GRB 140622A

V. D'Elia (ASDC), S. D. Barthelmy (GSFC), L. Izzo (URoma/ICRA) and
M. H. Siegel (PSU) report on behalf of the Swift Team:

At 09:36:04 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 140622A (trigger=602278).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 317.152, -14.430 which is 
   RA(J2000)  =  21h 08m 37s
   Dec(J2000) = -14d 25' 48"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows a single spike
with a duration of about 0.1 sec.  The peak count rate
was ~2200 counts/sec (15-350 keV), at ~0 sec after the trigger. 

The XRT began observing the field at 09:37:37.9 UT, 93.4 seconds after
the BAT trigger. Using promptly downlinked data we find an uncatalogued
X-ray source with an enhanced position: RA, Dec 317.1730, -14.4193
which is equivalent to:
   RA(J2000)  = 21h 08m 41.53s
   Dec(J2000) = -14d 25' 09.5"
with an uncertainty of 2.6 arcseconds (radius, 90% containment). This
location is 82 arcseconds from the BAT onboard position, within the BAT
error circle. This position may be improved as more data are received;
the latest position is available at http://www.swift.ac.uk/sper. 

A power-law fit to a spectrum formed from promptly downlinked event
data gives a column density consistent with the Galactic value of 5.47
x 10^20 cm^-2 (Willingale et al. 2013). 

UVOT took a finding chart exposure of 150 seconds with the White filter
starting 96 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of
the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. 
The 8'x8' region for the list of sources generated on-board covers 100% of the
XRT error circle. The list of sources is typically complete to about 18 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.07. 

Burst Advocate for this burst is V. D'Elia (delia AT asdc.asi.it). 
Please contact the BA by email if you require additional information
regarding Swift followup of this burst. In extremely urgent cases, after
trying the Burst Advocate, you can contact the Swift PI by phone (see
Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) 
report on behalf of the Swift-XRT team.

Using 451 s of XRT Photon Counting mode data and 1 UVOT
images for GRB 140622A, we find an astrometrically corrected X-ray
position (using the XRT-UVOT alignment and matching UVOT field sources
to the USNO-B1 catalogue): RA, Dec = 317.17317, -14.41931 which is equivalent
to:

RA (J2000): 21h 08m 41.56s
Dec (J2000): -14d 25' 09.5"

with an uncertainty of 2.6 arcsec (radius, 90% confidence).

This position may be improved as more data are received. The latest
position can be viewed at http://www.swift.ac.uk/xrt_positions. Position
enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans
et al. (2009, MNRAS, 397, 1177).

This circular was automatically generated, and is an official product of the
Swift-XRT team.

M. Tanga, C. Delvaux and J. Greiner (all MPE Garching) report on behalf of
the GROND team:

We observed the field of GRB 140622A (Swift trigger 602278; D'Elia et al.,
GCN #16433
Loading...
 
 ) 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 09:40 UT on June 22, 2014, 0.07 hours after the
GRB trigger. They were performed at an average seeing of 1.3 and at an
average airmass of 1.23.

We do not detect a source within the Swift-XRT error circle reported by
D'Elia et al. (GCN  #16433
Loading...
 
 ) down to the following 3-sigma AB magnitudes:

g' > 24.3 mag,
r' > 24.3 mag,
i' > 24.1 mag,
z' > 24.1 mag,
J > 21.3 mag,
H > 20.9 mag, and
K > 19.4 mag.

We report the detection of a faint object at the border of the 2.6"
Swift-XRT error circle at coordinates

   RA(J2000)  =  21:08:41.73
   Dec(J2000) = -14:25:06.5

This object is detected in g', r', i', z' and J and there is no evidence
of fading. Its estimated AB magnitudes are

g' = 23.4 +/- 0.2 mag,
r' = 23.4 +/- 0.2 mag,
i' = 22.5 +/- 0.1 mag,
z' = 22.2 +/- 0.1 mag, and
J = 20.9 +/- 0.3 mag.

At this time, we cannot assert that this object is the host galaxy of GRB
140622A.

The given limits and magnitudes are derived based on calibrating the
images against GROND zeropoints and 2MASS field stars and are not
corrected for the Galactic foreground extinction corresponding to a
reddening of E_(B-V)= 0.07 mag in the direction of the burst (Schlegel et
al. 1998).

