{
  "bibcode": "2017GCN.20821....1E",
  "body": "P.A. Evans (U. Leicester), J.A. Kennea (PSU), S.D. Barthelmy\n(NASA/GSFC), A.P. Beardmore (U. Leicester), A.A. Breeveld (UCL-MSSL),\nD.N. Burrows (PSU), S. Campana (INAF-OAB), S.B. Cenko (NASA/GSFC), G.\nCusumano (INAF-IASF PA), A. D'Ai (INAF-IASFPA), P. D'Avanzo (INAF-OAB),\nV.D'Elia(ASDC), P. Giommi (ASI), C. Gronwall (PSU), H.A. Krimm\n(CRESST/GSFC/USRA), N.P.M. Kuin (UCL-MSSL), A.Y. Lien (GSFC/UMBC), D.\nMalesani (DARK/NBI), F.E. Marshall (NASA/GSFC), A. Melandri (INAF-OAB),\nB. Mingo (U. Leicester),  J.A. Nousek (PSU), S.R. Oates (U. Warwick),\nP.T. O'Brien (U. Leicester), J.P. Osborne (U. Leicester), C. Pagani (U.\nLeicester), K.L. Page (U.Leicester), D.M. Palmer (LANL), M. Perri\n(ASDC), J.L. Racusin (NASA/GSFC), B. Sbarufatti (INAF-OAB/PSU), M.H.\nSiegel (PSU), G. Tagliaferri (INAF-OAB), E. Troja (NASA/GSFC/UMCP)\nreport on behalf of the Swift team:\n\nSwift has performed a series of 1751 observations, covering 1408\nseparate locations within the LVC error region for the GW trigger\nG275697 convolved with the 2MPZ catalogue, using the 'bayestar' GW\nlocalisation map. As this is a 3D skymap, galaxy distances were taken\ninto account in selecting which ones to observe. The observations\ncurrently span from 15 ks to 534 ks after the LVC trigger, and cover\n171 sq degrees on the sky (corrected for overlaps). This covers 0.16 of\nthe probability in the LVC skymap, and 0.31 of the probability in the\nLVC map after convolving with the 2MPZ galaxy catalogue, as described\nby Evans et al., (2016, MNRAS,\t462, 1591).\n\nSince the last Swift GCN, we have detected 31 X-ray sources, these are\neither new detections, or have been given a higher 'rank' than in the\nlast circular. Each source is assigned a rank of 1-4 which describes\nhow likely it is to be related to the GW trigger, with 1 being the most\nlikely and 4 being the least likely. The ranks are described at\nhttp://www.swift.ac.uk/ranks.php.\n\nWe have found:\n\n  * 0 sources of rank 1\n  * 0 sources of rank 2\n  * 12 sources of rank 3\n  * 19 sources of rank 4\n\nFor all flux conversions and comparisons with catalogues and upper\nlimits from other missions, we assumed a power-law spectrum with\nNH=3e20 cm^2, and photon index (Gamma)=1.7\n\n\nRANK 3 sources\n==============\n\nThese are uncatalogued X-ray sources, however they are not brighter\nthan previous upper limits, so do not stand out as likely counterparts\nto the GW trigger.\n  \n  Source 75:\n  =============\n    RA: \t 331.8734 ( = 22h 07m 29.62s) J2000\n    Dec:\t +49.5170 ( = +49d 31' 01.2\") J2000\n    Error:\t +6.2 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 2.4e-02 +/- 8.1e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 1.0e-12 +/- 3.5e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    RASS UL:\t 2.8e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)\n       so the source is not above the RASS 3-sigma upper limit.\n    There is no evidence for fading.\n    There are 2 GWGC or 2MPZ galaxies within 200 kpc of the source.\n      and consistent (within 3-sigma) with the distance to the GW\nobject.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 78:\n  =============\n    RA: \t 332.0579 ( = 22h 08m 13.90s) J2000\n    Dec:\t +53.1143 ( = +53d 06' 51.5\") J2000\n    Error:\t +5.9 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 1.6e-02 +/- 7.0e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 7.1e-13 +/- 3.0e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    RASS UL:\t 1.2e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)\n       so the source is not above the RASS 3-sigma upper limit.\n    There is no evidence for fading.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n    There are 2 2MASS objects within the source's 3-sigma error radius.\n  \n  Source 88:\n  =============\n    RA: \t 319.2979 ( = 21h 17m 11.50s) J2000\n    Dec:\t +36.0755 ( = +36d 04' 31.8\") J2000\n    Error:\t +5.6 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 2.3e-02 +/- 9.0e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 9.9e-13 +/- 3.8e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    RASS UL:\t 1.9e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)\n       so the source is not above the RASS 3-sigma upper limit.\n    The source may be fading, at the 0.7-sigma level.