TITLE:   GCN CIRCULAR
NUMBER:  20821
SUBJECT: LIGO/Virgo G275697: Further Swift-XRT sources
DATE:    17/03/06 13:19:30 GMT
FROM:    Kim Page at U of Leceister  <klp5@le.ac.uk>

P.A. Evans (U. Leicester), J.A. Kennea (PSU), S.D. Barthelmy
(NASA/GSFC), A.P. Beardmore (U. Leicester), A.A. Breeveld (UCL-MSSL),
D.N. Burrows (PSU), S. Campana (INAF-OAB), S.B. Cenko (NASA/GSFC), G.
Cusumano (INAF-IASF PA), A. D'Ai (INAF-IASFPA), P. D'Avanzo (INAF-OAB),
V.D'Elia(ASDC), P. Giommi (ASI), C. Gronwall (PSU), H.A. Krimm
(CRESST/GSFC/USRA), N.P.M. Kuin (UCL-MSSL), A.Y. Lien (GSFC/UMBC), D.
Malesani (DARK/NBI), F.E. Marshall (NASA/GSFC), A. Melandri (INAF-OAB),
B. Mingo (U. Leicester),  J.A. Nousek (PSU), S.R. Oates (U. Warwick),
P.T. O'Brien (U. Leicester), J.P. Osborne (U. Leicester), C. Pagani (U.
Leicester), K.L. Page (U.Leicester), D.M. Palmer (LANL), M. Perri
(ASDC), J.L. Racusin (NASA/GSFC), B. Sbarufatti (INAF-OAB/PSU), M.H.
Siegel (PSU), G. Tagliaferri (INAF-OAB), E. Troja (NASA/GSFC/UMCP)
report on behalf of the Swift team:

Swift has performed a series of 1751 observations, covering 1408
separate locations within the LVC error region for the GW trigger
G275697 convolved with the 2MPZ catalogue, using the 'bayestar' GW
localisation map. As this is a 3D skymap, galaxy distances were taken
into account in selecting which ones to observe. The observations
currently span from 15 ks to 534 ks after the LVC trigger, and cover
171 sq degrees on the sky (corrected for overlaps). This covers 0.16 of
the probability in the LVC skymap, and 0.31 of the probability in the
LVC map after convolving with the 2MPZ galaxy catalogue, as described
by Evans et al., (2016, MNRAS,	462, 1591).

Since the last Swift GCN, we have detected 31 X-ray sources, these are
either new detections, or have been given a higher 'rank' than in the
last circular. Each source is assigned a rank of 1-4 which describes
how likely it is to be related to the GW trigger, with 1 being the most
likely and 4 being the least likely. The ranks are described at
http://www.swift.ac.uk/ranks.php.

We have found:

  * 0 sources of rank 1
  * 0 sources of rank 2
  * 12 sources of rank 3
  * 19 sources of rank 4

For all flux conversions and comparisons with catalogues and upper
limits from other missions, we assumed a power-law spectrum with
NH=3e20 cm^2, and photon index (Gamma)=1.7


RANK 3 sources
==============

These are uncatalogued X-ray sources, however they are not brighter
than previous upper limits, so do not stand out as likely counterparts
to the GW trigger.
  
  Source 75:
  =============
    RA: 	 331.8734 ( = 22h 07m 29.62s) J2000
    Dec:	 +49.5170 ( = +49d 31' 01.2") J2000
    Error:	 +6.2 (arcsec, radius, 90% confidence).
    Peak Rate:	 2.4e-02 +/- 8.1e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 1.0e-12 +/- 3.5e-13 erg cm^-2 s^-1 (0.3-10 keV)
    RASS UL:	 2.8e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)
       so the source is not above the RASS 3-sigma upper limit.
    There is no evidence for fading.
    There are 2 GWGC or 2MPZ galaxies within 200 kpc of the source.
      and consistent (within 3-sigma) with the distance to the GW
object.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 78:
  =============
    RA: 	 332.0579 ( = 22h 08m 13.90s) J2000
    Dec:	 +53.1143 ( = +53d 06' 51.5") J2000
    Error:	 +5.9 (arcsec, radius, 90% confidence).
    Peak Rate:	 1.6e-02 +/- 7.0e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 7.1e-13 +/- 3.0e-13 erg cm^-2 s^-1 (0.3-10 keV)
    RASS UL:	 1.2e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)
       so the source is not above the RASS 3-sigma upper limit.
    There is no evidence for fading.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
    There are 2 2MASS objects within the source's 3-sigma error radius.
  
