Наблюдаем гамма-всплески

[Виктор Воропаев]

TITLE: GCN CIRCULAR
NUMBER: 23124
SUBJECT: GRB 180809B: CrAO optical observations
DATE: 18/08/10 19:50:36 GMT
FROM: Alexei Pozanenko at IKI, Moscow

E. Mazaeva (IKI), V. Rumyantsev (CrAO), A. Pozanenko (IKI), A.
Volnova (IKI), report on behalf of larger GRB follow-up collaboration:

We observed the field of the GRB 180809B (Moss et al., GCN 23105)
with ZTSH 2.6m telescope of CrAO observatory starting on Aug. 9 (UT)
21:14:58. We took several images in BVRI filters with exposures of 120
s. We detect the afterglow (e.g., Moss et al., GCN 23105; Lipunov et
al., GCN 23109; Schweyer et al. GCN 23111; Guidorzi et al., GCN 23112,
Tiurina et al., GCN 23113).
Preliminary photometry of the afterglow in R- filter is following

UT start t-T0 Filter Exp. OT err
(mid, days) (s)

21:14:58.579 0.03276 R 1*120 19.80 0.05
21:17:05.489 0.03423 R 1*120 19.86 0.04
21:19:12.801 0.03570 R 1*120 19.93 0.05
21:25:54.597 0.04035 R 1*120 20.35 0.05
21:34:27.347 0.04629 R 1*120 20.86 0.08
21:43:00.178 0.05519 R 2*120 21.51 0.11

The photometry is based on nearby USNO-B1.0 stars:

Ref.stars   
USNO-B1.0_id   R2
0747-0765959   19.65
0746-0776364   18.76
0746-0776499   19.18

[Виктор Воропаев]

TITLE:   GCN CIRCULAR
NUMBER:  23206
SUBJECT: GRB 180904A: AbAO optical upper limit
DATE:    18/09/05 16:18:22 GMT
FROM:    Alexei Pozanenko at IKI, Moscow

A. Volnova  (IKI),  A. Pozanenko (IKI), R. Inasaridze (AbAO),  E.
Mazaeva (IKI),  V. Ayvazian  (AbAO),  O. Kvaratskhelia (AbAO), G.
Kapanadze (AbAO),  I. Molotov (KIAM) report on behalf of larger GRB
follow-up collaboration:

We observed the field of the Swift GRB 180904A (D'Ai et al., GCN 23194)
with AS-32 (0.7m) telescope of Abastumani Observatory starting on
September 04 (UT) 21:52:23.   We do not detect any object within
enhanced XRT position (Osborne et al., GCN 23196). Preliminary
photometry of the field is following:

Date        UT start   t-T0      Filter Exp.   OT    Err. UL
                      (mid, days)        (s)

2018-09-04  21:52:23   0.05731   CR     70*60  n/d   n/d  21.5

The photometry is based on nearby USNO-B1.0 stars (R2 magnitude)
USNO-B.1_id    R2
1366-0296056   14.72
1366-0296068   15.43
1365-0287325   15.62
1366-0296106   15.21
1366-0296088   14.95
1366-0296093   14.37

[Виктор Воропаев]

TITLE:   GCN CIRCULAR
NUMBER:  23244
SUBJECT: GRB 180914B : TSHAO optical observations
DATE:    18/09/17 10:26:49 GMT
FROM:    Alexei Pozanenko at IKI, Moscow

E. Mazaeva (IKI), A. Pozanenko (IKI), I. Reva (FAPHI), A. Kusakin
(FAPHI), A. Volnova (IKI), M. Krugov (FAPHI) report on behalf of larger
GRB follow-up collaboration:

We observed the field of GRB 180914B (Ursi, et al., GCN  23226; Bissaldi
et al., GCN 23232;  Frederiks et al., GCN 23240) with Zeiss-1000 1-m
telescope of Tien Shan Astronomical Observatory starting on September 16
(UT) 19:44:34, obtaining a total of 46.5 minutes exposure in the
Rc-band. Within XRT position (D'Ai et al., GCN 23236)  we detect the
object reported by Zheng & Filippenko (GCN 23237), Troja et al. (GCN
23238),  (Paul & Kuin, GCN 23241). Preliminary photometry of the objext
is following.