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `TYC 2714-1267-1' is 2.9\" away.\n    There are 2 2MASS objects within the source's 3-sigma error radius.\n  \n  Source 89:\n  =============\n    RA: \t 337.1248 ( = 22h 28m 29.95s) J2000\n    Dec:\t +53.7363 ( = +53d 44' 10.7\") J2000\n    Error:\t +5.4 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 3.4e-02 +/- 9.9e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 1.4e-12 +/- 4.3e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    RASS UL:\t 1.7e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)\n       so the source is not above the RASS 3-sigma upper limit.\n    There is no evidence for fading.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 100:\n  =============\n    RA: \t 321.1287 ( = 21h 24m 30.89s) J2000\n    Dec:\t +40.2662 ( = +40d 15' 58.3\") J2000\n    Error:\t +6.2 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 1.2e-02 +/- 6.4e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 5.0e-13 +/- 2.7e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    RASS UL:\t 1.1e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)\n       so the source is not above the RASS 3-sigma upper limit.\n    There is no evidence for fading.\n    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.\n\n      and consistent (within 3-sigma) with the distance to the GW\nobject.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 102:\n  =============\n    RA: \t 185.8256 ( = 12h 23m 18.14s) J2000\n    Dec:\t -44.6254 ( = -44d 37' 31.4\") J2000\n    Error:\t +6.4 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 3.1e-02 +/- 1.2e-02 ct/sec (0.3-10 keV)\n    Peak Flux:\t 1.3e-12 +/- 5.1e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    RASS UL:\t 3.5e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)\n       so the source is not above the RASS 3-sigma upper limit.\n    There is no evidence for fading.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 104:\n  =============\n    RA: \t 314.1185 ( = 20h 56m 28.44s) J2000\n    Dec:\t +30.7549 ( = +30d 45' 17.6\") J2000\n    Error:\t +6.1 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 2.5e-02 +/- 1.2e-02 ct/sec (0.3-10 keV)\n    Peak Flux:\t 1.1e-12 +/- 5.1e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    RASS UL:\t 1.8 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)\n       so the source is not above the RASS 3-sigma upper limit.\n    There is no evidence for fading.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n  \n  Source 108:\n  =============\n    RA: \t 317.9252 ( = 21h 11m 42.05s) J2000\n    Dec:\t +32.9903 ( = +32d 59' 25.1\") J2000\n    Error:\t +7.2 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 1.9e-02 +/- 8.2e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 8.3e-13 +/- 3.5e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    RASS UL:\t 1.6e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)\n       so the source is not above the RASS 3-sigma upper limit.\n    There is no evidence for fading.\n    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.\n\n      and consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `NVSS J211141+325922' is 3.3\" away.\n    There are 3 2MASS objects within the source's 3-sigma error radius.\n  \n  Source 109:\n  =============\n    RA: \t 317.9797 ( = 21h 11m 55.13s) J2000\n    Dec:\t +32.7464 ( = +32d 44' 47.0\") J2000\n    Error:\t +6.4 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 3.1e-02 +/- 1.1e-02 ct/sec (0.3-10 keV)\n    Peak Flux:\t 1.3e-12 +/- 4.9e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    RASS UL:\t 2.5e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)\n       so the source is not above the RASS 3-sigma upper limit.\n    There is no evidence for fading.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 113:\n  =============\n    RA: \t 338.0488 ( = 22h 32m 11.71s) J2000\n    Dec:\t +54.1364 ( = +54d 08' 11.0\") J2000\n    Error:\t +4.7 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 1.8e-02 +/- 5.4e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 7.9e-13 +/- 2.3e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    RASS UL:\t 1.8e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)\n       so the source is not above the RASS 3-sigma upper limit.\n    There is no evidence for fading.\n    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.