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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"

27284 results found.

  1. GRB 180721A: Swift-XRT refined Analysis
  2. GRB 180720B: Swift-BAT refined analysis
  3. GRB 180721A: LCO Haleakala observations
  4. GRB 180721A: Swift detection of a burst
  5. GRB 180720B: MAXI/GSC detection
  6. GRB 180720C: Swift/UVOT Upper Limits
  7. GRB 180720C: LT observations
  8. GRB 180720C: Fermi GBM observation
  9. GRB 180706A: OSN detection
  10. GRB 180720B: OSN detection, fading slower?
  11. GRB 180720B: Swift-XRT refined Analysis
  12. GRB 180720C: Swift detection of a burst or possible Galactic Transient
  13. GRB 180720B: Fermi GBM observation
  14. GRB 180720B : Fermi-LAT detection
  15. GRB 180715A: MASTER optical observation
  16. GRB 180720B: Kanata 1.5m optical/NIR observation
  17. GRB 180720B: LCO Haleakala possible bright optical candidate
  18. Correction: Swift trigger #848890 is GRB 180720B (not GRB 180720A)
  19. GRB 180720A: Fermi GBM observation
  20. GRB 180720B: Swift detection of a burst
  21. GRB 180718A: MASTER optical observation
  22. GRB 180718B: MASTER optical observation
  23. GRB180715B: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 553369644)
  24. GRB 180715A: Swift/UVOT Upper Limits
  25. Swift detects a flare from AX 1631.9-4752
  26. GRB 180718B: Fermi GBM detection
  27. GRB 180716A: CALET Gamma-Ray Burst Monitor detection
  28. GRB 180718B: Fermi-LAT detection
  29. GRB 180718A: Fermi GBM detection
  30. GRB 180718A short GRB detected by IPN and found in ground analysis of BAT data
  31. Swift Trigger 848621 is not an astrophysical event
  32. Trigger 848584: Swift detection of AX 1631.9-4752
  33. GRB 180715A: CALET Gamma-Ray Burst Monitor detection
  34. GRB 180715A: LCO Sutherland observations
  35. GRB 180715A: COATLI Optical Observations
  36. GRB 180715A: Fermi GBM detection
  37. GRB 180715A: Swift-BAT refined analysis
  38. GRB 180715A: LCO Sutherland possible optical candidate
  39. GRB 180715A: Swift-XRT observations
  40. GRB 180715A: Swift detection of a short hard burst
  41. IceCube-171106A: MASTER optical observation
  42. GRB 180703A: optical afterglow confirmation
  43. GRB 180711A: CALET Gamma-Ray Burst Monitor detection
  44. IceCube-170922A: First Optical observations of the Neutrino Trigger by MASTER Global Net and 25 IceCube alerts inspection.
  45. Swift Trigger 847216: misidentification of IGR J16385-2057
  46. GRB 180709A: BOOTES-5/JGT optical observations
  47. GRB 180709A: Swift-BAT refined analysis
  48. GRB 180709A: Swift/UVOT Upper Limits
  49. GRB 180709A: Swift-XRT refined Analysis
  50. GRB 180709A: Optical limits
  51. GRB 180709A: COATLI Optical Observations
  52. GRB 180703B: further analysis of CGBM data
  53. GRB 180709A: Swift detection of a burst
  54. Trigger 846740: Swift trigger near NGC5055
  55. GRB 180703A: MASTER optical observation
  56. IPN Triangulation of GRB 180703A
  57. GRB 180706A: Swift/UVOT Detection
  58. GRB 180706A: Swift-BAT refined analysis
  59. GRB 180705A: Swift-XRT refined Analysis
  60. GRB 180706A: Fermi GBM observation
  61. GRB 180706A: Swift-XRT refined Analysis
  62. Konus-Wind observation of GRB 180701A
  63. GRB 180705A: Swift/UVOT Upper Limits
  64. GRB 180705A: RATIR Optical Observations
  65. GRB 180706A: COATLI Optical Detection
  66. GRB 180706A: Swift detection of a burst with optical counterpart
  67. IPN Triangulation of GRB 180703B
  68. GRB 180705A: Swift-BAT refined analysis
  69. Fermi GBM triggers 552488966/180705548 and 552490104/180705561 are not GRBs
  70. GRB 180705A: Swift-XRT observations
  71. GRB 180705A: Swift detection of a burst
  72. GRB 180703A: AstroSat CZTI detection
  73. GRB 180704B: CALET Gamma-Ray Burst Monitor detection
  74. GRB 180703A: Swift/UVOT Upper Limits
  75. GRB 180703B: Fermi GBM detection
  76. GRB 180703A: Fermi GBM detection
  77. GRB 180704A: Swift-XRT refined Analysis
  78. GRB 180704A: Swift-BAT refined analysis
  79. GRB 180704A: Swift/UVOT Upper Limits
  80. GRB 180703A: LCO Sutherland possible optical candidate
  81. GRB150101B: INTEGRAL prompt gamma-ray signal from a possible GRB170817A-analogue
  82. GRB 180703B: CALET Gamma-Ray Burst Monitor detection
  83. GRB 180704A: Swift-XRT observations
  84. GRB 180704A: MASTER optical observation
  85. GRB 180704A: Swift detection of a burst
  86. GRB 180703B: Fermi-LAT detection
  87. GRB 180703A: Fermi-LAT detection
  88. GRB 180630A: Swift/UVOT Detection
  89. GRB 180630A: Swift-BAT refined analysis
  90. GRB 180630A: Swift-XRT refined Analysis
  91. GRB 180630A: Fermi GBM detection
  92. GRB 180626C / Fermi trigger 551697835: MASTER inspection
  93. GRB 180630A: Swift detection of a burst with an optical counterpart
  94. GRB 180626C: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 551697835)
  95. Konus-Wind observation of GRB 180626A
  96. Konus-Wind observation of GRB 180626C
  97. GRB 180624A: NOT optical counterpart
  98. GRB 180626A: RATIR Optical Observations
  99. IPN Triangulation of GRB 180626C (short)
  100. GRB 180626A: Swift-BAT refined analysis

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