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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

37708 results found.

  1. GRB 170317A: 15 GHz upper limits from AMI
  2. GRB 170330A: LCO Cerro Tololo observations
  3. Konus-Wind observation of GRB 170329A
  4. GRB 170329A: AstroSat CZTI detection
  5. IBAS trigger 7789 is not a GRB
  6. GRB 170331A: LCO Sutherland observations
  7. GRB 170331A: Prompt enhanced Swift-XRT position
  8. Fermi trigger 512347439/GRB 170327A: MASTER-SAAO possible OT detection
  9. GRB 170331A: Swift detection of a burst
  10. GRB 170330A: Prompt enhanced Swift-XRT position
  11. GRB 170330A: Swift detection of a burst
  12. GRB 170329A: Fermi GBM detection
  13. GRB 170329A: Fermi-LAT detection
  14. GRB 170325B: POLAR Observation
  15. GRB 170325A: Fermi GBM observation
  16. LIGO/Virgo G277583: Konus-Wind observations
  17. GRB 170325A, Swift-BAT detection of a short GRB
  18. LIGO/Virgo G277583: Fermi GBM Observations
  19. Konus-Wind observation of GRB 170320A
  20. GRB 170320A: POLAR Observation
  21. LIGO/Virgo G277583: INTEGRAL search for an X-ray and gamma-ray counterpart
  22. Fermi GBM Observation of IceCube-170321A
  23. Fermi GBM trigger 511851891/170322212 is not a GRB
  24. INTEGRAL SPI-ACS observation of AMON IceCube EHE 80305071 129307
  25. IPN Triangulation of GRB 170320A (long/intense)
  26. GRB 170318A: KAIT Optical Upper Limit
  27. GRB 170317A: Mondy optical observations
  28. GRB 170318B: Swift-BAT refined analysis
  29. GRB 170317A: POLAR observation
  30. GRB 170318B: RATIR Optical and NIR Observations
  31. GRB 170317A: RATIR Optical and NIR Observations
  32. GRB 170318B: Swift/UVOT Upper Limits
  33. GRB 170318B: Swift-XRT refined Analysis
  34. GRB 170318A: Swift-XRT refined Analysis
  35. GRB 170318A: RATIR Optical and NIR Observations
  36. GRB 170318A: Swift/UVOT Upper Limits
  37. GRB 170318B: Fermi GBM observation
  38. GRB 170318A: Swift-BAT refined analysis
  39. GRB 170317A: RATIR Optical and NIR Observations
  40. GRB 170318B: Enhanced Swift-XRT position
  41. GRB 170318B: Prompt enhanced Swift-XRT position
  42. GRB 170318B: Swift detection of a burst
  43. GRB 170318A: Enhanced Swift-XRT position
  44. GRB 170315A: POLAR observation
  45. GRB 170318A: Prompt enhanced Swift-XRT position
  46. GRB 170318A: Swift detection of a burst
  47. GRB 170317A: LCO FTN observations
  48. GRB 170317A: MITSuME Okayama Optical Observation
  49. GRB 170317A: Swift-BAT refined analysis
  50. GRB 170317A: Swift/UVOT Detection
  51. GRB 170317A: Mondy optical observations
  52. GRB 170317A: MITSuME Okayama Ks-band upper-limit
  53. GRB 170317A: Swift-XRT refined Analysis
  54. GRB 170317A: GMG observation
  55. GRB 170317A : Xinglong TNT optical observation
  56. GRB 170317A: Enhanced Swift-XRT position
  57. GRB 170317A: ISON-Ussuriysk aferglow confirmation
  58. GRB 170317A: Swift detection of a burst with an optical counterpart
  59. LIGO/Virgo G277583: Swift/BAT data search
  60. GRB 170307A: 15 GHz upper limit from AMI
  61. LIGO/Virgo G275697: Fermi-LAT search for a high-energy gamma-ray counterpart
  62. GRB 170311B: AstroSat CZTI detection
  63. Fermi GBM trigger 510642159/170308210 is not a GRB
  64. Konus-Wind observation of GRB 170311B
  65. IPN Triangulation of GRB 170311B (long/very intense)
  66. GRB 170311A: VLT observations
  67. INTEGRAL observation of IceCube HESE 65274589 129281
  68. GRB 170311A: Swift-BAT refined analysis
  69. GRB 170311A: Further GROND analysis
  70. GRB 170311A: Swift-XRT refined Analysis
  71. GRB 170311A: Swift/UVOT Upper Limits
  72. GRB 170311A: Enhanced Swift-XRT position
  73. GRB 170311A: GROND upper limits
  74. GRB 170311A: MASTER-OAFA early optical observations
  75. GRB 170311A: Swift detection of a burst
  76. GRB 170309A: POLAR Observation
  77. GRB170306A: SALT observations
  78. GRB 170306A: GROND afterglow detection
  79. GRB 170306B: POLAR observation
  80. GRB 170307A (trigger 741528): Swift-BAT refined analysis
  81. GRB 170305A: POLAR observation
  82. GRB 170307A: Fermi GBM observation
  83. Swift Trigger 741528: a possible GRB
  84. Konus-Wind observation of GRB 170306B
  85. GRB 170306B: Swift-XRT observations
  86. GRB 170306A, Swift-BAT refined analysis
  87. GRB 170306A: Swift-XRT refined Analysis
  88. GRB 170306B: Fermi GBM detection
  89. GRB 170306B: Fermi-LAT detection
  90. GRB 170306B: Tiled Swift observations
  91. IPN Triangulation of GRB 170305A (short)
  92. GRB 170306A: Swift/UVOT Upper Limits
  93. GRB 170306A: GROND observations
  94. GRB 170306A: LCO Cerro Tololo observations
  95. GRB 170306A: Swift detection of a burst
  96. GRB170305A: Fermi GBM detection
  97. GRB 170304A: Fermi GBM observation
  98. LIGO/Virgo G275404: HAWC follow-up
  99. Konus-Wind observation of GRB 170228A
  100. Fermi GBM trigger 510207699/170303182 is not a GRB

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