The Neil Gehrels Swift Observatory

Swift/BAT Hard X-ray Transient Monitor

Please Read Before Using These Results:README

Main page

Data current through 9:14 UT, April 15 (DOY 105), 2019

Sources are considered detected and added to this page under the following circumstances

  • The rate for the current day is at least 40 mCrab (1 mCrab = 0.000218 ct/cm2/sec) AND the significance is at least 2-sigma
  • -OR- The rate for the previous day is at least 40 mCrab AND the significance is at least 2-sigma
  • -OR- The average rate for the last ten days is at least 12 mCrab AND the significance is at least 2-sigma.

    • Swift/BAT Transient Sources (Currently Detected)

    Source Name RA J2000 Degs Dec J2000 Degs Alternate Name Source Type Today# Yesterday# Tenday# Mean* Peak* Days* Last Day*
    1 Sco X-1   244.979 -15.6400V818 Sco LMXB/NS 1375 (27.1) 1016 (27.8)- 1143 3380 462053544 ( 5044)
    2 Crab   83.6330 22.0150M1 PSR/PWN 939 (26.4) 932 (27.0) 0 ( 2.9) 1000 1762 429656657 ( 1931)
    3 Vela X-1   135.529 -40.5550GP Vel HMXB/NS 527 (25.4) 639 (24.4) 0 ( 2.8) 119 2614 401856544 ( 2044)
    4 Cyg X-1   299.591 35.2020V1357 Cyg HMXB/BH 478 (23.2) 581 (27.0)- 220 1734 486054140 ( 4448)
    5 4U 1700-377   255.987 -37.8440V884 Sco HMXB/NS 315 (22.2) 30 ( 5.0)- 112 1580 396954071 ( 4517)
    6 Her X-1   254.457 35.3420HZ Her LMXB/NS 303 (13.5) 155 (16.9)- 34 382 205354309 ( 4279)
    7 GRS 1915+105   288.798 10.9460V1487 Aql LMXB/BH 174 ( 4.3) 128 (11.1) 0 ( 3.3) 153 692 447854217 ( 4371)
    8 GX 301-2   186.657 -62.7700BP Cru HMXB/NS 173 ( 6.0) 320 (22.8)- 98 1612 436154568 ( 4020)
    9 XTE J1908+094   287.221 9.38500[KRL2007b] 353 HMXB/BHC 140 ( 3.1)-- 0 119 1256595 ( 1993)
    10 GRO J2058+42   314.750 41.7200NULL HMXB 139 (12.4) 159 (20.2) 2 ( 5.9) 0 229 1958570 ( 18)
    11 GX 5-1   270.284 -25.07804U 1758-25 LMXB/NS 134 (12.3) 138 (16.3)- 75 195 369655199 ( 3389)
    12 4U 1636-536   250.231 -53.7510V801 Ara LMXB/NS 133 ( 2.4) 93 (11.5)- 29 117 177856156 ( 2432)
    13 GX 339-4   255.706 -48.7900V821 Ara LMXB/BH 119 ( 2.0) 15 ( 2.1)- 12 708 84354131 ( 4457)
    14 MAXI J1932+091   293.293 9.19473NULL NULL 99 ( 2.9)- 2 ( 2.2) 0---
    15 4U 1901+03   285.914 3.21500HMXB 98 ( 7.9) 118 (10.8) 117 (37.2) 0 213 5358537 ( 51)
    16 AO 0235+16   39.6622 16.6165QSO B0235+16 BL Lac 94 ( 2.6)-- 0 0 1 1 ( 0)
    17 RX J1940.2-1025   295.048 -10.4240V1432 Aql CV/AM Her 88 ( 2.3)-- 3 0 4 1 ( 0)
    18 Cen X-3   170.313 -60.6230V779 Cen HMXB/NS 85 ( 5.3) 32 ( 3.9)- 56 357 328458444 ( 144)
