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GRB 000214
TITLE: GCN GRB
OBSERVATION REPORT
NUMBER: 564
SUBJECT: GRB 000214 near-IR observations
DATE: 00/02/19 08:01:36 GMT
FROM: James Rhoads at STScI <rhoads@stsci.edu> James Rhoads (STScI), Andrew Wilson (U
Maryland), Thaisa Storchi-Bergmann (UFRGS), and Andrew Fruchter
(STScI) report:
We observed the field of GRB 000214 in the K' (2.1 micron) filter
on February 15.392 and on February 17.410 using the CTIO 4m
Blanco Telescope + OSIRIS imager, with net integration times of
180 seconds and 384 seconds respectively. Both epochs
covered the entire BeppoSAX NFI error circle (Antonelli et al,
GCNC 561).
We find no convincingly variable sources down to an approximate
first epoch 5 sigma limiting point source magnitude of K' =
18.15, or 34 microJansky (calibrated by observation of the
standard star S071-D). Assuming a normal, unobscured afterglow
spectral index (in the range -0.65 to -1.25 for f_nu) implies a
corresponding flux limit of 8 to 17 microJansky at 0.7 micron, or
roughly R=21.
The approximate 5 sigma point source limit for the second epoch
is K' = 19.1.
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TITLE: GCN GRB
OBSERVATION REPORT
NUMBER: 562
SUBJECT: GRB 000214, Radio Observations
DATE: 00/02/18 18:15:12 GMT
FROM: Dale A. Frail at NRAO <dfrail@nrao.edu> R. Subrahmanyan, M.H. Wieringa, R.M.
Wark, D. McConnell (ATNF), D. A. Frail (NRAO) and S. R. Kulkarni
(Caltech) report:
"We obtained a 8 hour integration with the Australia
Telescope Compact Array (ATCA) centered on February 17.92 UT at
4.8 GHz and 8.6 GHz. Within the 50-arcsec radius of the NFI error
circle (GCN 561), we find no radio sources above a 4-sigma level
of 235 microJy."
This message may be cited.
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TITLE: GCN GRB
OBSERVATION REPORT
NUMBER: 561
SUBJECT: GRB 000214 ``Valentine's Day Burst'': BeppoSAX NFI
Observation
DATE: 00/02/16 23:26:36 GMT
FROM: Angelo Antonelli at Obs. Astro. di
Roma <angelo@quasar.mporzio.astro.it> L.A. Antonelli, Osservatorio
Astronomico di Roma, Rome; L. Piro, Istituto di Astrofisica
Spaziale, CNR, Rome; G. Tarei, G. Tassone, C. De Libero, M.
Stornelli, D. Ricci, BeppoSAX Science Operations Center,
Telespazio, Rome; M. Capalbi, M.R. Daniele, BeppoSAX
Science Data Center, Rome; R.C. Butler, Agenzia Spaziale
Italiana, Rome; J. Heise, Space Research Organization
Netherlands, Utrecht; F. Frontera, Universita' di Ferrara,
Ferrara; report:
"GRB 000214 ``Valentine's Day Burst'' was observed with the
Narrow Field Instruments (NFI) on board BeppoSAX from Feb.
14.5479 to 15.0793 UT (starting about 12 hrs after the burst
trigger time). In the 2-10 keV image of all data from both MECS
units 2 and 3, a fading point source ( 1SAX J185427-6627.5 ) is
detected within the WFC error box (Paolino et al., GCN #557 and
#559). The source position is R.A. = 18h54m27.0s, Decl. =
-66d27'30" (Eq. 2000) with 50" error radius. In the
first 20,000 s the source had a 2-10 keV flux of 5E-13 erg/cmE2/s
and faded by a factor of two in the last 20,000 s. We conclude
that 1SAX J185427-6627.5 is the X-ray afterglow of GRB
000214."
This message may be cited.
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TITLE: GCN GRB
OBSERVATION REPORT
NUMBER: 559
SUBJECT: Correction to GCN 557 (GRB000214: BeppoSAX GRBM and WFC
Detection)
DATE: 00/02/15 17:27:20 GMT
FROM: Angelo Antonelli at Obs. Astro. di
Roma <angelo@quasar.mporzio.astro.it>
L.A. Antonelli, reports:
the coordinate of the X-ray counterpart published in the GCN #557
should be read: R.A.= 18h 54m 18s Decl.= -66 26'.3" (equinox
2000.0). Thanks to D. Frail for pointing out this error.