Date       UT start t-T0    Filter Exp.  OT    Err. UL
                     (mid, days) (s)

2018-09-16 19:44:34 2.07692 R      31*90 19.89 0.05 21.9

The photometry is based on several nearby SDSS-DR9 stars.
SDSS-DR9_id            R(Lupton)
J220926.80+250130.1    15.705
J220922.87+250206.0    16.156
J220929.88+250257.7    15.812
J220928.05+250309.0    17.230
J220928.90+250327.6    15.524
J220924.12+250415.7    15.485
J220920.37+250610.6    15.050
J220902.04+250312.5    15.321

[Виктор Воропаев]

TITLE:   GCN CIRCULAR
NUMBER:  23302
SUBJECT: GRB 180930A: TSHAO optical upper limit
DATE:    18/10/03 17:10:51 GMT
FROM:    Alexei Pozanenko at IKI, Moscow

E. Mazaeva (IKI), A. Kusakin (FAPHI), A. Pozanenko (IKI), I. Reva
(FAPHI),  A. Volnova (IKI), M. Krugov (FAPHI) report on behalf of larger
GRB follow-up collaboration:

We observed the field of GRB 180930A (Tohuvavohu et al., GCN  23279)
with Zeiss-1000 1-m telescope of Tien Shan Astronomical Observatory
starting on September 30 (UT) 21:55:14, obtaining a total of 31*120 s
exposure in the Rc-band. Within enhanced XRT position (Osborne et al.,
GCN 23282)  we do not detect any object. Preliminary photometry of the
field is following.

Date       UT start t-T0    Filter Exp.   OT    Err. UL
                     (mid, days) (s)

2018-09-30 21:55:14 0.41030 R      31*120 n/d   n/d 20.1

The photometry is based on several nearby USNO-B1.0 stars.

[Виктор Воропаев]

TITLE:   GCN CIRCULAR
NUMBER:  23341
SUBJECT: GRB 181013A: AbAO optical upper limit
DATE:    18/10/15 18:04:31 GMT
FROM:    Alexei Pozanenko at IKI, Moscow

 E. Mazaeva (IKI),  S. Belkin (IKI),  A. Pozanenko (IKI), R. Inasaridze
(AbAO), V. Ayvazian  (AbAO),  O. Kvaratskhelia (AbAO), G. Kapanadze (AbAO),
A. Volnova  (IKI),  I. Molotov (KIAM) report on behalf of larger GRB
follow-up collaboration:

We observed the field of the Swift GRB 181013A (D'Avanzoet al., GCN 23332)
with AS-32 (0.7m) telescope of Abastumani Observatory starting on  Oct. 13
(UT) 15:23:15 .   We do not detect any object within  XRT position (Osborne
et al., GCN 23334). Preliminary  photometry of the field is following:

Date              UT start     t-T0            Filter Exp.   OT    Err. UL
                                        (mid, days)         (s)

2018-10-13 15:23:15    0.54312    R      58*60  n/d   n/d  21.0

The photometry is based on nearby SDSS-DR12 stars
SDSS-DR12_id R(Lupton)
J135025.82+400818.8 16.99
J135102.99+401021.5 16.36
J135015.70+400244.5 13.69
J135009.92+400351.8 13.87
J135009.71+400308.0 14.87

[Виктор Воропаев]

TITLE: GCN CIRCULAR
NUMBER: 23410
SUBJECT: GRB 181103A: AbAO optical upper limit
DATE: 18/11/05 08:51:38 GMT
FROM: Alexei Pozanenko at IKI, Moscow

A. Volnova (IKI), A. Pozanenko (IKI), R. Inasaridze (AbAO), E.
Mazaeva (IKI), S. Belkin (IKI), V. Ayvazian (AbAO), O. Kvaratskhelia
(AbAO), G. Kapanadze (AbAO), I. Molotov (KIAM) report on behalf of
larger GRB follow-up collaboration:

We observed the field of the Swift GRB 181103A (Tohuvavohu et al., GCN
23402) with AS-32 (0.7m) telescope of Abastumani Observatory starting on
Nov. 3 (UT) 15:02:42. We do not detect any object within enhanced
XRT position (Evans et al., GCN 23403). In particular we do not detect
the source reported by LaPorte et al. (GCN 23407). Preliminary
photometry of the field is following:

Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)

2018-11-03 15:02:42 0.47151 R 63*60 n/d n/d 20.5

The photometry is based on nearby SDSS-DR12 stars (R, Lupton
transformation).

