[vsnet-grb-info 18277] GRB 160703, GRB 160705, GRB 160720, SGR1935+2154: First SGRs and GRBs detected by Lomonosov.

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19725
SUBJECT: GRB 160703, GRB 160705, GRB 160720, SGR1935+2154: First SGRs and GRBs detected by Lomonosov.
DATE:    16/07/21 15:43:48 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

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