GRB 170317A
GCN Circular 21001
Subject
GRB 170317A: SAO RAS optical observations
Date
2017-04-07T20:23:42Z (9 years ago)
From
Moskvitin Alexander at SAO RAS <mosk@sao.ru>
A. Moskvitin (SAO RAS), E. Mazaeva (IKI), A. Pozanenko (IKI),
A. Volnova (IKI), on behalf of larger GRB follow-up collaboration:
We observed the field of GRB 170317A (LaPorte et al. GCN 20885)
with the SAO RAS telescope Zeiss-1000 + CCD photometer on March, 17
(18:12:00--19:58:03 UT). We obtained several images in Rc band.
The optical afterglow (LaPorte et al., GCN 20885;
Mazaeva et al., GCN 20886; Xin et al., GCN 20888;
Mao et al., GCN 20889; Kuroda et al., GCN 20899) is detected
in a stacked frame. Preliminary photometry is following
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2017-03-17 18:12:00 0.38823 Rc 15*300 22.3 0.3 22.6
Photometry is based on nearby USNO-B1.0 stars
previously used in GCN 20886.
GCN Circular 20966
Subject
DOAO 1m telescope V, R, I observation of GRB 170317A
Date
2017-04-01T02:04:01Z (9 years ago)
From
Changsu Choi at Seoul Nat U <changsu@astro.snu.ac.kr>
Changsu Choi(CEOU/SNU), Tae-Woo Kim(DOAO/NYSC), Myungshin Im(CEOU/SNU), on
behalf of a larger collaboration
We observed the field of GRB 170317A (LaPorte et al., GCN 20885) with 1m
telescope of Deokheung Optical Astronomy Observatory (DOAO) in Korea,
starting from 2017/3/17 10:41:47 to 11:59:41.5 UT which is 0.042 days to
0.093 days after BAT trigger. .
We obtained V, R, I images and clearly detected afterglow on the stacked
images (LaPorte et al., GCN 20885; Mazaeva et al., GCN20886; Xin et al.,
GCN 20888; Mao et al., GCN 20889; Kuroda et al., GCN20899).
The photometric calibration is based on in APASS catalog in the observed
field. No galactic extinction correction is applied.
Date UT start t-T0 Filter Exp. Mag
Err.
(mid, days) (s)
2017-03-17 10:41:47 0.042 I 180*3 18.86 0.10
2017-03-17 10:51:01 0.049 R 300*3 19.66 0.07
2017-03-17 11:06:18 0.057 I 300*5 20.29 0.26
2017-03-17 11:31:41 0.079 V 300*3 20.38 0.15
2017-03-17 11:46:59 0.086 R 300*2 19.98 0.15
2017-03-17 11:57:10 0.093 V 300*2 20.77 0.23
GCN Circular 20955
Subject
GRB 170317A: 15 GHz upper limits from AMI
Date
2017-03-31T13:28:06Z (9 years ago)
From
Kunal Mooley at Oxford U <kunal.mooley@physics.ox.ac.uk>
K. P. Mooley, T. D. Staley, R. P. Fender (Oxford), G. E. Anderson
(Curtin), T. Cantwell (Manchester), D. Titterington, S. H. Carey, J.
Hickish, Y. C. Perrott, N. Razavi-Ghods, P. Scott (Cambridge), K.
Grainge, A. Scaife (Manchester)
The AMI Large Array robotically triggered on the Swift alert for GRB
170317A (LaPorte et al., GCN 20885) as part of the 4pisky program, and
subsequent follow up observations were obtained up to 10 days
post-burst. Our observations at 15 GHz on 2016 Mar 17.59, Mar 18.78, Mar
20.79 and Mar 22.78 (UT) do not reveal any radio source at the XRT
location (Beardmore et al., GCN 20887), with 3sigma upper limits of 126
uJy, 246 uJy, 84 uJy and 111 uJy respectively.
We thank the AMI staff for scheduling these observations. The AMI-GRB
database is a log of all GRB follow up observations with the AMI, and is
available at http://4pisky.org/ami-grb/.
GCN Circular 20924
Subject
GRB 170317A: Mondy optical observations
Date
2017-03-20T15:19:06Z (9 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), A. Volnova (IKI)
report on behalf of larger GRB follow-up collaboration:
We observed the field of GRB 170317A (LaPorte et al., GCN 20885) with
AZT-33IK telescope of Sayan observatory (Mondy) starting on March, 18
(UT) 14:57:48. We several images in R-filter.
The optical afterglow (LaPorte et al., GCN 20885; Mazaeva et al., GCN
20886; Xin et al., GCN 20888; Mao et al., GCN 20889) is visible in
stacked images. Preliminary photometry of the afterglow is following
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2017-03-18 14:57:48 1.23738 R 30*120 23.25 0.22 23.6
The photometry is based on nearby USNO-B.10 stars
Ref.stars
USNO_B1_id R2
1405-0167631 15.69
1404-0169027 16.03
1405-0167512 16.85
1404-0169128 16.25
GCN Circular 20922
Subject
GRB 170317A: POLAR observation
Date
2017-03-19T19:12:35Z (9 years ago)
From
Haulin Xiao at PSI/POLAR <hualin.xiao@psi.ch>
H.L. Xiao (PSI), W. Hajdas (PSI) and R. Marcinkowski (PSI) report on behalf of the POLAR collaboration:
At 2017-03-17 09:45:56.0 UT(T0), during a routine on-ground search of data, POLAR detected GRB 170317A
(Swift BAT (trigger # 742866); LaPorte et al., GCN 20885).