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TITLE: GCN GRB
OBSERVATION REPORT
NUMBER: 557
SUBJECT: GRB000214: BeppoSAX GRBM and WFC Detection
DATE: 00/02/15 13:22:43 GMT
FROM: Angelo Antonelli at Obs. Astro. di
Roma <angelo@quasar.mporzio.astro.it> A. Paolino, M. Stornelli, A. Coletta,
Scientific Operation Centre, Telespazio, Roma, L.A. Antonelli,
Osservatorio Astronomico di Roma, Roma, M.J.S. Smith, J. in 't
Zand, Space Research Organization Netherlands (SRON), Utrecht, C.
Guidorzi, Universita' di Ferrara, Ferrara, M. Feroci IAS/CNR,
Roma, report:
"The BeppoSAX Gamma Ray Burst Monitor (GRBM) and Wide Field
Camera (WFC unit 1) observed a gamma-ray burst on February 14.042
UT. A preliminary analysis reveals a duration of about 9 s in the
GRBM, with a peak photon countrate of 4.2E3 cts/s in the 40-700
keV energy band. In the WFC, the duration is about 115 s and the
peak flux is 2.9 Crab (2-26 keV). The position of the X-ray
counterpart is R.A.= 18h 4m 18s Decl.= -66 26'.3" (equinox
2000.0) with a 99% error radius of 6.5'. An NFI follow-up is
being carried on."
This message is citable.
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TITLE: GCN GRB
OBSERVATION REPORT
NUMBER: 556
SUBJECT: IPN annulus for GRB000214
DATE: 00/02/15 06:28:24 GMT
FROM: Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu> K. Hurley, on behalf of the Ulysses
GRB team, and M. Feroci, on behalf of the BeppoSAX GRBM team,
report:
Ulysses and the BeppoSAX GRBM observed GRB000214 (GCN 551, 552).
Triangulation gives an annulus centered at RA(2000)=153.560,
Decl(2000)=-41.892, with radius 65.114 +/- 0.021 degrees (3
sigma). This annulus intersects the refined WFC error
circle to make an ~30 sq. arcmin. error box whose corners are at:
RA(2000)
DEC(2000)
18 h 55 m 14.39 s -66 o 29 ' 35 "
18 h 53 m 34.70 s -66 o 21 ' 33 "
18 h 54 m 57.30 s -66 o 31 ' 31 "
18 h 53 m 19.47 s -66 o 23 ' 37 "
It also intersects the NFI error circle, reducing its area by a
factor of about 2, and making it likely that this is indeed the
counterpart to GRB000214.
Further refinement to this annulus is possible. A map may be
viewed at ftp://ssl.berkeley.edu/ipn3/000214 .
---------------------------------------------------------------------------------------------------------------
TITLE: GCN GRB
OBSERVATION REPORT
NUMBER: 552
SUBJECT: GRB000214: X-ray afterglow candidate
DATE: 00/02/14 14:52:19 GMT
FROM: Luigi Piro at IAS/CNR Frascati <piro@ias.rm.cnr.it>
A BeppoSAX follow up of GRB000214 with the Narrow Field
Instruments started around Feb.14 at 13:11 UT, i.e. 12 hours
after the GRB.
Preliminary analysis of the MECS (1.6-10 keV) data of the 1st
orbit shows a relatively strong, previously unknown source inside
the WFC error box at:
R.A.(2000)= 283.61
DEC(2000)= -66.477
with an error radius of 1.5'.
Luigi Piro
BeppoSAX Mission Scientist
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TITLE: GCN GRB
OBSERVATION REPORT
NUMBER: 551
SUBJECT: GRB000214 refined BeppoSAX-WFC position
DATE: 00/02/14 08:35:44 GMT
FROM: Luigi Piro at IAS/CNR Frascati <piro@ias.rm.cnr.it>
GRB000214 refined BeppoSAX-WFC position
Refined coordinates from WFC are:
R.A.(2000)= 283.576
DEC(2000)= -66.439
i.e. 1' off from the preliminary position The error radius is
6.5'
A follow-up pointing with the Narrow Field Instruments of
BeppoSAX is being planned
Luigi Piro
BeppoSAX Mission Scientist
---------------------------------------------------------------------------------------------------------------
TITLE: GCN GRB
OBSERVATION REPORT
NUMBER: 550
SUBJECT: BeppoSAX GRB000214 ("S. Valentine's day
GRB")
DATE: 00/02/14 05:21:06 GMT
FROM: Luigi Piro at IAS/CNR Frascati <piro@ias.rm.cnr.it>
For GRB lovers, on S. Valentine's day:
On Feb.14 at 01:01:01 a GRB (GRB000214) has been detected
by the GRBM and WFC1 of BeppoSAX.
Preliminary coordinates from WFC are:
R.A.(2000)= 283.573
DEC(2000)= -66.455
The attitude configuration at the time of the GRB introduces a
systematic error in the position. At this stage of the analysis
we estimate a total error of about 8' in radius.
Luigi Piro
BeppoSAX Mission Scientist
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