    19 MAXI J1348-630   207.054 -63.2740NULL NULL 77 (11.4) 69 (12.0)- 236 4360 6458516 ( 72)
    20 1E 1740.7-2942   265.978 -29.7450GREAT ANNIHILATOR LMXB/BHC 73 ( 6.9) 61 ( 8.1)- 32 120 212958436 ( 152)
    21 SMC X-1   19.2710 -73.44304U 0115-73 HMXB/NS 72 ( 5.9) 24 ( 3.9)- 25 91 205756027 ( 2561)
    22 IGR J19294+1816   292.483 18.3110SWIFT J1929.8+1821 HMXB/SFXT? 71 ( 2.4)-- 1 54 1955498 ( 3090)
    23 GX 9+1   270.385 -20.5290Sgr X-3 LMXB/NS 69 ( 6.9) 38 ( 5.2) 1 ( 3.1) 36 82 275558563 ( 25)
    24 NGC 6300   259.248 -62.8210Sy2 67 ( 2.1)-- 3 0 4 1 ( 0)
    25 GX 349+2   256.435 -36.4230V1101 Sco LMXB/NS 61 ( 7.1) 80 (12.2)- 73 198 398453623 ( 4965)
    26 IGR J08023-6954   120.570 -69.9100DENIS-P J080241.6-695338 X-ray source 61 ( 2.5)-- 0---
    27 PKS 0648-16   102.602 -16.6277 Radio source 61 ( 2.4)-- 0---
    28 LMC X-4   83.2060 -66.3700HMXB/NS 61 ( 2.7)-- 18 96 144357991 ( 597)
    29 GX 1+4   263.009 -24.7460V2116 Oph LMXB/NS 58 ( 5.6) 93 (12.1)- 45 345 268155732 ( 2856)
    30 H 1145-619   177.000 -62.20704U 1145-61 HMXB 57 ( 3.2)-- 0 69 1257270 ( 1318)
    31 4U 1702-429   256.563 -43.0360Ara X-1 LMXB/NS 53 ( 6.8) 50 ( 8.2)- 22 82 122656090 ( 2498)
    32 GX 17+2   274.006 -14.0360NP Ser LMXB/NS 51 ( 4.8) 47 ( 6.0)- 85 247 417653536 ( 5052)
    33 GRS 1758-258   270.302 -25.74301RXS J180112.6-254435 LMXB/BHC 47 ( 5.0) 42 ( 6.1)- 45 124 328757116 ( 1472)
    34 4U 1909+07   287.701 7.598004U 1908+075 HMXB/NS -- 12 ( 4.3) 14 74 27455151 ( 3437)
    35 IGR J21247+5058   321.164 50.97404C 50.55 BL Radio galaxy 45 ( 4.5)-- 7 0 35 1 ( 0)
    36 H1705-440   257.225 -44.10204U 1705-440 LMXB/NS 40 ( 5.1) 40 ( 6.6)- 25 127 167754921 ( 3667)
    37 Ser X-1   279.990 5.03600MM Ser LMXB/NS 29 ( 2.2) 32 ( 2.8) 19 ( 7.0) 17 45 45256773 ( 1815)
    38 H 1608-522   243.179 -52.4230QX Nor LMXB/NS 28 ( 3.7) 41 ( 7.4)- 18 341 113954268 ( 4320)
    39 H 1820-303   275.919 -30.36104U 1820-30 LMXB/NS - 59 ( 6.9)- 55 165 356754986 ( 3602)
    Source NameRA J2000 DegsDec J2000 DegsAlternate NameSource TypeToday#Yesterday#Tenday#Mean*Peak*Days*Last Day*
    # Explanation of table headings 7-9:
  • Today: Todays source rate in units of mCrab (Significance in parentheses)
  • Yesterday: Yesterdays source rate in units of mCrab (Significance in parentheses)
  • Tenday: Average source rate over the last ten days (Significance in parentheses)
    • All of these are only posted if the significance is >= 2-sigma.