  Source 88:
  =============
    RA: 	 319.2979 ( = 21h 17m 11.50s) J2000
    Dec:	 +36.0755 ( = +36d 04' 31.8") J2000
    Error:	 +5.6 (arcsec, radius, 90% confidence).
    Peak Rate:	 2.3e-02 +/- 9.0e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 9.9e-13 +/- 3.8e-13 erg cm^-2 s^-1 (0.3-10 keV)
    RASS UL:	 1.9e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)
       so the source is not above the RASS 3-sigma upper limit.
    The source may be fading, at the 0.7-sigma level.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `TYC 2714-1267-1' is 2.9" away.
    There are 2 2MASS objects within the source's 3-sigma error radius.
  
  Source 89:
  =============
    RA: 	 337.1248 ( = 22h 28m 29.95s) J2000
    Dec:	 +53.7363 ( = +53d 44' 10.7") J2000
    Error:	 +5.4 (arcsec, radius, 90% confidence).
    Peak Rate:	 3.4e-02 +/- 9.9e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 1.4e-12 +/- 4.3e-13 erg cm^-2 s^-1 (0.3-10 keV)
    RASS UL:	 1.7e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)
       so the source is not above the RASS 3-sigma upper limit.
    There is no evidence for fading.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 100:
  =============
    RA: 	 321.1287 ( = 21h 24m 30.89s) J2000
    Dec:	 +40.2662 ( = +40d 15' 58.3") J2000
    Error:	 +6.2 (arcsec, radius, 90% confidence).
    Peak Rate:	 1.2e-02 +/- 6.4e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 5.0e-13 +/- 2.7e-13 erg cm^-2 s^-1 (0.3-10 keV)
    RASS UL:	 1.1e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)
       so the source is not above the RASS 3-sigma upper limit.
    There is no evidence for fading.
    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.

      and consistent (within 3-sigma) with the distance to the GW
object.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 102:
  =============
    RA: 	 185.8256 ( = 12h 23m 18.14s) J2000
    Dec:	 -44.6254 ( = -44d 37' 31.4") J2000
    Error:	 +6.4 (arcsec, radius, 90% confidence).
    Peak Rate:	 3.1e-02 +/- 1.2e-02 ct/sec (0.3-10 keV)
    Peak Flux:	 1.3e-12 +/- 5.1e-13 erg cm^-2 s^-1 (0.3-10 keV)
    RASS UL:	 3.5e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)
       so the source is not above the RASS 3-sigma upper limit.
    There is no evidence for fading.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 104:
  =============
    RA: 	 314.1185 ( = 20h 56m 28.44s) J2000
    Dec:	 +30.7549 ( = +30d 45' 17.6") J2000
    Error:	 +6.1 (arcsec, radius, 90% confidence).
    Peak Rate:	 2.5e-02 +/- 1.2e-02 ct/sec (0.3-10 keV)
    Peak Flux:	 1.1e-12 +/- 5.1e-13 erg cm^-2 s^-1 (0.3-10 keV)
    RASS UL:	 1.8 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)
       so the source is not above the RASS 3-sigma upper limit.
    There is no evidence for fading.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
  
  Source 108:
  =============
    RA: 	 317.9252 ( = 21h 11m 42.05s) J2000
    Dec:	 +32.9903 ( = +32d 59' 25.1") J2000
    Error:	 +7.2 (arcsec, radius, 90% confidence).
    Peak Rate:	 1.9e-02 +/- 8.2e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 8.3e-13 +/- 3.5e-13 erg cm^-2 s^-1 (0.3-10 keV)
    RASS UL:	 1.6e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)
       so the source is not above the RASS 3-sigma upper limit.
    There is no evidence for fading.
    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.

      and consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `NVSS J211141+325922' is 3.3" away.
    There are 3 2MASS objects within the source's 3-sigma error radius.
  
