- GCN NOTICE
TITLE: GCN/FERMI NOTICE
NOTICE_DATE: Thu 09 Feb 17 01:09:02 UT
NOTICE_TYPE: Fermi-GBM Flight Position
RECORD_NUM: 43
TRIGGER_NUM: 508295323
GRB_RA: 107.133d {+07h 08m 32s} (J2000),
107.256d {+07h 09m 01s} (current),
106.776d {+07h 07m 06s} (1950)
GRB_DEC: -46.800d {-46d 47' 59"} (J2000),
-46.828d {-46d 49' 40"} (current),
-46.719d {-46d 43' 07"} (1950)
GRB_ERROR: 10.32 [deg radius, statistical plus systematic]
GRB_INTEN: 239 [cnts/sec]
DATA_SIGNIF: 10.90 [sigma]
INTEG_TIME: 2.048 [sec]
GRB_DATE: 17793 TJD; 40 DOY; 17/02/09
GRB_TIME: 4118.08 SOD {01:08:38.08} UT
GRB_PHI: 105.00 [deg]
GRB_THETA: 115.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO: 0.99
LOC_ALGORITHM: 3 (version number of)
MOST_LIKELY: 97% GRB
2nd_MOST_LIKELY: 1% Generic Transient
DETECTORS: 0,0,0, 0,0,0, 0,0,0, 1,1,0, 0,0,
SUN_POSTN: 322.87d {+21h 31m 30s} -14.66d {-14d 39' 46"}
SUN_DIST: 110.70 [deg] Sun_angle= -9.6 [hr] (East of Sun)
MOON_POSTN: 116.42d {+07h 45m 41s} +17.99d {+17d 59' 40"}
MOON_DIST: 65.35 [deg]
MOON_ILLUM: 95 [%]
GAL_COORDS: 257.48,-16.68 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 123.03,-68.28 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170209048/quicklook/glg_lc_medres34_bn170209048.gif
COMMENTS: Fermi-GBM Flight-calculated Coordinates.
COMMENTS: This trigger occurred at longitude,latitude = 198.17,-9.02 [deg].
COMMENTS: The LC_URL file will not be created until ~15 min after the trigger.
- GCN NOTICE
TITLE: GCN/FERMI NOTICE
NOTICE_DATE: Thu 09 Feb 17 01:09:11 UT
NOTICE_TYPE: Fermi-GBM Flight Position
RECORD_NUM: 56
TRIGGER_NUM: 508295323
GRB_RA: 99.900d {+06h 39m 36s} (J2000),
99.982d {+06h 39m 56s} (current),
99.662d {+06h 38m 39s} (1950)
GRB_DEC: -55.717d {-55d 43' 00"} (J2000),
-55.733d {-55d 43' 58"} (current),
-55.669d {-55d 40' 09"} (1950)
GRB_ERROR: 5.20 [deg radius, statistical plus systematic]
GRB_INTEN: 767 [cnts/sec]
DATA_SIGNIF: 30.30 [sigma]
INTEG_TIME: 1.024 [sec]
GRB_DATE: 17793 TJD; 40 DOY; 17/02/09
GRB_TIME: 4118.08 SOD {01:08:38.08} UT
GRB_PHI: 94.00 [deg]
GRB_THETA: 115.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO: 0.63
LOC_ALGORITHM: 3 (version number of)
MOST_LIKELY: 96% GRB
2nd_MOST_LIKELY: 3% Generic Transient
DETECTORS: 0,0,0, 0,0,0, 0,0,0, 1,1,0, 0,0,
SUN_POSTN: 322.87d {+21h 31m 30s} -14.66d {-14d 39' 46"}
SUN_DIST: 100.95 [deg] Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN: 116.42d {+07h 45m 41s} +17.99d {+17d 59' 39"}
MOON_DIST: 75.03 [deg]
MOON_ILLUM: 95 [%]
GAL_COORDS: 265.01,-23.74 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 118.22,-78.18 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170209048/quicklook/glg_lc_medres34_bn170209048.gif
COMMENTS: Fermi-GBM Flight-calculated Coordinates.