\n\n      and consistent (within 3-sigma) with the distance to the GW\nobject.\n    There are 2 2MASS objects within the source's 3-sigma error radius.\n  \n  Source 114:\n  =============\n    RA: \t 149.5567 ( = 09h 58m 13.61s) J2000\n    Dec:\t -5.4085 ( = -05d 24' 30.6\") J2000\n    Error:\t +6.0 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 1.9e-02 +/- 7.9e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 8.1e-13 +/- 3.4e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    RASS UL:\t 4.3e-02 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)\n       so the source is not above the RASS 3-sigma upper limit.\n    There is no evidence for fading.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `2dFGRS TGN093Z309' is 8.5\" away.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 115:\n  =============\n    RA: \t 335.3673 ( = 22h 21m 28.15s) J2000\n    Dec:\t +50.5456 ( = +50d 32' 44.2\") J2000\n    Error:\t +6.2 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 1.5e-02 +/- 7.1e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 6.5e-13 +/- 3.0e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    RASS UL:\t 9.9e-03 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)\n       so the source is not above the RASS 3-sigma upper limit.\n    There is no evidence for fading.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n\n\nRANK 4 sources\n==============\n\nThese are catalogued X-ray sources, showing no signs of outburst\ncompared to previous observations, so they are not likely to be related\nto the GW trigger.\n  \n  Source 74:\n  =============\n    RA: \t 331.9459 ( = 22h 07m 47.02s) J2000\n    Dec:\t +49.5290 ( = +49d 31' 44.4\") J2000\n    Error:\t +5.3 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 2.1e-02 +/- 7.7e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 9.1e-13 +/- 3.3e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  1RXS J220747.1+493153 in the ROSAT/RASSFSC catalogue\n    Separation:  8.7\" from the XRT source\n    Cat Rate:\t 4.6e-02 +/- 1.0e-02 ct/sec \n    Cat Flux:\t 1.3e-12 +/- 2.9e-13 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source is not above the catalogued flux.\n    There is no evidence for fading.\n    There are 3 GWGC or 2MPZ galaxies within 200 kpc of the source.\n      and consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `TYC 3614-2026-1' is 5.2\" away.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 76:\n  =============\n    RA: \t 162.7383 ( = 10h 50m 57.19s) J2000\n    Dec:\t -28.8335 ( = -28d 50' 00.6\") J2000\n    Error:\t +5.1 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 1.8e-02 +/- 8.3e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 7.7e-13 +/- 3.6e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  1RXS J105057.2-284954 in the ROSAT/RASSBSC catalogue\n    Separation:  6.5\" from the XRT source\n    Cat Rate:\t 5.4e-02 +/- 1.4e-02 ct/sec \n    Cat Flux:\t 1.5e-12 +/- 3.9e-13 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source is not above the catalogued flux.\n    There is no evidence for fading.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `CD-28  8475' is 5\" away.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 77:\n  =============\n    RA: \t 169.9411 ( = 11h 19m 45.86s) J2000\n    Dec:\t -34.5976 ( = -34d 35' 51.4\") J2000\n    Error:\t +6.8 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 1.9e-02 +/- 9.0e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 8.3e-13 +/- 3.9e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  XMMSL1 J111946.5-343602 in the XMM-NEWTON/XMMSLEWCLN\ncatalogue\n    Separation:  12.8\" from the XRT source\n    Cat Rate:\t 6.6e-01 +/- 2.1e-01 ct/sec \n    Cat Flux:\t 6.6e-12 +/- 2.1e-12 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source is not above the catalogued flux.\n    There is no evidence for fading.\n    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.\n\n      and consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `1RXS J111945.5-343544' is 8.3\" away.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 82:\n  =============\n    RA: \t 325.2405 ( = 21h 40m 57.72s) J2000\n    Dec:\t +38.2968 ( = +38d 17' 48.5\") J2000\n    Error:\t +7.2 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 6.0e-02 +/- 1.5e-02 ct/sec (0.3-10 keV)\n    Peak Flux:\t 2.6e-12 +/- 6.5e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  1RXS J214053.8+381749 in the ROSAT/RASSFSC catalogue\n    Separation:  46.0\" from the XRT source\n    Cat Rate:\t 3.0e-02 +/- 9.2e-03 ct/sec \n    Cat Flux:\t 8.5e-13 +/- 2.6e-13 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source  is 2.5-sigma above the catalogued flux.