[GCN OPS NOTE(22jun14):  Per author's request, the Subject line was corrected
from "140422A" to 140622A".]

Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William
H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB),
J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara
(ORAU/GSFC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico
Ramirez-Ruiz (UCSC), Jos�� A. de Diego (UNAM), Leonid Georgiev (UNAM), Jes��s
Gonz��lez (UNAM), Carlos Rom��n-Z����iga (UNAM), Neil Gehrels (GSFC), and
Harvey Moseley (GSFC) report:

We observed the field of short-duration GRB 140622A (D'Elia, et al., GCN
16433
Loading...
 
 ) 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 2014/06 22.40 to
2014/06 22.47 UTC (1.2 minutes to 1.70 hours after the BAT trigger),
obtaining a total of 1.20 hours exposure in the r and i bands and 0.51
hours exposure in the Z and Y bands.

For a source within the Swift-XRT error circle (Osborne, et al., GCN
16434
Loading...
 
 ), in comparison with 2MASS, we obtain the following upper limits
(3-sigma):

  r     > 23.64
  i     > 23.49
 Z     > 19.41
  Y     > 18.73

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.

O.E. Hartoog (API/UvA), D. Malesani (DARK/NBI), R. Sanchez-Ramirez
(IAA-CSIC), A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), A.J. Levan (U. of
Warwick), J.P.U. Fynbo (DARK/NBI), P.M. Vreeswijk (Weizmann), L. Kaper
(API/UvA) report on behalf of the X-shooter GRB collaboration:

We observed the field of short GRB140622A (D'Elia et al., GCN 16433
Loading...
 
 ) with
the VLT X-shooter spectrograph covering a spectral range 3200A to 18000A,
with a total exposure time of 2x600s. Observations started at UT 10:10:32,
~34 minutes after the trigger. The slit was positioned on the object at
RA(J2000)  =  21:08:41.73, Dec(J2000) = -14:25:06.5 identified by Tanga et
al. (GCN 16435
Loading...
 
 ), at the border of the 2.6" XRT error circle.

We detect emission lines from this source at a redshift of z~0.959:
H-alpha, H-beta, [OII], [OIII]. It is likely that this is the host galaxy
of GRB140622A. A very faint trace is detected redwards of ~7000A. This
wavelength coincides with a Balmer jump at the host redshift.

We thank the staff at Paranal for their support in obtaining these
observations.

T. Sakamoto (AGU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),
J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),
A. Y. Lien (NASA/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL),
M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU)
(i.e. the Swift-BAT team):

  Using the data set from T-61 to T+302 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 140622A (trigger #602278) (D'Elia, et al.,
GCN Circ. 16433
Loading...
 
 ).  The BAT ground-calculated position is
RA, Dec = 317.153, -14.412 deg which is

    RA(J2000)  =  21h 08m 36.7s
    Dec(J2000) = -14d 24' 44.6"

with an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 57%.

The mask-weighted light curve shows a single FRED peak.  T90 (15-350 keV) is
0.13 +- 0.04 sec (estimated error including systematics).

The time-averaged spectrum from T-0.02 to T+0.13 sec is best fit (chisqr = 0.63) by
a black body spectrum with kT = 11.6 � 1.8 keV.  A simple power-law model is a
relatively poor fit (chisqr 1.13), with a photon index of 3.08 � 0.29.  A power-law
with an exponential cutoff at 44 � 8 keV nominally fits the data almost as well
(chisqr = 0.64) as the black body fit, but the power-law index below the cutoff
energy and the normalization are poorly defined.  The fluence in the 15-150 keV
band using the black body spectrum is (2.7 � 0.5) x 10^-08 erg/cm2.  The 1-sec
peak photon flux measured from T-0.45 sec in the 15-150 keV band is
0.6 � 0.2 ph/cm2/sec.  All the quoted errors are at the 90% confidence level.

 From the BAT spectrum, this event does not appear to be a short hard burst.  The
quickly fading X-ray lightcurve, however (to be reported in a later circular), does
appear consistent with a SHB, and does not appear to be similar to the lightcurves
of SGRs or other Galactic sources.