The POLAR light curve consists of one peak with duration (T90) of 6.00 � 1.00 s measured from T0.
The 1.00 s peak flux at T0 + 5.50 s is equal to 370 � 50 counts/sec.
POLAR recorded 1500 events from the burst.
Above measurements are in the energy range of about 15 - 300 keV.
LC_URL: http://polar.psi.ch/triggers/GRB_170317A.png
Using the best location from Swift-BAT, which is (J2000):
RA : 93.087 [deg]
Dec: 50.500 [deg]
the incident angle in the POLAR coordinate at T0 is:
Theta: 81.38 [deg]
Phi: 4.61 [deg]
The analysis results presented above are preliminary. POLAR is a dedicated Gamma-Ray Burst polarimeter which was launched on-board the Chinese space
laboratory Tiangong-2 (TG-2) on Sep 15, 2016. The energy detection range of POLAR is ~ 50-500 keV.
More information about POLAR can be found at http://polar.psi.ch/pub ,
http://polar.ihep.ac.cn/en/ and http://isdc.unige.ch/polar/ .
This message is quotable in publications.
GCN Circular 20920
Subject
GRB 170317A: RATIR Optical and NIR Observations
Date
2017-03-19T15:18:09Z (9 years ago)
From
Alan M. Watson at Instituto de Astronomia UNAM <alan@astro.unam.mx>
Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC),
William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J.
Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (UVI),
Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz
(UCSC), Jes��s Gonz��lez (UNAM), Carlos Rom��n-Z����iga (UNAM), Harvey
Moseley (GSFC), John Capone (UMD), V. Zach Golkhou (ASU), and Vicki Toy
(UMD) report:
We observed the field of GRB 170317A (LaPorte et al., GCN 20885) with
the Reionization and Transients Infrared Camera (RATIR; www.ratir.org)
on the 1.5m Harold Johnson Telescope at the Observatorio Astron��mico
Nacional on Sierra San Pedro M��rtir from 2017/03 19.13 to 2017/03 19.30
UTC (41.26 to 45.37 hours after the BAT trigger), obtaining a total of
2.84 hours exposure in the r and i bands and 1.19 hours exposure in the
Z, Y, J, and H bands.
For a source within the enhanced Swift-XRT error circle (Beardmore et
al., GCN 20887), in comparison with the USNO-B1 and 2MASS catalogs, we
obtain the following detections and 3-sigma upper limits:
r 23.70 +/- 0.10
i 23.93 +/- 0.26
Z > 23.07
Y > 22.51
J > 22.27
H > 21.75
These magnitudes are in the AB system and are not corrected for Galactic
extinction in the direction of the GRB.
The source has faded by about a magnitude in r and i since our earlier
observations (Watson et al., GCN 20911).
We thank the staff of the Observatorio Astron��mico Nacional in San Pedro
M��rtir.
GCN Circular 20911
Subject
GRB 170317A: RATIR Optical and NIR Observations
Date
2017-03-18T17:10:21Z (9 years ago)
From
Nat Butler at UC berkeley <natxbutler@gmail.com>
Alan M. Watson (UNAM), Nat Butler (ASU), Alexander Kutyrev (GSFC), William
H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J. Xavier
Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (UVI), Eleonora
Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz
(UCSC), Jes��s Gonz��lez (UNAM), Carlos Rom��n-Z����iga (UNAM), Harvey Moseley
(GSFC), John Capone (UMD), V. Zach Golkhou (ASU), and Vicki Toy (UMD)
report:
We observed the field of GRB 170317A (LaPorte et al., GCN 20885) with the
Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the
1.5m Harold Johnson Telescope at the Observatorio Astron��mico Nacional on
Sierra San Pedro M��rtir from 2017/03 18.13 to 2017/03 18.30 UTC (17.37 to
21.38 hours after the BAT trigger), obtaining a total of 2.84 hours
exposure in the r and i bands and 1.19 hours exposure in the Z, Y, J, and H
bands.
For a source within the enhanced Swift-XRT error circle (Beardmore et al.,
GCN 20887), in comparison with the USNO-B1 and 2MASS catalogs, we obtain
the following detections and 3-sigma upper limits:
r 22.85 +/- 0.05
i 22.86 +/- 0.09
Z 22.92 +/- 0.30
Y 22.34 +/- 0.26
J 22.41 +/- 0.35
H > 21.95
These magnitudes are in the AB system and are not corrected for Galactic
extinction in the direction of the GRB.
We thank the staff of the Observatorio Astron��mico Nacional in San Pedro
M��rtir.
GCN Circular 20901
Subject
GRB 170317A: LCO FTN observations
Date
2017-03-18T09:56:26Z (9 years ago)
From
Cristiano Guidorzi at Ferrara U,Italy <guidorzi@fe.infn.it>
C. Guidorzi (U. Ferrara), S. Kobayashi, I.A. Steele (LJMU), A. Gomboc
(U. Nova Gorica), C.G. Mundell (U. Bath) on behalf of a large
collaboration report:
We observed Swift GRB 170317A (LaPorte et al. GCN 20885) on March 18,
06:01 UT (0.84 days since the GRB) with the 2-m LCO Faulkes Telescope
North with SDSS r and i filters. We marginally detect the optical
afterglow (LaPorte et al.; Mazaeva et al. GCN 20886, 20893; Xin et al.
GCN 20888; Mao et al. GCN 20889, 20890; Kuin et al. GCN 20894