  Source 109:
  =============
    RA: 	 317.9797 ( = 21h 11m 55.13s) J2000
    Dec:	 +32.7464 ( = +32d 44' 47.0") J2000
    Error:	 +6.4 (arcsec, radius, 90% confidence).
    Peak Rate:	 3.1e-02 +/- 1.1e-02 ct/sec (0.3-10 keV)
    Peak Flux:	 1.3e-12 +/- 4.9e-13 erg cm^-2 s^-1 (0.3-10 keV)
    RASS UL:	 2.5e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)
       so the source is not above the RASS 3-sigma upper limit.
    There is no evidence for fading.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 113:
  =============
    RA: 	 338.0488 ( = 22h 32m 11.71s) J2000
    Dec:	 +54.1364 ( = +54d 08' 11.0") J2000
    Error:	 +4.7 (arcsec, radius, 90% confidence).
    Peak Rate:	 1.8e-02 +/- 5.4e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 7.9e-13 +/- 2.3e-13 erg cm^-2 s^-1 (0.3-10 keV)
    RASS UL:	 1.8e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)
       so the source is not above the RASS 3-sigma upper limit.
    There is no evidence for fading.
    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.

      and consistent (within 3-sigma) with the distance to the GW
object.
    There are 2 2MASS objects within the source's 3-sigma error radius.
  
  Source 114:
  =============
    RA: 	 149.5567 ( = 09h 58m 13.61s) J2000
    Dec:	 -5.4085 ( = -05d 24' 30.6") J2000
    Error:	 +6.0 (arcsec, radius, 90% confidence).
    Peak Rate:	 1.9e-02 +/- 7.9e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 8.1e-13 +/- 3.4e-13 erg cm^-2 s^-1 (0.3-10 keV)
    RASS UL:	 4.3e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)
       so the source is not above the RASS 3-sigma upper limit.
    There is no evidence for fading.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `2dFGRS TGN093Z309' is 8.5" away.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 115:
  =============
    RA: 	 335.3673 ( = 22h 21m 28.15s) J2000
    Dec:	 +50.5456 ( = +50d 32' 44.2") J2000
    Error:	 +6.2 (arcsec, radius, 90% confidence).
    Peak Rate:	 1.5e-02 +/- 7.1e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 6.5e-13 +/- 3.0e-13 erg cm^-2 s^-1 (0.3-10 keV)
    RASS UL:	 9.9e-03 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)
       so the source is not above the RASS 3-sigma upper limit.
    There is no evidence for fading.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
    There is 1 2MASS object within the source's 3-sigma error radius.


RANK 4 sources
==============

These are catalogued X-ray sources, showing no signs of outburst
compared to previous observations, so they are not likely to be related
to the GW trigger.
  