COMMENTS: This trigger occurred at longitude,latitude = 198.17,-9.02 [deg].
COMMENTS: The LC_URL file will not be created until ~15 min after the trigger.
- GCN NOTICE
TITLE: GCN/FERMI NOTICE
NOTICE_DATE: Thu 09 Feb 17 01:09:16 UT
NOTICE_TYPE: Fermi-GBM Ground Position
RECORD_NUM: 55
TRIGGER_NUM: 508295323
GRB_RA: 106.370d {+07h 05m 29s} (J2000),
106.470d {+07h 05m 53s} (current),
106.078d {+07h 04m 19s} (1950)
GRB_DEC: -52.580d {-52d 34' 47"} (J2000),
-52.607d {-52d 36' 24"} (current),
-52.502d {-52d 30' 07"} (1950)
GRB_ERROR: 2.28 [deg radius, statistical only]
DATA_SIGNIF: 35.20 [sigma]
DATA_INTERVAL: 1.024 [sec]
GRB_DATE: 17793 TJD; 40 DOY; 17/02/09
GRB_TIME: 4118.08 SOD {01:08:38.08} UT
GRB_PHI: 99.00 [deg]
GRB_THETA: 117.00 [deg]
E_RANGE: 44.032 - 279.965 [keV]
LOC_ALGORITHM: 4153 (Gnd S/W Version number)
SUN_POSTN: 322.87d {+21h 31m 30s} -14.66d {-14d 39' 46"}
SUN_DIST: 105.77 [deg] Sun_angle= -9.6 [hr] (East of Sun)
MOON_POSTN: 116.42d {+07h 45m 41s} +17.99d {+17d 59' 39"}
MOON_DIST: 71.13 [deg]
MOON_ILLUM: 95 [%]
GAL_COORDS: 262.97,-19.21 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 128.03,-73.86 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170209048/quicklook/glg_lc_medres34_bn170209048.gif
POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_508295323.fits
COMMENTS: Fermi-GBM Ground-calculated Coordinates.
COMMENTS: This Notice was ground-generated -- not flight-generated.
COMMENTS: The LC_URL file will not be created/available until ~15 min after the trigger.
COMMENTS: The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.
- GCN Circular #20650
R.Podesta, C.Lopez, F. Podesta
Observatorio Astronomico Felix Aguilar (OAFA) , National University of San
Juan, Argentina
H. Levato, C. Saffe
Instituto de Ciencias Astronomicas,de la Tierra y del Espacio (ICATE),
San Juan, Argentina
V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina,
A.V.Krylov, I.Gorbunov, P.Balanutsa, A.Kuznetsov, V.V.Chazov
Lomonosov Moscow State University, Sternberg Astronomical Institut of MSU
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk
Irkutsk State University
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov
Blagoveschensk Educational State University, Blagoveschensk
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Senik
Kislovodsk Solar Station of the Pulkovo Observatory
D.Buckley, S. Potter, A.Kniazev, M.Kotze
South African Astronomical Observatory
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias
MASTER-OAFA robotic telescope (MASTER-Net: http://observ.pereplet.ru) located
in OAFA
was starting inspection of the FERMI trigger 508295323 (GRB170209.05)
error-box (ra=07h 33m 36s dec=-49d 38' 23" r=3.22
https://gcn.gsfc.nasa.gov/other/508295323.fermi GRB_TIME: 2017-02-09
01:08:38.08UT)
112 sec after trigger time at 2017-02-09 01:10:30 UT.
The 5-sigma upper limit on our 60s exposure set is 18.6 mag .
MASTER OT J072307.30-521446.6 discovery - possible optical counterpart of Fermi
During Fermi 508295323 trigger (
https://gcn.gsfc.nasa.gov/other/508295323.fermi GRB_TIME: 2017-02-09
01:08:38.08UT) inspection
MASTER-OAFA auto-detection system discovered new OT source at
(RA, Dec) = 07h 23m 07.30s -52d 14m 46.6s
on 2017-02-09 02:07:07.478UT with unfiltered m_OT=17.4 (mlimit=18.1m).