[Виктор Воропаев]

TITLE:   GCN CIRCULAR
NUMBER:  23479
SUBJECT: GRB 181201A: Zeiss-1000/CrAO optical observations
DATE:    18/12/01 23:21:37 GMT
FROM:    Alina Volnova at SAI MSU

E. Mazaeva (IKI), A. Volnova (IKI), A. Pozanenko (IKI), I. Nikolenko
(CrAO), D. Chestnov (KIAM, PetrSU), I. Molotov (KIAM)
report on behalf of larger GRB follow-up collaboration:

We observed the field of the INTEGRAL GRB 181201A (Mereghetti et al.,
GCN 23469) with Zeiss-1000/Koshka (CrAO) telescope starting Dec 01,
16:55:28 UT. We obtained several frames in R filter. The optical
afterglow (Podesta et al., GCN  23470; Kong, GCN 23475) is clearly
detected in the stacked frame. Preliminary photometry is following:

Date             UT start   t-T0            Filter   Exp.     OT      Err.
                                   (mid, days)            (s)
2018-12-01 16:55:28  0.60359      R        23*60   17.17   0.05

The photometry is based on  SDSS DR12 nearby stars.

[Виктор Воропаев]

TITLE:   GCN CIRCULAR
NUMBER:  23530
SUBJECT: GRB 181213A : TSHAO optical observations
DATE:    18/12/13 17:45:03 GMT
FROM:    Alexei Pozanenko at IKI, Moscow

S. Belkin (IKI), A. Kusakin (FAPHI), A. Pozanenko (IKI), I. Reva
(FAPHI), A. Volnova (IKI),  E. Mazaeva (IKI), M. Krugov (FAPHI) report
on behalf of larger GRB follow-up collaboration:

We observed the field of GRB 181213A (Evans et al., GCN 23525; Osborne
et al., GCN 23528) with Zeiss-1000 1-m telescope of Tien Shan
Astronomical Observatory starting on Dec. 13 (UT) 13:39:23.  We detected
the OT reported earlier (Lipunov et al., GCN 23526; Hu et al. GCN 23527;
  Siegel  et al., GCN 23529). Preliminary photometry of the object is
following.

Date       UT start t-T0    Filter Exp. OT    Err. UL
                     (mid, days) (s)

2018-12-13 13:39:23 0.04427 R      2640 17.27 0.08 21.8

The photometry is based on nearby USNO-B1.0 stars
USNO-B1.0_id R2
1684-0061916 15.83
1684-0061968 16.55

[Виктор Воропаев]

TITLE:   GCN CIRCULAR
NUMBER:  23539
SUBJECT: GRB 181213A: AbAO optical observations
DATE:    18/12/14 11:31:27 GMT
FROM:    Alexei Pozanenko at IKI, Moscow

S. Belkin (IKI), A. Pozanenko (IKI), R. Ya. Inasaridze (AbAO),
V.R. Ayvazian (AbAO),    G. V.  Kapanadze (AbAO),   E. Mazaeva (IKI),
A. Volnova  (IKI),  I. Molotov (KIAM) report on behalf of larger GRB
follow-up collaboration:

We observed the field of GRB 181213A (Evans et al., GCN 23525; Osborne
et al., GCN 23528) with AS-32 (0.7m) telescope of Abastumani Observatory
starting on Dec. 13 (UT) 15:42:55.  We detected the OT   (e.g. Lipunov
et al., GCN 23526; Hu et al. GCN 23527;  Siegel  et al., GCN 23529;
Belkin et al., GCN 23530). Preliminary photometry of the afterglow is
following.