  Source 74:
  =============
    RA: 	 331.9459 ( = 22h 07m 47.02s) J2000
    Dec:	 +49.5290 ( = +49d 31' 44.4") J2000
    Error:	 +5.3 (arcsec, radius, 90% confidence).
    Peak Rate:	 2.1e-02 +/- 7.7e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 9.1e-13 +/- 3.3e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  1RXS J220747.1+493153 in the ROSAT/RASSFSC catalogue
    Separation:  8.7" from the XRT source
    Cat Rate:	 4.6e-02 +/- 1.0e-02 ct/sec 
    Cat Flux:	 1.3e-12 +/- 2.9e-13 erg cm^-2 s^-1 (0.3-10 keV)
       so the source is not above the catalogued flux.
    There is no evidence for fading.
    There are 3 GWGC or 2MPZ galaxies within 200 kpc of the source.
      and consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `TYC 3614-2026-1' is 5.2" away.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 76:
  =============
    RA: 	 162.7383 ( = 10h 50m 57.19s) J2000
    Dec:	 -28.8335 ( = -28d 50' 00.6") J2000
    Error:	 +5.1 (arcsec, radius, 90% confidence).
    Peak Rate:	 1.8e-02 +/- 8.3e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 7.7e-13 +/- 3.6e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  1RXS J105057.2-284954 in the ROSAT/RASSBSC catalogue
    Separation:  6.5" from the XRT source
    Cat Rate:	 5.4e-02 +/- 1.4e-02 ct/sec 
    Cat Flux:	 1.5e-12 +/- 3.9e-13 erg cm^-2 s^-1 (0.3-10 keV)
       so the source is not above the catalogued flux.
    There is no evidence for fading.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `CD-28  8475' is 5" away.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 77:
  =============
    RA: 	 169.9411 ( = 11h 19m 45.86s) J2000
    Dec:	 -34.5976 ( = -34d 35' 51.4") J2000
    Error:	 +6.8 (arcsec, radius, 90% confidence).
    Peak Rate:	 1.9e-02 +/- 9.0e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 8.3e-13 +/- 3.9e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  XMMSL1 J111946.5-343602 in the XMM-NEWTON/XMMSLEWCLN
catalogue
    Separation:  12.8" from the XRT source
    Cat Rate:	 6.6e-01 +/- 2.1e-01 ct/sec 
    Cat Flux:	 6.6e-12 +/- 2.1e-12 erg cm^-2 s^-1 (0.3-10 keV)
       so the source is not above the catalogued flux.
    There is no evidence for fading.
    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.

      and consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `1RXS J111945.5-343544' is 8.3" away.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 82:
  =============
    RA: 	 325.2405 ( = 21h 40m 57.72s) J2000
    Dec:	 +38.2968 ( = +38d 17' 48.5") J2000
    Error:	 +7.2 (arcsec, radius, 90% confidence).
    Peak Rate:	 6.0e-02 +/- 1.5e-02 ct/sec (0.3-10 keV)
    Peak Flux:	 2.6e-12 +/- 6.5e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  1RXS J214053.8+381749 in the ROSAT/RASSFSC catalogue
    Separation:  46.0" from the XRT source
    Cat Rate:	 3.0e-02 +/- 9.2e-03 ct/sec 
    Cat Flux:	 8.5e-13 +/- 2.6e-13 erg cm^-2 s^-1 (0.3-10 keV)
       so the source  is 2.5-sigma above the catalogued flux.
    There is no evidence for fading.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 90:
  =============
    RA: 	 337.3447 ( = 22h 29m 22.73s) J2000
    Dec:	 +53.8290 ( = +53d 49' 44.4") J2000
    Error:	 +5.3 (arcsec, radius, 90% confidence).
    Peak Rate:	 3.2e-02 +/- 1.0e-02 ct/sec (0.3-10 keV)
    Peak Flux:	 1.4e-12 +/- 4.5e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  1RXS J222920.8+534939 in the ROSAT/RASSFSC catalogue
    Separation:  18.0" from the XRT source
    Cat Rate:	 3.5e-02 +/- 9.6e-03 ct/sec 
    Cat Flux:	 9.7e-13 +/- 2.7e-13 erg cm^-2 s^-1 (0.3-10 keV)
       so the source  is 0.8-sigma above the catalogued flux.
    There is no evidence for fading.
    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.

      and consistent (within 3-sigma) with the distance to the GW
object.
  
  Source 91:
  =============
    RA: 	 153.2726 ( = 10h 13m 5.42s) J2000
    Dec:	 -16.6892 ( = -16d 41' 21.1") J2000
    Error:	 +6.7 (arcsec, radius, 90% confidence).
    Peak Rate:	 1.6e-02 +/- 7.6e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 7.0e-13 +/- 3.3e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  1RXS J101305.6-164124 in the ROSAT/RASSBSC catalogue
    Separation:  3.9" from the XRT source
    Cat Rate:	 7.4e-02 +/- 1.5e-02 ct/sec 
    Cat Flux:	 2.1e-12 +/- 4.1e-13 erg cm^-2 s^-1 (0.3-10 keV)
       so the source is not above the catalogued flux.
    There is no evidence for fading.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `1RXS J101305.6-164124' is 3.8" away.
  