The second image is on 02:14:07.83 UT with m_OT=17.4.
There are only 2 inspection images of this area, the GRB_ERROR was 3.22 deg
radius, and we cover full field in inspection mode by 2 images.
There is no minor planet at this place. There is no any sources in VIZIER
database, it means 22mag upper limit in POSS (Palomar) images.
We have reference image without OT on 2017-01-29.17249 UT with 19.6 unfiltered
magnitude limit.
MASTER-SAAO reobserved it on 2017-02-09 18:37:14UT (sunset in SAAO, Sun
altitude is -12.0).
There is no OT brighter 18.7m.
Deep photometry and spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/072307.30-521446.6.png
The detection made on zenit distance = 76 degrees, galaxy latitude b = -83
degree.
The sun altitude was -24 degree.
The moon ( 0 % bright part) was below the horizon (the altitude of the Moon is
-14 degree ).
The message may be cited.
- GCN Circular #20652
O.J. Roberts (USRA/NASA) and C. Meegan (UAH)
report on behalf of the Fermi GBM Team:
"At 01:08:38.08 UT on the 9th of February 2017,
the Fermi Gamma-Ray Burst Monitor triggered and
located GRB 170209A (trigger 508295323 / 170209048),
for which MASTER reported an OT in follow-up
observations of the reported GBM location region
(Podesta et al. 2017, GCN 20650). The on-ground
calculated location using the GBM trigger data is,
RA = 113.40, DEC = -49.64 (J2000 degrees), equivalent
to J2000 7h 33m, -49d 38',
with an uncertainty of 3.22 degrees (radius, 1-sigma
containment, statistical only; there is additionally
a systematic error which we have characterized as a
core-plus-tail model, with 90% of GRBs having a 3.7 deg.
error and a small tail suffering a larger than 10 deg.
systematic error [Connaughton et al. 2015, ApJS, 216, 32]).
The angle from the Fermi LAT boresight at the GBM trigger
time is 120 degrees.
The GBM light curve consists of a long GRB with two bright
episodes of emission over a duration (T90) of about 40 s
(50-300 keV). The time-averaged spectrum from T0+0 s to
T0+40.0 s is best fit by a power law function with an
exponential high-energy cutoff. The power law index is
-0.95 +/- 0.07 and the cutoff energy, parameterized as
Epeak is 132 +/- 9 keV.
The event fluence (10-1000 keV) in this time interval is
(9.34 +/- 0.37)E-06 erg/cm^2. The 1-sec peak photon flux
measured starting from T0+1.9 s in the 10-1000 keV band
is 12.6 +/- 0.4 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
- GCN Circular #20656
K. Hurley, on behalf of the IPN,
I. G. Mitrofanov, D. Golovin, M. L. Litvak, and A. B. Sanin,
on behalf of the HEND-Odyssey GRB team,
A. Kozlova, S. Golenetskii, R. Aptekar, D. Frederiks, D. Svinkin,
and T. Cline on behalf of the Konus-Wind team,
V. Connaughton, M. S. Briggs, C. Meegan, V. Pelassa,
and A. Goldstein, on behalf of the Fermi GBM team,
A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo,
and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,
and
W. Boynton, C. Fellows, K. Harshman, H. Enos, and R. Starr,
on behalf of the GRS-Odyssey GRB team, report:
The long-duration GRB 170209A
(Fermi GBM Detection: Roberts & Meegan, GCN Circ. 20652)
has been detected by Fermi (GBM), Konus-Wind, INTEGRAL (SPI-ACS),
and Mars-Odyssey (HEND), so far, at about 4118 s UT (01:08:38).
We have triangulated it to a preliminary, 3 sigma error box whose
coordinates are:
---------------------------------------------
RA(2000), deg Dec(2000), deg
---------------------------------------------
Center:
110.686 (07h 22m 45s) -51.959 (-51d 57' 34")
Corners:
111.873 (07h 27m 29s) -55.694 (-55d 41' 38")
111.366 (07h 25m 28s) -55.308 (-55d 18' 29")
109.742 (07h 18m 58s) -48.166 (-48d 09' 58")
110.149 (07h 20m 36s) -48.575 (-48d 34' 30")
---------------------------------------------
The error box area is 1.66 sq. deg, and its maximum
dimension is 7.64 deg (the minimum one is 13.1 arcmin).