\n    There is no evidence for fading.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 90:\n  =============\n    RA: \t 337.3447 ( = 22h 29m 22.73s) J2000\n    Dec:\t +53.8290 ( = +53d 49' 44.4\") J2000\n    Error:\t +5.3 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 3.2e-02 +/- 1.0e-02 ct/sec (0.3-10 keV)\n    Peak Flux:\t 1.4e-12 +/- 4.5e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  1RXS J222920.8+534939 in the ROSAT/RASSFSC catalogue\n    Separation:  18.0\" from the XRT source\n    Cat Rate:\t 3.5e-02 +/- 9.6e-03 ct/sec \n    Cat Flux:\t 9.7e-13 +/- 2.7e-13 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source  is 0.8-sigma above the catalogued flux.\n    There is no evidence for fading.\n    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.\n\n      and consistent (within 3-sigma) with the distance to the GW\nobject.\n  \n  Source 91:\n  =============\n    RA: \t 153.2726 ( = 10h 13m 5.42s) J2000\n    Dec:\t -16.6892 ( = -16d 41' 21.1\") J2000\n    Error:\t +6.7 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 1.6e-02 +/- 7.6e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 7.0e-13 +/- 3.3e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  1RXS J101305.6-164124 in the ROSAT/RASSBSC catalogue\n    Separation:  3.9\" from the XRT source\n    Cat Rate:\t 7.4e-02 +/- 1.5e-02 ct/sec \n    Cat Flux:\t 2.1e-12 +/- 4.1e-13 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source is not above the catalogued flux.\n    There is no evidence for fading.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `1RXS J101305.6-164124' is 3.8\" away.\n  \n  Source 92:\n  =============\n    RA: \t 153.7642 ( = 10h 15m 3.41s) J2000\n    Dec:\t -16.8695 ( = -16d 52' 10.2\") J2000\n    Error:\t +4.8 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 3.4e-02 +/- 1.1e-02 ct/sec (0.3-10 keV)\n    Peak Flux:\t 1.4e-12 +/- 4.7e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  1RXS J101502.3-165219 in the ROSAT/RASSBSC catalogue\n    Separation:  18.0\" from the XRT source\n    Cat Rate:\t 6.8e-02 +/- 1.4e-02 ct/sec \n    Cat Flux:\t 1.9e-12 +/- 4.1e-13 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source is not above the catalogued flux.\n    There is no evidence for fading.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `[VV96] J101503.2-165215' is 4.8\" away.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 93:\n  =============\n    RA: \t 320.2548 ( = 21h 21m 1.15s) J2000\n    Dec:\t +40.3434 ( = +40d 20' 36.2\") J2000\n    Error:\t +4.5 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 7.7e-02 +/- 3.5e-02 ct/sec (0.3-10 keV)\n    Peak Flux:\t 3.3e-12 +/- 1.5e-12 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  1SXPS J212101.4+402040 in the 1SXPS catalogue\n    Separation:  5.2\" from the XRT source\n    Cat Rate:\t 9.7e-02 +/- 6.6e-03 ct/sec \n    Cat Flux:\t 4.2e-12 +/- 2.8e-13 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source is not above the catalogued flux.\n    The source may be fading, at the 0.6-sigma level.\n    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.\n\n      and consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `HR  8170' is 6.8\" away.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n    NOTE: This source is affected by optical loading. The X-ray\ndetection appears real, but the flux may be inaccurate.\n  \n  Source 99:\n  =============\n    RA: \t 332.2250 ( = 22h 08m 54.00s) J2000\n    Dec:\t +50.8409 ( = +50d 50' 27.2\") J2000\n    Error:\t +5.3 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 2.2e-02 +/- 7.6e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 9.4e-13 +/- 3.3e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  1RXS J220855.0+505022 in the ROSAT/RASSFSC catalogue\n    Separation:  10.8\" from the XRT source\n    Cat Rate:\t 2.6e-02 +/- 8.6e-03 ct/sec \n    Cat Flux:\t 7.3e-13 +/- 2.4e-13 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source  is 0.5-sigma above the catalogued flux.\n    There is no evidence for fading.\n    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.