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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"

24588 results found.

  1. GRB 180624A: GROND observations
  2. GRB 180624A: LCO Siding Springs afterglow candidate
  3. GRB 180624A: MITSuME Okayama optical upper limits
  4. GRB 180624A: Swift-XRT refined Analysis
  5. GRB 180623A: Swift-BAT refined analysis
  6. GRB 180623A: Swift-XRT refined Analysis
  7. Konus-Wind observation of GRB 180620B
  8. Konus-Wind observation of GRB 180620A
  9. GRB 180620B: VLT/X-shooter redshift
  10. Konus-Wind observation of GRB 180618A (a short GRB with extended emission)
  11. GRB 180620B: Swift-BAT refined analysis
  12. GRB 180613A: Afterglow confirmation and added photometry
  13. GROND observations of GRB 180620B
  14. GROND observations of GRB 180620A
  15. GRB 180620B: Swift-XRT refined Analysis
  16. GRB 180618B: CALET Gamma-Ray Burst Monitor detection
  17. GRB 180620A: Swift-BAT refined analysis
  18. GRB 180620B: Fermi GBM detection
  19. GRB 180620A: KAIT Optical Observations
  20. GRB 180620A: Swift-XRT refined Analysis
  21. GRB 180620A: LCO McDonald observations
  22. GRB 180620A: MASTER OT observation
  23. GRB 180618A: MASTER OT observation (a short GRB with extended emission)
  24. GRB 180618A: Swift-BAT refined analysis (a short GRB with extended emission)
  25. GRB 180618A: Fermi GBM detection
  26. GRB 180618A: LT prompt observations
  27. GRB 180614A: 1.5m OSN I-band observation
  28. GRB 180614A: Swift-BAT refined analysis
  29. GRB 180614A: MASTER observation
  30. GRB 180614A: Swift detection of a burst
  31. Konus-Wind observation of GRB 180611A
  32. GRB 180611A: Fermi GBM observation
  33. IPN Triangulation of GRB 180611A (long)
  34. GRB 180605A: Fermi GBM observation
  35. IPN Triangulation of GRB 180605A (long)
  36. GRB 180602A: MITSuME Ishigakijima optical upper limits
  37. GRB 180602B: Fermi GBM detection
  38. GRB 180602A: MITSuME Akeno optical upper limits
  39. GRB 180602A: Swift-XRT refined Analysis
  40. GRB 180602A: Swift-BAT refined analysis
  41. GRB 180602A: MITSuME Okayama optical upper limits
  42. GRB 180602A: Swift detection of a burst
  43. Konus-Wind observation of GRB 180529A
  44. GRB 180529A: CALET Gamma-Ray Burst Monitor detection
  45. IPN Triangulation of GRB 180529A (short/hard)
  46. Swift Trigger 834937 is not a GRB
  47. Konus-Wind observation of GRB 180526A
  48. IPN Triangulation of GRB 180526A (long)
  49. GRB 180526A: CALET Gamma-Ray Burst Monitor detection
  50. Konus-Wind observation of GRB 180523A
  51. IPN Triangulation of GRB 180523A
  52. GRB180523B: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 548793993)
  53. GRB 180514A: MITSuME Ishigakijima optical upper limits
  54. GRB 180514A: MITSuME Akeno optical upper limits
  55. GRB 180510A: MITSuME Ishigakijima optical upper limits
  56. GRB 180514A: 1.5m OSN optical observations
  57. GRB 180514A: GOTO Optical Observations
  58. GRB 180514A: Swift-BAT refined analysis
  59. GRB 180512A: VLT/HAWK-I NIR Observations
  60. GRB 180514A: Swift detection of a burst
  61. Konus-Wind observation of GRB 180510A
  62. GRB 180512A: Swift-BAT refined analysis
  63. GRB 180512A: LT prompt observations
  64. GRB 180512A: GROND upper limits
  65. GRB 180512A: Swift detection of a burst
  66. GRB 180510A: Swift-XRT refined Analysis
  67. GRB 180510B: Swift-BAT refined analysis
  68. Swift Trigger 831888: a possible GRB or Galactic transient
  69. GRB 180510A: Swift detection of a burst
  70. Chandra observations of GW170817 260 days since merger: first statistically significant evidence for an X-ray decay
  71. GRB 180504A: Swift-BAT refined analysis
  72. GRB 180505A: Fermi GBM detection
  73. GRB 180504A: NOT afterglow candidate
  74. GRB 180416B: AstroSat CZTI detection
  75. Konus-Wind observation of GRB 180427A
  76. IPN Triangulation of GRB 180427A
  77. GRB 180427A: Fermi GBM detection
  78. GRB 180425A: Swift-BAT refined analysis
  79. GRB 180418A: MITSuME Ishigakijima Optical Observation
  80. Retraction of IceCube GCN/AMON NOTICE 71165249_130949
  81. GRB 180418A: Further GROND observations
  82. GRB 180418A: Xinglong TNT optical upper limit
  83. GRB 180418A: NOT optical observations
  84. GRB 180418A: Gemini-North imaging and spectroscopy
  85. GRB 180418A: Swift-BAT refined analysis
  86. GRB 180418A: Fermi GBM observation
  87. GRB 180416B: CALET Gamma-Ray Burst Monitor detection
  88. LIGO/Virgo G299232: LOFAR follow-up
  89. GRB 180418A: Swift-XRT observations
  90. GRB 180418A: LCO FTN afterglow confirmation
  91. GRB 180418A: KAIT Optical Afterglow Candidate
  92. GRB 180418A: Swift detection of a short burst
  93. GRB 180416A: Fermi GBM detection
  94. GRB 180411A: CALET Gamma-Ray Burst Monitor detection
  95. GRB 180411B: CALET Gamma-Ray Burst Monitor detection
  96. Konus-Wind observation of GRB 180411A
  97. GRB 180411A: Tautenburg observations
  98. GRB 180410A: Fermi GBM observation
  99. GRB 180411A: Fermi GBM detection
  100. GRB 180411A: Swift-BAT refined analysis

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