Date       UT start t-T0   Filter Exp.  OT    Err. UL
                     (mid, days) (s)

2018-12-13 15:42:55 0.13264 R     65*60 18.75 0.08 20.9

The photometry is based on nearby USNO-B1.0 stars
USNO-B1.0_id R2
1684-0061916 15.83
1684-0061968 16.55

[Виктор Воропаев]

TITLE:   GCN CIRCULAR
NUMBER:  23601
SUBJECT: GRB 181201A: photometric signature of the SN
DATE:    19/01/03 20:40:28 GMT
FROM:    Alexei Pozanenko at IKI, Moscow

S. Belkin (IKI), E. Mazaeva (IKI),  A. Pozanenko (IKI),  P. Minaev
(IKI), A. Volnova (IKI), N. Tominaga (Konan University), S. Blinnikov
(ITEP), D. Chestnov (KIAM), E. Klunko (ISTP), I. Reva (FAPI), V.
Rumyantsev (CrAO),  D. Buckley (SAAO), R. Ya. Inasaridze (AbAO) report
on behalf of  GRB-FuN collaboration:

We observed  the   optical afterglow (e.g. Podesta et al., GCN  23470;
Kong  GCN 23475) of the INTEGRAL GRB 181201A  (Mereghetti et al., GCN
23469)  with   Gemini-N telescope  on Dec. 22 in g'r'i'z and Dec. 24  in
r'i'-filters.  Preliminary photometry of the OT is following.

Date            t-T0  Filter Exp.   OT     Err.
                 (mid, days)  (s)

2018-12-22  21.10536 i'     3*180  21.50  0.03
2018-12-22  21.09536 r'     3*180  21.82  0.03
2018-12-24  23.09418 i'     3*180  21.32  0.06
2018-12-24  23.10793 r'     3*240  21.83  0.03

The photometry is based on the SDSS-DR12 star
SDSS-DR12_id           i'       r'
J211710.81-123706.3    16.257   16.517

Based on our previous observations and photometry reported in GCNs
23475, 23478,  23486, 23504 we plot a light curve of the afterglow in
r'-filter.
Power law approximation of the LC before 2018-12-22 has an index of
1.19 +/-0.01. The photometry obtained on 2018-12-22 and 2018-12-24 has a
significance of about 2 and 6.5 sigma above the power law approximation.
Additionally the i'-magnitude increases between  the two epochs. We can
suggest that we observed the Supernova signature associated with GRB
181201A.

[Виктор Воропаев]

TITLE: GCN CIRCULAR
NUMBER: 23620
SUBJECT: GRB 190106A : TSHAO optical observations
DATE: 19/01/06 15:27:05 GMT
FROM: Alexei Pozanenko at IKI, Moscow

I. Reva (FAPHI), A. Pozanenko (IKI),
A. Kusakin (FAPHI), S. Belkin (IKI), A. Volnova (IKI), E. Mazaeva 
(IKI), M. Krugov (FAPHI) report on behalf of larger GRB follow-up 
collaboration:

We observed the optical transient (Yurkov et al., GCN 23614; Sonbas et 
al., GCN 23615; Lipunov et al., GCN 23616; Itoh et al., GCN 23617) of 
GRB 190106A (Sonbas et al., GCN 23615) with Zeiss-1000 1-m telescope of 
Tien Shan Astronomical Observatory starting on Jan. 6 (UT) 13:45:42. 
Preliminary photometry of the object in the beginnig of observations is 
R= 16.23 +/- 0.05, and the optical transient is faded as R= 17/5 +/- 0.1 
at (UT) 14:24:04. (The photometry is based on nearby USNO-B1.0 stars). 
Observations are continuing in R and B - filters.

[Виктор Воропаев]

TITLE:   GCN CIRCULAR
NUMBER:  23846
SUBJECT: GRB 190203A: Koshka Zeiss-1000 optical upper limit
DATE:    19/02/03 16:51:04 GMT
FROM:    Alexei Pozanenko at IKI, Moscow

A. Novichonok (KIAM), A. Pozanenko (IKI), E. Mazaeva (IKI),  S. Belkin
(IKI), A. Volnova (IKI),  I. Molotov (KIAM) report on behalf of larger
GRB follow-up collaboration:

We observed the field of GRB 190203A (Lien , et al., GCN  23845)   with
Zeiss-1000 1-m telescope of Koshka Observatory starting on Feb. 03  (UT)
02:40:34 in  R-filter under not optimal weather conditions.   We do not
detect the optical afterglow candidate (Lien , et al., GCN  23830).
Preliminary photometry of the combined of first 4 images of 4*180
seconds started on 2019-02-03 16:01:10 is R=19.5. Observation is continuing.