  Source 92:
  =============
    RA: 	 153.7642 ( = 10h 15m 3.41s) J2000
    Dec:	 -16.8695 ( = -16d 52' 10.2") J2000
    Error:	 +4.8 (arcsec, radius, 90% confidence).
    Peak Rate:	 3.4e-02 +/- 1.1e-02 ct/sec (0.3-10 keV)
    Peak Flux:	 1.4e-12 +/- 4.7e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  1RXS J101502.3-165219 in the ROSAT/RASSBSC catalogue
    Separation:  18.0" from the XRT source
    Cat Rate:	 6.8e-02 +/- 1.4e-02 ct/sec 
    Cat Flux:	 1.9e-12 +/- 4.1e-13 erg cm^-2 s^-1 (0.3-10 keV)
       so the source is not above the catalogued flux.
    There is no evidence for fading.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `[VV96] J101503.2-165215' is 4.8" away.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 93:
  =============
    RA: 	 320.2548 ( = 21h 21m 1.15s) J2000
    Dec:	 +40.3434 ( = +40d 20' 36.2") J2000
    Error:	 +4.5 (arcsec, radius, 90% confidence).
    Peak Rate:	 7.7e-02 +/- 3.5e-02 ct/sec (0.3-10 keV)
    Peak Flux:	 3.3e-12 +/- 1.5e-12 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  1SXPS J212101.4+402040 in the 1SXPS catalogue
    Separation:  5.2" from the XRT source
    Cat Rate:	 9.7e-02 +/- 6.6e-03 ct/sec 
    Cat Flux:	 4.2e-12 +/- 2.8e-13 erg cm^-2 s^-1 (0.3-10 keV)
       so the source is not above the catalogued flux.
    The source may be fading, at the 0.6-sigma level.
    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.

      and consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `HR  8170' is 6.8" away.
    There is 1 2MASS object within the source's 3-sigma error radius.
    NOTE: This source is affected by optical loading. The X-ray
detection appears real, but the flux may be inaccurate.
  
  Source 99:
  =============
    RA: 	 332.2250 ( = 22h 08m 54.00s) J2000
    Dec:	 +50.8409 ( = +50d 50' 27.2") J2000
    Error:	 +5.3 (arcsec, radius, 90% confidence).
    Peak Rate:	 2.2e-02 +/- 7.6e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 9.4e-13 +/- 3.3e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  1RXS J220855.0+505022 in the ROSAT/RASSFSC catalogue
    Separation:  10.8" from the XRT source
    Cat Rate:	 2.6e-02 +/- 8.6e-03 ct/sec 
    Cat Flux:	 7.3e-13 +/- 2.4e-13 erg cm^-2 s^-1 (0.3-10 keV)
       so the source  is 0.5-sigma above the catalogued flux.
    There is no evidence for fading.
    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.

      and consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `TYC 3618-4068-1' is 1.3" away.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 101:
  =============
    RA: 	 156.2197 ( = 10h 24m 52.73s) J2000
    Dec:	 -19.9373 ( = -19d 56' 14.3") J2000
    Error:	 +6.8 (arcsec, radius, 90% confidence).
    Peak Rate:	 1.8e-02 +/- 7.7e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 7.9e-13 +/- 3.3e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  1RXS J102453.0-195618 in the ROSAT/RASSFSC catalogue
    Separation:  5.4" from the XRT source
    Cat Rate:	 2.4e-02 +/- 9.8e-03 ct/sec 
    Cat Flux:	 6.8e-13 +/- 2.8e-13 erg cm^-2 s^-1 (0.3-10 keV)
       so the source  is 0.3-sigma above the catalogued flux.
    There is no evidence for fading.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `1RXS J102453.0-195618' is 5.4" away.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 103:
  =============
    RA: 	 182.5174 ( = 12h 10m 4.18s) J2000
    Dec:	 -46.6067 ( = -46d 36' 24.1") J2000
    Error:	 +4.3 (arcsec, radius, 90% confidence).
    Peak Rate:	 1.1e-01 +/- 2.0e-02 ct/sec (0.3-10 keV)
    Peak Flux:	 4.9e-12 +/- 8.4e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  1SXPS J121004.1-463628 in the 1SXPS catalogue
    Separation:  4.2" from the XRT source
    Cat Rate:	 9.1e-02 +/- 4.7e-03 ct/sec 
    Cat Flux:	 3.9e-12 +/- 2.0e-13 erg cm^-2 s^-1 (0.3-10 keV)
       so the source  is 1.1-sigma above the catalogued flux.
    There is no evidence for fading.
    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.