\n\n      and consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `TYC 3618-4068-1' is 1.3\" away.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 101:\n  =============\n    RA: \t 156.2197 ( = 10h 24m 52.73s) J2000\n    Dec:\t -19.9373 ( = -19d 56' 14.3\") J2000\n    Error:\t +6.8 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 1.8e-02 +/- 7.7e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 7.9e-13 +/- 3.3e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  1RXS J102453.0-195618 in the ROSAT/RASSFSC catalogue\n    Separation:  5.4\" from the XRT source\n    Cat Rate:\t 2.4e-02 +/- 9.8e-03 ct/sec \n    Cat Flux:\t 6.8e-13 +/- 2.8e-13 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source  is 0.3-sigma above the catalogued flux.\n    There is no evidence for fading.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `1RXS J102453.0-195618' is 5.4\" away.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 103:\n  =============\n    RA: \t 182.5174 ( = 12h 10m 4.18s) J2000\n    Dec:\t -46.6067 ( = -46d 36' 24.1\") J2000\n    Error:\t +4.3 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 1.1e-01 +/- 2.0e-02 ct/sec (0.3-10 keV)\n    Peak Flux:\t 4.9e-12 +/- 8.4e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  1SXPS J121004.1-463628 in the 1SXPS catalogue\n    Separation:  4.2\" from the XRT source\n    Cat Rate:\t 9.1e-02 +/- 4.7e-03 ct/sec \n    Cat Flux:\t 3.9e-12 +/- 2.0e-13 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source  is 1.1-sigma above the catalogued flux.\n    There is no evidence for fading.\n    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.\n\n      and consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `6dFGS gJ121004.0-463627' is 3.7\" away.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 106:\n  =============\n    RA: \t 338.9167 ( = 22h 35m 40.01s) J2000\n    Dec:\t +53.7587 ( = +53d 45' 31.3\") J2000\n    Error:\t +6.2 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 5.4e-02 +/- 4.1e-02 ct/sec (0.3-10 keV)\n    Peak Flux:\t 2.3e-12 +/- 1.8e-12 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  1RXS J223540.8+534546 in the ROSAT/RASSFSC catalogue\n    Separation:  16.8\" from the XRT source\n    Cat Rate:\t 2.8e-02 +/- 8.6e-03 ct/sec \n    Cat Flux:\t 7.9e-13 +/- 2.4e-13 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source  is 0.9-sigma above the catalogued flux.\n    The source may be fading, at the 1.2-sigma level.\n    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.\n\n      and consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `2MASS J22354027+5345341' is 3.7\" away.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 110:\n  =============\n    RA: \t 182.8138 ( = 12h 11m 15.31s) J2000\n    Dec:\t -46.6922 ( = -46d 41' 31.9\") J2000\n    Error:\t +7.0 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 2.2e-02 +/- 9.2e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 9.2e-13 +/- 4.0e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  1SXPS J121115.7-464136 in the 1SXPS catalogue\n    Separation:  6.3\" from the XRT source\n    Cat Rate:\t 1.6e-03 +/- 7.3e-04 ct/sec \n    Cat Flux:\t 6.8e-14 +/- 3.1e-14 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source  is 2.2-sigma above the catalogued flux.\n    There is no evidence for fading.\n    There are 5 GWGC or 2MPZ galaxies within 200 kpc of the source.\n      and consistent (within 3-sigma) with the distance to the GW\nobject.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 111:\n  =============\n    RA: \t 149.6399 ( = 09h 58m 33.58s) J2000\n    Dec:\t -5.3605 ( = -05d 21' 37.8\") J2000\n    Error:\t +4.7 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 6.9e-02 +/- 4.2e-02 ct/sec (0.3-10 keV)\n    Peak Flux:\t 3.0e-12 +/- 1.8e-12 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  1RXS J095829.9-052126 in the ROSAT/RASSFSC catalogue\n    Separation:  56.3\" from the XRT source\n    Cat Rate:\t 4.0e-02 +/- 1.8e-02 ct/sec \n    Cat Flux:\t 1.1e-12 +/- 5.0e-13 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source  is 1.0-sigma above the catalogued flux.\n    There is no evidence for fading.