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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').

18051 results found.

  1. GRB 080707, Swift-BAT refined analysis
  2. GRB 080707: Swift XRT refined analysis
  3. GRB 080707: Enhanced Swift-XRT position
  4. GRB 080707: GROND Detection of the Optical Afterglow Candidate
  5. GRB 080707: Swift detection of a burst
  6. Refined analysis of Swift Trigger 316063, is IGR J08408-4503
  7. Trigger 316063: Swift detection of a transient
  8. GRB 080703: GROND Upper Limits
  9. GRB 080702B: GROND Upper Limits
  10. GRB 080703: Swift-XRT refined analysis
  11. GRB 080703: UVOT Follow-Up Observation
  12. GRB 080703: Enhanced Swift-XRT position
  13. GRB 080703, Swift-BAT refined analysis
  14. GRB 080702B Swift-BAT refined analysis
  15. GRB 080703: Swift detection of a burst with optical afterglow
  16. GRB 080703A: ROTSE-III Detection of Optical Counterpart
  17. Swift/UVOT observation of GRB080702A
  18. GRB 080702B: Swift XRT and UVOT observations
  19. GRB 080701A: Early RAPTOR optical limits
  20. Swift Trigger 315630: Swift/UVOT Upper Limits
  21. GRB 080702A, Swift-BAT refined analysis
  22. GRB 080702A: Swift-XRT Team refined analysis
  23. GRB 080702B : Burst detected in BAT during Swift slew
  24. GRB 080702A: Enhanced Swift-XRT position
  25. Swift Trigger 315630: TLS R-band observation
  26. Swift Trigger 315630: Probably not a GRB
  27. GRB 080702: Swift detection of a short burst
  28. GRB 080701: Swift-XRT refined analysis
  29. TLS I-Band Observation of GRB 080701A
  30. GRB 080701A: Swift/UVOT Upper Limits
  31. GRB 080701: Enhanced Swift-XRT position
  32. GRB 080701A, Swift-BAT refined analysis
  33. Trigger 315630: Swift detection of a possible burst
  34. GRB 080701: Swift-XRT Prompt Analysis
  35. GRB 080701: Swift detection of a burst
  36. GRB 080623: Suzaku WAM observation of the prompt emission
  37. GRB 080625: Swift/UVOT Follow-Up Observations
  38. GRB 080625:Swift-XRT detection of the afterglow
  39. GRB 080625: Swift/UVOT Detection of an Optical Afterglow
  40. GRB 080623: GROND upper limits
  41. GRB080623: Swift UVOT followup observations
  42. GRB 080623: Swift-XRT refined analysis
  43. GRB 080623, Swift-BAT refined analysis
  44. GRB 080623: Enhanced Swift-XRT position
  45. GRB 080623: TAROT La Silla observatory optical observations
  46. GRB 080623: Swift/UVOT Non-Detection of an Optical Afterglow
  47. GRB 080623: Swift XRT prompt analysis
  48. GRB 080623: Swift detection of a burst
  49. Swift trigger 314975 is not a GRB
  50. Swift-BAT trigger 314975 possible burst
  51. GRB080607: optical observation
  52. GRB 080603b: optical observation
  53. GRB 070809: Putative host galaxy and redshift
  54. Konus-Wind observation of GRB 080613B
  55. GRB 080613A: Swift-XRT detection of the afterglow
  56. GRB080613A: Swift/UVOT Upper Limits
  57. GRB 080613B: GROND Upper Limits
  58. GRB080613B: Swift/UVOT Upper Limits
  59. GRB 080613B, Swift-BAT refined analysis
  60. GRB 080613B: Swift-XRT refined analysis
  61. GRB 080613B: Swift detection of a burst
  62. GRB 080603b: optical observation
  63. Swift observations of BAT Slew Survey event (Trigger=010)
  64. GRB 080603A: final Swift-XRT observations.
  65. GRB 080607: AGILE-MCAL observation of the prompt emission
  66. GRB 080603B - TLS 2nd Epoch: Another Break
  67. GRB 080605: TLS 3rd Epoch - Source Confusion
  68. Konus-Wind observation of GRB 080607
  69. GRB080607: RTT150 optical observations
  70. GRB 080607: Swift-XRT refined analysis
  71. Swift/UVOT Observations of GRB080607
  72. GRB 080605: optical observations
  73. GRB 080607 KAIT observations
  74. Konus-Wind observation of GRB 080605
  75. GRB 080607: Enhanced Swift-XRT position
  76. GRB 080607, Swift-BAT refined analysis
  77. GRB 080605: GROND 2nd epoch observations
  78. GRB 080607: Swift detection of a burst with optical afterglow
  79. GRB 080607: ROTSE-III Detection of Optical Counterpart
  80. GRB 080605: Swift-UVOT refined analysis
  81. GRB 080604: VLA radio upper limit
  82. GRB 080605, Swift-BAT refined analysis
  83. GRB 080603B: VLA radio upper limit
  84. GRB 080605, Swift-BAT refined analysis
  85. GRB 080605: Swift-XRT refined analysis
  86. GRB 080605: MASTER VWF 46 s AT observation
  87. GRB 080605: Enhanced Swift-XRT position
  88. GRB 080605: GROND detection of the optical afterglow candidate
  89. GRB080605: optical observations
  90. GRB 080605: Liverpool Telescope optical afterglow candidate
  91. GRB 080605: Swift/UVOT Position of the Optical Afterglow
  92. GRB 080605: TLS RRM Afterglow
  93. GRB 080605: Swift detection of a burst with an optical afterglow
  94. GRB 080603B: TLS Afterglow Observation
  95. Swift/UVOT observations of GRB080604
  96. GRB 080604, Swift-BAT refined analysis
  97. GRB 080604: Swift-XRT refined analysis
  98. GRB 080603B : Liverpool Telescope Observations
  99. Konus-Wind observation of GRB 080603B
  100. GRB 080603B: Swift-XRT refined analysis

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