      and consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `6dFGS gJ121004.0-463627' is 3.7" away.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 106:
  =============
    RA: 	 338.9167 ( = 22h 35m 40.01s) J2000
    Dec:	 +53.7587 ( = +53d 45' 31.3") J2000
    Error:	 +6.2 (arcsec, radius, 90% confidence).
    Peak Rate:	 5.4e-02 +/- 4.1e-02 ct/sec (0.3-10 keV)
    Peak Flux:	 2.3e-12 +/- 1.8e-12 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  1RXS J223540.8+534546 in the ROSAT/RASSFSC catalogue
    Separation:  16.8" from the XRT source
    Cat Rate:	 2.8e-02 +/- 8.6e-03 ct/sec 
    Cat Flux:	 7.9e-13 +/- 2.4e-13 erg cm^-2 s^-1 (0.3-10 keV)
       so the source  is 0.9-sigma above the catalogued flux.
    The source may be fading, at the 1.2-sigma level.
    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.

      and consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `2MASS J22354027+5345341' is 3.7" away.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 110:
  =============
    RA: 	 182.8138 ( = 12h 11m 15.31s) J2000
    Dec:	 -46.6922 ( = -46d 41' 31.9") J2000
    Error:	 +7.0 (arcsec, radius, 90% confidence).
    Peak Rate:	 2.2e-02 +/- 9.2e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 9.2e-13 +/- 4.0e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  1SXPS J121115.7-464136 in the 1SXPS catalogue
    Separation:  6.3" from the XRT source
    Cat Rate:	 1.6e-03 +/- 7.3e-04 ct/sec 
    Cat Flux:	 6.8e-14 +/- 3.1e-14 erg cm^-2 s^-1 (0.3-10 keV)
       so the source  is 2.2-sigma above the catalogued flux.
    There is no evidence for fading.
    There are 5 GWGC or 2MPZ galaxies within 200 kpc of the source.
      and consistent (within 3-sigma) with the distance to the GW
object.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 111:
  =============
    RA: 	 149.6399 ( = 09h 58m 33.58s) J2000
    Dec:	 -5.3605 ( = -05d 21' 37.8") J2000
    Error:	 +4.7 (arcsec, radius, 90% confidence).
    Peak Rate:	 6.9e-02 +/- 4.2e-02 ct/sec (0.3-10 keV)
    Peak Flux:	 3.0e-12 +/- 1.8e-12 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  1RXS J095829.9-052126 in the ROSAT/RASSFSC catalogue
    Separation:  56.3" from the XRT source
    Cat Rate:	 4.0e-02 +/- 1.8e-02 ct/sec 
    Cat Flux:	 1.1e-12 +/- 5.0e-13 erg cm^-2 s^-1 (0.3-10 keV)
       so the source  is 1.0-sigma above the catalogued flux.
    There is no evidence for fading.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 112:
  =============
    RA: 	 338.1576 ( = 22h 32m 37.82s) J2000
    Dec:	 +54.0915 ( = +54d 05' 29.4") J2000
    Error:	 +5.6 (arcsec, radius, 90% confidence).
    Peak Rate:	 2.2e-02 +/- 7.9e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 9.4e-13 +/- 3.4e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  XMMSL1 J223237.3+540522 in the XMM-NEWTON/XMMSLEWCLN
catalogue
    Separation:  8.4" from the XRT source
    Cat Rate:	 7.1e-01 +/- 3.1e-01 ct/sec 
    Cat Flux:	 7.1e-12 +/- 3.1e-12 erg cm^-2 s^-1 (0.3-10 keV)
       so the source is not above the catalogued flux.
    There is no evidence for fading.
    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.

