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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').

559 results found.

  1. Konus-Wind observation of GRB 100829A
  2. GRB 100902A: MASTER Prompt Optical Observations
  3. GRB 100902A: MASTER Optical Early Limit
  4. Konus-Wind observation of GRB 100816A
  5. GRB 100807A: Swift-BAT refined analysis
  6. GRB 100718A: MASTER-Net optical prompt and alert observations
  7. GRB 100719A: Swift-BAT refined analysis
  8. GRB 100702A, Swift-BAT refined analysis
  9. GRB 100625A: Swift-XRT Team refined analysis
  10. GRB 100615A: Swift-BAT refined analysis
  11. Konus-Wind observation of GRB 100528A
  12. GRB 100526A: Swift detection of a burst
  13. Swift-BAT trigger 421695 is likely not astrophysical
  14. GRB 100425A: Swift-BAT refined analysis
  15. GRB 100423A: Swift-BAT refined analysis
  16. GRB 100418A: Swift-BAT refined analysis
  17. GRB 100316B: Swift-BAT refined analysis
  18. GRB 100213A: Swift-BAT refined analysis
  19. GRB 100213B: Swift-BAT refined analysis
  20. GRB 100212A: Swift-BAT refined analysis
  21. Konus-Wind observation of GRB 091208A
  22. GRB 091208A: Swift-XRT observations
  23. GRB 091208A Swift-BAT refined analysis
  24. Konus-Wind observation of GRB 091120
  25. GRB 091020, Swift-BAT refined analysis
  26. Konus-Wind observation of GRB 091003A
  27. GRB 090926B: Swift-BAT refined analysis
  28. GRB 090912: optical observation
  29. GRB 090831C BAT refined analysis
  30. Konus-Wind observations of GRB 090831A
  31. Konus-Wind observations of GRB 090823
  32. GRB 090814C: Fermi GBM detection
  33. Konus-Wind observations of GRB090813
  34. Swift-BAT trigger 358760 is most likely not a GRB
  35. GRB 090709A: Swift XRT Timing Analysis
  36. Konus-Wind and Konus-RF observations of GRB 090715B
  37. GRB 090709B, Swift-BAT refined analysis
  38. GRB 090621A: Enhanced Swift-XRT position
  39. GRB 090620: Fermi GBM detecion
  40. GRB 090621: Swift-XRT Team refined analysis
  41. GRB 090608: Fermi GBM detection
  42. GRB 090531B: Swift-BAT refined analysis
  43. GRB 090516 - Zadko Telescope observations
  44. GRB 090509 - Zadko Telescope observations
  45. AGILE detection of GRB 090510
  46. GRB 090429A: Swift-BAT refined analysis
  47. GRB 090419: Swift/UVOT Observations
  48. Konus-Wind and Konus-RF observations of GRB 090408b
  49. GRB 090313: Zadko Telescope observations
  50. GRB 090309, Swift-BAT refined analysis
  51. GRB 090305, Swift-BAT refined analysis
  52. GRB 090301A: Swift-BAT refined analysis
  53. GRB 090113: Swift detection of a burst
  54. Swift triggered on the HMXB 1A 1118-61
  55. GRB 081221, Swift-BAT refined analysis
  56. Konus-Wind observation of GRB 081203B
  57. Konus-Wind observation of GRB 081126
  58. GRB 081118: Swift-BAT refined analysis
  59. GRB 081012: Fermi GBM detection
  60. Konus-Wind observation of GRB 081001
  61. GRB 080916C: Swift XRT refined analysis
  62. Swift-BAT/-XRT refined analysis on trigger 324362 (LS I +61 303)
  63. Swift trigger 324362 (LS I +61 303 ?): XRT
  64. Swift trigger 324362 (LS I +61 303 ?)
  65. GLAST Burst Monitor detection of GRB 080810
  66. GRB 080727B: REM prompt observations
  67. Konus-Wind observation of GRB 080605
  68. GRB 080514B: UVOT Observations
  69. Konus-Wind observation of GRB 080513
  70. Konus-Wind observation of GRB 080507
  71. VLA radio observations of GRB 080413A
  72. GRB080330: MAGIC telescope GeV observation
  73. GRB 080330, Swift-BAT refined analysis
  74. VLT/UVES redshift of GRB 080319B from FeII fine-structure lines
  75. Konus-Wind observation of GRB 080211
  76. GRB 071028: Swift-XRT Team refined analysis
  77. Konus-Wind observation of GRB 071020
  78. GRB 071020: Swift-XRT refined analysis
  79. GRB 071020: Swift detection of a bright burst
  80. GRB 071011: Confirmation of P60 optical afterglow
  81. GRB 071011: P60 Optical Afterglow Candidate
  82. GRB 071011, Swift-BAT refined analysis
  83. GRB 071011: Optical afterglow candidate
  84. Konus-Wind observation of GRB 071006
  85. GRB 071003: Keck HIRES spectroscopy
  86. GRB 070809: The Swift evidence for the SHB nature of this burst
  87. GRB 070714A: Swift/UVOT Upper limits
  88. GRB 070714: Swift detection of a bright burst, possibly short
  89. GRB 070621: Swift detection of a burst
  90. GRB 070610: Swift-UVOT Upper Limits
  91. GRB 070429B: Swift XRT refined analysis
  92. GRB 070412: Swift detection of a burst
  93. Konus-Wind and Konus-A observations of GRB 070220
  94. GRB070208 - SDSS Pre-Burst Observations
  95. GRB 070208: Early IR detection and afterglow astrometry
  96. GRB070208: Faulkes Telescope North Afterglow Identification
  97. Konus-Wind observation of GRB 061222A
  98. GRB 061201: UVOT Observations of a Fading Optical Afterglow
  99. GRB061126: Optical afterglow observations from MIRO
  100. GRB 061004: Swift/XRT Astrometry Correction

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