05"} (J2000),
                   -15.03d {-15d 01' 34"} (current),
                   -14.86d {-14d 51' 38"} (1950)
  EVENT_ERROR:     1.0 [deg radius, stat+sys, 90% containment]
  EVENT_FLUX:      1449.0 +- 0.0 [mCrab]
  EVENT_DATE:      17574 TJD;   187 DOY;   16/07/05
  EVENT_TIME:      9012.00 SOD {02:30:12.00} UT
  EVENT_TSCALE:    1s
  EVENT_EBAND:     Medium, 4-10 keV
  SUN_POSTN:       104.69d {+06h 58m 46s}  +22.75d {+22d 44' 57"}
  SUN_DIST:         39.63 [deg]  
  MOON_POSTN:      113.21d {+07h 32m 51s}  +17.72d {+17d 43' 18"}
  MOON_DIST:        32.95 [deg]  
  MOON_ILLUM:      1 [%]
  GAL_COORDS:      232.64,  5.08 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      122.27,-35.48 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        MAXI Unknown Source Position. GRB or unknown X-ray Transient.
  

• GCN Notice
  

  TITLE:           GCN/MAXI NOTICE
  NOTICE_DATE:     Tue 05 Jul 16 03:21:50 UT
  NOTICE_TYPE:     MAXI Unknown Source Position
  EVENT_ID_NUM:    574072565
  EVENT_RA:        117.01d {+07h 48m 02s} (J2000),
                   117.20d {+07h 48m 48s} (current),
                   116.44d {+07h 45m 45s} (1950)
  EVENT_DEC:       -14.96d {-14d 57' 24"} (J2000),
                   -15.00d {-14d 59' 55"} (current),
                   -14.83d {-14d 49' 54"} (1950)
  EVENT_ERROR:     1.0 [deg radius, stat+sys, 90% containment]
  EVENT_FLUX:      631.0 +- 0.0 [mCrab] 
  EVENT_DATE:      17574 TJD;   187 DOY;   16/07/05
  EVENT_TIME:      9012.00 SOD {02:30:12.00} UT
  EVENT_TSCALE:    1s
  EVENT_EBAND:     Medium, 4-10 keV
  SUN_POSTN:       104.71d {+06h 58m 51s}  +22.75d {+22d 44' 50"}
  SUN_DIST:         39.68 [deg]  
  MOON_POSTN:      113.51d {+07h 34m 02s}  +17.69d {+17d 41' 31"}
  MOON_DIST:        32.89 [deg]  
  MOON_ILLUM:      1 [%]
  GAL_COORDS:      232.74,  5.31 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      122.56,-35.39 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        MAXI Unknown Source Position. GRB or unknown X-ray Transient.
  

• GCN Circular #19654
  S. Oda (Kyoto U), M. Serino, W. Iwakiri (RIKEN), S. Nakahira(JAXA), H. Negoro(Nigon U.) S. Ueno, H. Tomida, M. Ishikawa, Y. Sugawara (JAXA), T. Mihara, M. Sugizaki, M. Shidatsu, J. Sugimoto, T. Takagi, M. Matsuoka (RIKEN), N. Kawai, N. Isobe, S. Sugita, T. Yoshii, Y. Tachibana, Y. Ono, T. Fujiwara (Tokyo Tech), A. Yoshida, T. Sakamoto, Y. Kawakubo, Y. Kitaoka (AGU), H. Tsunemi, R. Shomura (Osaka U.), M. Nakajima, K. Tanaka, T. Masumitsu, T. Kawase (Nihon U.), Y. Ueda, T. Kawamuro, T. Hori, A. Tanimoto (Kyoto U.), Y. Tsuboi, Y. Nakamura, R. Sasaki (Chuo U.), M. Yamauchi, K. Furuya (Miyazaki U.), K. Yamaoka (Nagoya U.) report on behalf of the MAXI team:
  The MAXI/GSC nova-alert system triggered a bright uncatalogued X-ray transient source at UT 02:30:12 on 2016 July 05. We obtain a rectangular error box for the transient source with the following corners:

  (116.602 deg, -14.589 deg) = (07 46 24, -14 35 19) (J2000)
  (116.761 deg, -14.453 deg) = (07 47 02, -14 27 09) (J2000)
  (117.580 deg, -15.549 deg) = (07 50 19, -15 32 55) (J2000)
  (117.419 deg, -15.683 deg) = (07 49 40, -15 40 58) (J2000)
  