      and consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `TYC 3983-1532-1' is 2.1" away.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 116:
  =============
    RA: 	 314.5512 ( = 20h 58m 12.29s) J2000
    Dec:	 +30.0769 ( = +30d 04' 36.8") J2000
    Error:	 +4.3 (arcsec, radius, 90% confidence).
    Peak Rate:	 1.0e-01 +/- 1.7e-02 ct/sec (0.3-10 keV)
    Peak Flux:	 4.3e-12 +/- 7.3e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  XMMSL1 J205812.3+300431 in the XMM-NEWTON/XMMSLEWCLN
catalogue
    Separation:  6.5" from the XRT source
    Cat Rate:	 1.5e+00 +/- 5.0e-01 ct/sec 
    Cat Flux:	 1.5e-11 +/- 5.0e-12 erg cm^-2 s^-1 (0.3-10 keV)
       so the source is not above the catalogued flux.
    There is no evidence for fading.
    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.

      and consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `2MASS J20581235+3004372' is 0.7" away.
    There are 2 2MASS objects within the source's 3-sigma error radius.
  
  Source 117:
  =============
    RA: 	 328.3164 ( = 21h 53m 15.94s) J2000
    Dec:	 +47.7302 ( = +47d 43' 48.7") J2000
    Error:	 +5.2 (arcsec, radius, 90% confidence).
    Peak Rate:	 2.3e-02 +/- 9.5e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 9.7e-13 +/- 4.1e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  2RXP J215317.0+474351 in the ROSAT/ROSPSPC catalogue
    Separation:  10.6" from the XRT source
    Cat Rate:	 1.9e-02 +/- 0.0e+00 ct/sec 
    Cat Flux:	 5.4e-13 +/- 0.0e+00 erg cm^-2 s^-1 (0.3-10 keV)
       so the source  is 1.1-sigma above the catalogued flux.
    There is no evidence for fading.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `BD+47  3593' is 2.9" away.
    There is 1 2MASS object within the source's 3-sigma error radius.
  
  Source 118:
  =============
    RA: 	 169.5633 ( = 11h 18m 15.19s) J2000
    Dec:	 -32.8034 ( = -32d 48' 12.2") J2000
    Error:	 +6.5 (arcsec, radius, 90% confidence).
    Peak Rate:	 2.0e-02 +/- 7.9e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 8.7e-13 +/- 3.4e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  1SXPS J111815.4-324819 in the 1SXPS catalogue
    Separation:  8.3" from the XRT source
    Cat Rate:	 2.6e-03 +/- 1.6e-03 ct/sec 
    Cat Flux:	 1.1e-13 +/- 6.9e-14 erg cm^-2 s^-1 (0.3-10 keV)
       so the source  is 2.2-sigma above the catalogued flux.
    There is no evidence for fading.
    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy
      which is consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `[BKM2001]	8' is 8.8" away.
  
  Source 119:
  =============
    RA: 	 321.8103 ( = 21h 27m 14.47s) J2000
    Dec:	 +39.2096 ( = +39d 12' 34.6") J2000
    Error:	 +6.0 (arcsec, radius, 90% confidence).
    Peak Rate:	 1.6e-02 +/- 6.8e-03 ct/sec (0.3-10 keV)
    Peak Flux:	 6.8e-13 +/- 2.9e-13 erg cm^-2 s^-1 (0.3-10 keV)
    Cat Source:  1RXS J212713.9+391247 in the ROSAT/RASSFSC catalogue
    Separation:  14.1" from the XRT source
    Cat Rate:	 2.2e-02 +/- 8.2e-03 ct/sec 
    Cat Flux:	 6.1e-13 +/- 2.3e-13 erg cm^-2 s^-1 (0.3-10 keV)
       so the source  is 0.2-sigma above the catalogued flux.
    There is no evidence for fading.
    There are 2 GWGC or 2MPZ galaxies within 200 kpc of the source.
      and consistent (within 3-sigma) with the distance to the GW
object.
    A SIMBAD object `TYC 3182-1546-1' is 6.8" away.
    There is 1 2MASS object within the source's 3-sigma error radius.

This circular is an official product of the Swift team.