    * Explanation of last four table headings:

  • Mean: Mean source rate in units of mCrab
  • Peak: Peak source rate in units of mCrab (also requires >5-sigma significance)
  • Days: Number of days with >5-sigma source detection
  • Last Day: MJD of last 5-sigma detection (Days since last detection)
    • -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      Sco X-1 Sco X-1
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10003] Sco X-1 RA= 244.979 degs; Dec= -15.6400 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      Crab Crab
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10001] Crab RA= 83.6330 degs; Dec= 22.0150 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      Vela X-1 Vela X-1
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10005] Vela X-1 RA= 135.529 degs; Dec= -40.5550 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      Cyg X-1 Cyg X-1
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10002] Cyg X-1 RA= 299.591 degs; Dec= 35.2020 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      4U 1700-377 4U 1700-377
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10029] 4U 1700-377 RA= 255.987 degs; Dec= -37.8440 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      Her X-1 Her X-1
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10004] Her X-1 RA= 254.457 degs; Dec= 35.3420 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      GRS 1915+105 GRS 1915+105
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10007] GRS 1915+105 RA= 288.798 degs; Dec= 10.9460 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      GX 301-2 GX 301-2
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10051] GX 301-2 RA= 186.657 degs; Dec= -62.7700 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      XTE J1908+094 XTE J1908+094
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [33869] XTE J1908+094 RA= 287.221 degs; Dec= 9.38500 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      GRO J2058+42 GRO J2058+42
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [33658] GRO J2058+42 RA= 314.750 degs; Dec= 41.7200 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      GX 5-1 GX 5-1
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10058] GX 5-1 RA= 270.284 degs; Dec= -25.0780 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      4U 1636-536 4U 1636-536
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10069] 4U 1636-536 RA= 250.231 degs; Dec= -53.7510 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      GX 339-4 GX 339-4
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10053] GX 339-4 RA= 255.706 degs; Dec= -48.7900 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      MAXI J1932+091 MAXI J1932+091
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [34096] MAXI J1932+091 RA= 293.293 degs; Dec= 9.19473 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      4U 1901+03 4U 1901+03
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10568] 4U 1901+03 RA= 285.914 degs; Dec= 3.21500 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      AO 0235+16 AO 0235+16
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [30208] AO 0235+16 RA= 39.6622 degs; Dec= 16.6165 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      RX J1940.2-1025 RX J1940.2-1025
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10570] RX J1940.2-1025 RA= 295.048 degs; Dec= -10.4240 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      Cen X-3 Cen X-3
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10035] Cen X-3 RA= 170.313 degs; Dec= -60.6230 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      MAXI J1348-630 MAXI J1348-630
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [34134] MAXI J1348-630 RA= 207.054 degs; Dec= -63.2740 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      1E 1740.7-2942 1E 1740.7-2942
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10006] 1E 1740.7-2942 RA= 265.978 degs; Dec= -29.7450 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      SMC X-1 SMC X-1
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10114] SMC X-1 RA= 19.2710 degs; Dec= -73.4430 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      IGR J19294+1816 IGR J19294+1816
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [33682] IGR J19294+1816 RA= 292.483 degs; Dec= 18.3110 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      GX 9+1 GX 9+1
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10059] GX 9+1 RA= 270.385 degs; Dec= -20.5290 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      NGC 6300 NGC 6300
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10584] NGC 6300 RA= 259.248 degs; Dec= -62.8210 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      GX 349+2 GX 349+2
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10055] GX 349+2 RA= 256.435 degs; Dec= -36.4230 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      IGR J08023-6954 IGR J08023-6954
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10604] IGR J08023-6954 RA= 120.570 degs; Dec= -69.9100 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      PKS 0648-16 PKS 0648-16
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [33036] PKS 0648-16 RA= 102.602 degs; Dec= -16.6277 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      LMC X-4 LMC X-4
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10081] LMC X-4 RA= 83.2060 degs; Dec= -66.3700 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      GX 1+4 GX 1+4
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10008] GX 1+4 RA= 263.009 degs; Dec= -24.7460 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      H 1145-619 H 1145-619
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10062] H 1145-619 RA= 177.000 degs; Dec= -62.2070 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      4U 1702-429 4U 1702-429
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10309] 4U 1702-429 RA= 256.563 degs; Dec= -43.0360 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      GX 17+2 GX 17+2
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10049] GX 17+2 RA= 274.006 degs; Dec= -14.0360 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      GRS 1758-258 GRS 1758-258
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10048] GRS 1758-258 RA= 270.302 degs; Dec= -25.7430 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      4U 1909+07 4U 1909+07
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10561] 4U 1909+07 RA= 287.701 degs; Dec= 7.59800 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      IGR J21247+5058 IGR J21247+5058
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10666] IGR J21247+5058 RA= 321.164 degs; Dec= 50.9740 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      H1705-440 H1705-440
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10072] H1705-440 RA= 257.225 degs; Dec= -44.1020 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      Ser X-1 Ser X-1
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10304] Ser X-1 RA= 279.990 degs; Dec= 5.03600 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      H 1608-522 H 1608-522
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10067] H 1608-522 RA= 243.179 degs; Dec= -52.4230 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      H 1820-303 H 1820-303
    Dashed lines show average rate (and +/- 1 sigma standard deviation) for this source (derived from this plot)
    [10076] H 1820-303 RA= 275.919 degs; Dec= -30.3610 degs
    Daily light curves: FITS version ASCII version
    Orbit light curves: FITS version ASCII version
    Full mission light curve

    This page was last modified on Mon Apr 15 19:35:45 UTC 2019

    The BAT Transient Monitor contacts are:
    Amy Lien, amy.y.lien@nasa.gov,
    301.286.3624

    Hans Krimm, hans.krimm@nasa.gov,
    301-286-6955