The results of the batgrbproduct analysis are available at
http://gcn.gsfc.nasa.gov/notices_s/602278/BA/

D.N. Burrows (PSU), J.A. Kennea (PSU), P.A. Evans (U. Leicester), B.P.
Gompertz (U. Leicester), J.P. Osborne (U. Leicester), M. de Pasquale
(INAF-IASFPA), A. Maselli  (INAF-IASFPA), V. Mangano (PSU) and V.
D'Elia report on behalf of the Swift-XRT team:

We have analysed 7.3 ks of XRT data for GRB 140622A (D'Elia  et al. GCN
Circ. 16433
Loading...
 
 ),  from 103 s to 30.9 ks after the	BAT trigger. The data
are entirely in Photon Counting (PC) mode. The enhanced XRT position
for this burst was given by Osborne et al. (GCN Circ. 16434
Loading...
 
 ).

The light curve can be modelled with  a power-law decay with a decay
index of alpha=7.1 (+/-0.9).


If the light curve continues to decay with a power-law decay index of
7.1, the count rate at T+24 hours will be 5.3 x 10^-21 count s^-1

The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_products/00602278.

This circular is an official product of the Swift-XRT team.

WeiKang Zheng, Alexei V. Filippenko, Adam Morgan (UC Berkeley), and
S. B. Cenko (NASA/Goddard Space Flight Center) report on behalf of the
KAIT GRB team:

The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at
Lick Observatory, responded to Swift GRB 140622A (D'Elia et al.,
GCN 16433
Loading...
 
 ) starting at 09:39:22 UT, 198 s after the burst.
Observations were performed with an automatic sequence in the
clear (roughly R), V, and I filters, and the exposure time was
20 s per image. We do not detect any new source in our
images within the enhanced XRT error circle (Osborne et al.,
GCN 16434
Loading...
 
 ). The typical limiting magnitude of our single clear
image is about 19.0 calibrated to USNO B1.0.

F. E. Marshall (NASA/GSFC) and V. D'Elia (ASDC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 140622A
97 s after the BAT trigger (D'Elia et al. GCN Circ. 16433
Loading...
 
 ).
No optical afterglow consistent with the XRT position
(Osborne et al. GCN Circ. 16434
Loading...
 
 ) is detected in the initial UVOT exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first
finding chart (FC) exposure and subsequent exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC            97          246          147         >21.2
u_FC               309          559          246         >20.0
white               97         1358          373         >21.2
v                  639         1407           97         >19.6
b                  564         1334           78         >20.1
u                  309         1309          304         >20.2
w1                 688         1285           58         >19.6
m2                 663         1260           78         >20.6
w2                 614         1383           97         >20.2

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.07 in the direction of the burst
(Schlegel et al. 1998).

D. Kawamura, T. Sakamoto, A. Yoshida (AGU)

We observed the field of GRB 140622A detected by Swift (trigger #602278; 
D'Elia et al., GCN Circ. 16433
Loading...
 
 ) with the iTelescope.Net (http://www.itelescope.net) 
T11 (0.51 m Planewave) telescope located at the New Mexico Skies Observatory 
(NM, USA).  

60 images of 60 sec exposures were taken in the R filter starting from June 22 09:50:33 (UT) 
about 14.5 minutes after the trigger and stopped on June 22 11:01:25 (UT).  We do not detect 
the optical afterglow both in the individual images and the stacked image at the enhanced X-ray 
afterglow position (Osborne et al., GCN Circ. 16434
Loading...
 
 ).  The estimated five sigma upper limit of 
the combined image (total exposure of 3600 sec) is ~18.5 using the USNO-B1 catalog.

Klotz A., Turpin D. (IRAP-CNRS-OMP),
Boer M., Gendre B., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA),
Atteia J.L. (IRAP-CNRS-OMP) report:

We imaged the field of GRB 140622 detected by SWIFT
(trigger 602278) with the TAROT robotic telescope (D=25cm)
located at the European Southern Observatory,
La Silla observatory, Chile.

The observations started 23.2s after the GRB trigger
(12.7s after the notice). The elevation of the field decreased from
61 degrees above horizon and weather conditions
were excellents. Images were not accessible during one week
due to a disk access problem.

The first image is trailed with a duration of 60.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+23.2s to t0+83.2s : R > 17.5

The second image is 30.0s exposure in tracking mode:
t0+96.6s to t0+126.6s : R > 18.0

We co-added a series of exposures:
t0+96.6s to t0+389.1s : R > 18.4

Magnitudes were estimated with the nearby USNO-B1 stars
and are not corrected for galactic dust extinction.