The Sun distance was 105 deg.
This box may be improved.
The distance between the narrowest annulus (GBM-HEND annulus with
3 sigma half width of 0.109 deg) center line and the optical transient
J072307.30-521446.6 (Podesta et al., GCN Circ. 20650) is 1 arcmin,
supporting the association of the transient and the GRB.
A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB170209_T04120/IPN/
The Konus-Wind time history and spectrum will be given in a forthcoming
GCN Circular.
- GCN Circular #20658
P. A. Evans (U. Leicester) reports on behalf of the Swift team:
Swift has initiated a ToO observation of the IPN GRB 170209A.
Automated analysis of the XRT data will be presented online at
http://www.swift.ac.uk/ToO_GRBs/00020739
Any uncatalogued X-ray sources detected in this analysis will be
reported on this website and via GCN COUNTERPART notices. These are
not necessarily related to the IPN event. Any X-ray source
considered to be a probable afterglow candidate will be reported via a
GCN Circular after manual consideration.
Details of the XRT automated analysis methods are detailed in Evans et
al. (2007, A&A, 469, 379; 2009, MNRAS, 397, 1177 and 2014, ApJS, 210, 8).
This circular is an official product of the Swift-XRT team.
- GCN Circular #20659
D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, P. Oleynik,
M. Ulanov, A. Tsvetkova, A. Lysenko, and T. Cline
on behalf of the Konus-Wind team, report:
The long-duration GRB 170209A
(Fermi-GBM detection: Roberts and Meegan, GCN Circ. 20652;
IPN triangulation: Hurley et al., GCN Circ. 20656)
triggered Konus-Wind at T0=4120.061 s UT (01:08:40.061).
The burst light curve shows two multipeaked episodes
started at ~T0-2 s with a total duration of ~40 s.
The emission is seen up to ~1 MeV.
The Konus-Wind light curve of this GRB is available at
http://www.ioffe.ru/LEA/GRBs/GRB170209_T04120/
As observed by Konus-Wind, the burst
had a fluence of 8.35(-0.69,+0.76)x10^-6 erg/cm2,
and a 64-ms peak flux, measured from T0+1.904 s,
of 2.75(-0.80,+0.84)x10^-6 erg/cm2/s
(both in the 20 keV - 10 MeV energy range).
The time-averaged spectrum of the burst
(measured from T0 to T0+41.216 s)
is best fit in the 20 keV - 2 MeV range
by a power law with exponential cutoff model:
dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)
with alpha = -0.59(-0.30,+0.35)
and Ep = 126(-13,+18) keV (chi2 = 68/60 dof).
Fitting by a GRB (Band) model yields the same alpha and Ep,
and an upper limit on the high energy photon index: beta < -2.6
(chi2 = 68/59 dof).
The spectrum near the maximum count rate
(measured from T0+0.256 to T0+8.448 s)
is best fit in the 20 keV - 2 MeV range
by a power law with exponential cutoff model:
with alpha = -0.92(-0.31,+0.35)
and Ep = 164(-28,+47) keV (chi2 = 60/60 dof).
Fitting by a GRB (Band) model yields the same alpha and Ep,
and an upper limit on the high energy photon index: beta < -2.2
(chi2 = 60/59 dof).
All the quoted errors are at the 90% confidence level.
All the quoted values are preliminary.
- GCN Circular #20662
B. Mingo (U. Leicester), A.P. Beardmore (U. Leicester), V. D'Elia
(ASDC), A. D'Ai (INAF-IASFPA), A. Melandri (INAF-OAB), D.N. Burrows
(PSU), A. Cholden-Brown (PSU), S. J. LaPorte (PSU) and P.A. Evans (U.