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 112:\n  =============\n    RA: \t 338.1576 ( = 22h 32m 37.82s) J2000\n    Dec:\t +54.0915 ( = +54d 05' 29.4\") J2000\n    Error:\t +5.6 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 2.2e-02 +/- 7.9e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 9.4e-13 +/- 3.4e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  XMMSL1 J223237.3+540522 in the XMM-NEWTON/XMMSLEWCLN\ncatalogue\n    Separation:  8.4\" from the XRT source\n    Cat Rate:\t 7.1e-01 +/- 3.1e-01 ct/sec \n    Cat Flux:\t 7.1e-12 +/- 3.1e-12 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source is not above the catalogued flux.\n    There is no evidence for fading.\n    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.\n\n      and consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `TYC 3983-1532-1' is 2.1\" away.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 116:\n  =============\n    RA: \t 314.5512 ( = 20h 58m 12.29s) J2000\n    Dec:\t +30.0769 ( = +30d 04' 36.8\") J2000\n    Error:\t +4.3 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 1.0e-01 +/- 1.7e-02 ct/sec (0.3-10 keV)\n    Peak Flux:\t 4.3e-12 +/- 7.3e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  XMMSL1 J205812.3+300431 in the XMM-NEWTON/XMMSLEWCLN\ncatalogue\n    Separation:  6.5\" from the XRT source\n    Cat Rate:\t 1.5e+00 +/- 5.0e-01 ct/sec \n    Cat Flux:\t 1.5e-11 +/- 5.0e-12 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source is not above the catalogued flux.\n    There is no evidence for fading.\n    There is 1 GWGC or 2MPZ galaxy within 200 kpc of the source.\n\n      and consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `2MASS J20581235+3004372' is 0.7\" away.\n    There are 2 2MASS objects within the source's 3-sigma error radius.\n  \n  Source 117:\n  =============\n    RA: \t 328.3164 ( = 21h 53m 15.94s) J2000\n    Dec:\t +47.7302 ( = +47d 43' 48.7\") J2000\n    Error:\t +5.2 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 2.3e-02 +/- 9.5e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 9.7e-13 +/- 4.1e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  2RXP J215317.0+474351 in the ROSAT/ROSPSPC catalogue\n    Separation:  10.6\" from the XRT source\n    Cat Rate:\t 1.9e-02 +/- 0.0e+00 ct/sec \n    Cat Flux:\t 5.4e-13 +/- 0.0e+00 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source  is 1.1-sigma above the catalogued flux.\n    There is no evidence for fading.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `BD+47  3593' is 2.9\" away.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n  \n  Source 118:\n  =============\n    RA: \t 169.5633 ( = 11h 18m 15.19s) J2000\n    Dec:\t -32.8034 ( = -32d 48' 12.2\") J2000\n    Error:\t +6.5 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 2.0e-02 +/- 7.9e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 8.7e-13 +/- 3.4e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  1SXPS J111815.4-324819 in the 1SXPS catalogue\n    Separation:  8.3\" from the XRT source\n    Cat Rate:\t 2.6e-03 +/- 1.6e-03 ct/sec \n    Cat Flux:\t 1.1e-13 +/- 6.9e-14 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source  is 2.2-sigma above the catalogued flux.\n    There is no evidence for fading.\n    NOTE: this source is NOT within 200 kpc of a GWGC or 2MPZ galaxy\n      which is consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `[BKM2001]\t8' is 8.8\" away.\n  \n  Source 119:\n  =============\n    RA: \t 321.8103 ( = 21h 27m 14.47s) J2000\n    Dec:\t +39.2096 ( = +39d 12' 34.6\") J2000\n    Error:\t +6.0 (arcsec, radius, 90% confidence).\n    Peak Rate:\t 1.6e-02 +/- 6.8e-03 ct/sec (0.3-10 keV)\n    Peak Flux:\t 6.8e-13 +/- 2.9e-13 erg cm^-2 s^-1 (0.3-10 keV)\n    Cat Source:  1RXS J212713.9+391247 in the ROSAT/RASSFSC catalogue\n    Separation:  14.1\" from the XRT source\n    Cat Rate:\t 2.2e-02 +/- 8.2e-03 ct/sec \n    Cat Flux:\t 6.1e-13 +/- 2.3e-13 erg cm^-2 s^-1 (0.3-10 keV)\n       so the source  is 0.2-sigma above the catalogued flux.\n    There is no evidence for fading.\n    There are 2 GWGC or 2MPZ galaxies within 200 kpc of the source.\n      and consistent (within 3-sigma) with the distance to the GW\nobject.\n    A SIMBAD object `TYC 3182-1546-1' is 6.8\" away.\n    There is 1 2MASS object within the source's 3-sigma error radius.\n\nThis circular is an official product of the Swift team.",
  "circularId": 20821,
  "createdOn": 1488806370000,
  "email": "klp5@le.ac.uk",
  "subject": "LIGO/Virgo G275697: Further Swift-XRT sources",
  "submitter": "Kim Page at U of Leceister  <klp5@le.ac.uk>",
  "eventId": "LIGO/Virgo G275697"
}