  There is an additional systematic uncertainty of 0.1 deg (90% containment radius).
  The X-ray flux averaged over the scan was 631 +- 46 mCrab (4-10keV, 1 sigma error). There was no significant excess flux in the previous transit at 00:57 UT and in the next transit at 04:02 UT with an upper limit of 20 mCrab for each.
  Preliminary result shows that the MAXI/GSC spectrum is well fitted by a single power-law with a photon index of 1.2 (+/- 0.3) (chi^2/d.o.f = 7.15/11) or a blackbody model with a temperature of 2.0 (-0.3, +0.4) keV (chi^2/d.o.f = 6.91/11). Since the source is located at a relatively low Galactic latitude (b ~ 5 deg) and the spectrum can be represented with a ~2 keV blackbody model, we can not exclude the possibility that this event is an X-ray burst from a Galactic source.
  We tentatively name the source MAXI J0748-149.
• GCN Circular #19725
  A.M.Amelushkin, V.O.Barinova, A.V.Bogomolov, V.V.Bogomolov, A.F.Iyudin, V.V.Kalegaev, M.I.Panasyuk, V.L. Petrov, S.I.Svertilov, I.V.Yashin Lomonosov Moscow State University, Physics Department, Skobeltsyn Institute of Nuclear Physics, Moscow, Russia
  E.S. Gorbovskoy, V.G.Kornilov, V.M. Lipunov Lomonosov Moscow State University, Physics Department, Sternberg Astronomical Institute of M.V. Lomonosov Moscow, Moscow, Russia
  I. Park, J. Lee, S. Jeong Department of Physics, Sungkyunkwan University, Seobu-ro, Jangangu, Suwonsi, Korea
  Russian space mission "Lomonosov" (*) ( http://lomonosov.sinp.msu.ru/en/) was launched 28.04.2016 from new Russian Kosmodrom "Vostochny" to polar solar-synchronous orbit with altitude ~490 km. Scientific program of "Lomonosov" includes a multi-wavelength GRB study at different time scales. In particular the complex study of prompt emission will be provided based on the direct recording of readings of wide field optical cameras as well as on the fast pointing of optical and UV telescope using its moving mirror. The spacecraft "Lomonosov" contains 3 instruments for GRB study: gamma-ray burst monitor BDRG ( http://lomonosov.sinp.msu.ru/en/scientific-equipment-2/bdrg ), a wide field optical camera SHOK ( http://lomonosov.sinp.msu.ru/en/scientific-equipment-2/shok ) and UFFO ( http://lomonosov.sinp.msu.ru/en/scientific-equipment-2/uffo ) instrument consisting of coding mask X-ray telescope UBAT and UV slewing mirror telescope SMT.
  The Lomonosov GRB monitor BDRG is designed to obtain temporal and spectral information about GRBs in energy range 10-3000 keV as well as to produce GRB trigger.
  The trigger is used onboard to fix some amount of data before GRB stored in the internal memory of all instruments of GRB complex as well as to start the detailed data collection. Immediately after the trigger the onboard estimation of the GRB position starts. Then the telegram with trigger information is sent via Global Star transmitter to the server in MSU and, after automatic ground-based data processing (to exclude radiation belt zones etc.) to GCN (this will be realized sometime later after optimizing the trigger parameters during flight tests).
  There are 3 GRBs and 5 SGR outbursts are detected to the present BDRG GRB monitor, which were also detected by other space missions and presented in GCN:
  GRB 160703 12:10:02 UTC
  GRB 160705 17:40:19 UTC
  GRB 160720 18:27:55 UTC
  Bursts from SGR1935+2154

  18.06.2016 20:27:24 UTC,
  20.06.2016 15:16:34 UTC, 
  23.06.2016 21:20:45 UTC,
  23.06.2016 21:23:35 UTC,
  26.06.2016 13:54:29 UTC
  

  Press release is available at http://lomonosov.sinp.msu.ru/wp-content/uploads/GRB_by_BDRG_engl_pdf.pdf
  The message may be cited.
  (*) About M.V.Lomonosov https://en.wikipedia.org/wiki/Mikhail_Lomonosov