Leicester) report on behalf of the Swift-XRT team:
Swift-XRT has performed follow-up observations of the IPN-detected
burst GRB 170209A (Roberts et al. GCN Circ. 20652), collecting 5.0 ks
of Photon Counting (PC) mode data between T0+134.5 ks and T0+153.7 ks.
No X-ray sources have been detected consistent with being within 16
arcsec of the MASTER-OAFA position. The 3-sigma upper limit in the
field ranges from ~0.002 to ~0.005 ct s^-1, corresponding to a 0.3-10
keV observed flux of 8.6e-14 to 2.0e-13 erg cm^-2 s^-1 (assuming a
typical GRB spectrum).
The results of the XRT-team automatic analysis of the XRT observations,
including a position-specific upper limit calculator, are available at
http://www.swift.ac.uk/ToO_GRBs/00020739.
This circular is an official product of the Swift-XRT team.
- GCN Circular #20670
V. Sharma and D. Bhattacharya (IUCAA), V. Bhalerao (IITB), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:
Analysis of AstroSat CZTI data showed a clear detection of GRB 170209A (Fermi GBM detection: O.J. Roberts et al., GCN Circ. 20652) in the 40-200 keV energy range. The light curve showed multiple peaks emission. The first emission peak occurred at 01:08:40.08 UT, 2 s after the Fermi trigger and a second group of emission peaked at ~34 s after the trigger. An interval of ~9 s between these two showed no detectable emission. The measured peak count rate was 245.1 counts/s above the background in combined data of four quadrants, with a total 1453.0 counts. The local mean background count rate was 343.9 counts/s. Using cumulative rates, we measured a T90 of 40.4 s.
It was clearly detected in the CsI anticoincidence detector (Veto) also as bright detection in the 100-500 keV energy range.
CZTI GRB detections are reported regularly on the payload site at http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project.
- GCN Circular #20680
P. Schady, J. Greiner (both MPE Garching), and S. Steinmassl (TU Munich),
report:
We observed the field of the optical transient reported by MASTER
(Podesta et al. 2017, GCN #20650) of GRB 170209A (Fermi/GBM trigger 508295323;
Roberts & Meegan 2017, GCN #20652) simultaneously in g'r'i'z'JHK with GROND
(Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG telescope at
ESO La Silla Observatory (Chile).
Observations started at 03:16 UT on 2017-02-10, 26 hrs after the GRB trigger,
resulting in 36 min of total exposures in g'r'i'z' and 30 min in JHK.
They were performed at an average seeing of 2.3" and at an airmass of 1.1.
A second epoch observation was started at 03:03 UT on 2017-02-15, around 6 days
after the GRB trigger, resulting in 72 min of total exposures in g'r'i'z' and
60 min in JHK. Seeing conditions were better, around 1.3".
We detect two sources close to the MASTER position: the fainter one, to the
North-West, has faded by more than 1.2 mag, while the second source (to the
South-West) stayed constant within the errors.
The position of the fading object is
RA (2000.0) = 07:23:07.19
Decl.(2000.0) = -52:14:45.5
with an error of +-0.3", and about 1.5 arcsec from the MASTER position.
We find the following magnitudes of the fading object:
epoch 1 epoch 2
g' > 23.5 mag > 24.6 mag
r' = 23.4 +- 0.1 mag > 24.6 mag
i' = 23.3 +- 0.3 mag > 24.2 mag
z' = 23.1 +- 0.3 mag > 24.2 mag
J > 21.3 mag > 21.7 mag
H > 21.0 mag > 21.3 mag
K > 19.3 mag > 19.7 mag
The close match with the MASTER object, the fading and the powerlaw-like
r'i'z colors confirm the nature of this object as the afterglow of
GRB 170209A, as suggested also by Hurley et al. 2017, GCN #20656 based
purely on the positional coincidence.
Given magnitudes are calibrated against GROND zeropoints and 2MASS field stars
and are not corrected for the Galactic foreground extinction corresponding to
a reddening of E(B-V)= 0.12 mag in the direction of the burst (Schlafly &
Finkbeiner 2011).
We thank the support astronomer, S. Ciceri, for the support of the observations.
Previous IAU Circulars 