The photometry is based on several nearby USNO-B1.0 stars.

[Виктор Воропаев]

TITLE:   GCN CIRCULAR
NUMBER:  23843
SUBJECT: GRB 190202A: TSHAO optical observations
DATE:    19/02/03 11:14:49 GMT
FROM:    Alexei Pozanenko at IKI, Moscow

S. Belkin (IKI), I. Reva (FAPHI), A. Pozanenko (IKI), E. Mazaeva (IKI),
A. Volnova (IKI), A. Kusakin (FAPHI), M. Krugov (FAPHI) report on behalf
of IKI-GRB-FuN collaboration:

We observed the afterglow of GRB 190202A (Lien et al., GCN 23830;
Novichonok et al., GCN 23831; Evans et al., GCN 23832; Steeghs et al.,
GCN 23833; Kuin et al., GCN 23834; Verrecchia et al., GCN 23835;
Markwardt et al., GCN 23836; Veres et al., GCN 23838; Cucchiara et al.,
GCN 23839; Lien et al., GCN 23840; Paek  et al., GCN 23841; Malesani et
al., GCN 23842) with Zeiss-1000 1-m telescope of Tien Shan Astronomical
Observatory starting on Feb. 02 (UT) 21:04:32.   Preliminary photometry
of the field is following.

Date       UT start t-T0    Filter Exp.   OT    Err.  UL
                     (mid, days) (s)

2019-02-02 21:04:32 0.82502 R      21*120 20.43 0.11  21.6

The photometry is based on nearby USNO-B1.0 stars

[Виктор Воропаев]

TITLE: GCN CIRCULAR
NUMBER: 23919
SUBJECT: GRB 190220B: Kitab Observatory optical upper limit
DATE: 19/02/21 14:58:34 GMT
FROM: Alexei Pozanenko at IKI, Moscow

S. Belkin (IKI), A. Novichonok (KIAM), A. Pozanenko (IKI), E. Mazaeva
(IKI), A. Volnova (IKI), I. Molotov (KIAM) report on behalf of larger
GRB follow-up collaboration:

We observed the field of INTEGRAL GRB 190220B (Gotz et al., GCN 23915)
with RC-36 0.36-m telescope of Kitab Observatory starting on Feb. 20
(UT) 23:20:25 in Clear filter. We do not find any optical afterglow
candidate in the INTEGRAL GRB 190220B localization error circle (Gotz,
et al., GCN 23915) with is in agreement with earlier non detection by
BOOTES-4 (Hu et al., GCN 23916). Preliminary photometry of the field is
following.

Date UT start t-T0 Filter Exp. OT Err. UL(3sigma)
(mid, days) (s)

2019-02-20 23:20:25 0.14972 CR 48*60 19.0 n/d n/d

The photometry is based on the nearby USNO-B1 (R2) stars.

[Виктор Воропаев]

TITLE: GCN CIRCULAR
NUMBER: 23920
SUBJECT: GRB 190219A: CrAO and AbAO optical upper limit
DATE: 19/02/21 18:44:49 GMT
FROM: Alexei Pozanenko at IKI, Moscow

A. Volnova (IKI), S. Nazarov (CrAO), S. Schmalz (KIAM), R. Ya.
Inasaridze (AbAO), A. Pozanenko (IKI), S. Belkin (IKI), E. Mazaeva
(IKI), I. Molotov (KIAM) report on behalf of IKI-GRB-FuN collaboration:

We observed the field of GRB 190219A (Beardmore et al., GCN 23902) with
AZT-8 of CrAO, AS-32 (0.7m) telescope of Abastumani Observatory and
ORI-22 telescope of ISON-Castelgrande Observatory, first observation
starting on Feb. 19 (UT) 19:48:14. We do not detect any object within
enhanced XRT error circle (Beardmore et al., GCN 23907). In particular
we do not detect the afterglow candidate (Xu et al., GCN 23911).
Preliminary photometry of the field is following.

date UT start t-T0 Filter Exp. UL Obs./Tel.
(mid, d) (s) (3 sigma)
2019-02-19 20:14:14 0.02991 R 780 20.3 CrAO/AZT-8
2019-02-20 00:39:36 0.28998 R 95*60 20.8 AbAO/AS-32

The photometry is based on nearby USNO-B1.0 stars.