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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"

12180 results found.

  1. GRB 141121A: Continued Mondy optical observations
  2. GRB 141124A​: iPTF upper limits​
  3. GRB 141121A: Mondy optical observations
  4. GRB 141121A: AAO optical observations
  5. GRB 141121A: Swift-XRT refined Analysis
  6. GRB 141118A: iPTF Optical Observations
  7. GRB 141121A: MAXI/GSC detection
  8. Konus-Wind observation of GRB 141118A
  9. Konus-Wind observation of GRB 141109A
  10. GRB 141109B: IRAM 30m millimetre observations
  11. GRB 141109B: Swift-XRT refined Analysis
  12. GRB 141109A: Swift-XRT refined Analysis
  13. GRB 141109B: Swift-BAT refined analysis
  14. GRB 141109B: Swift detection of a burst
  15. GRB 141104A: Swift-XRT observations
  16. GRB 141017A: Skynet PROMPT-CTIO/SSO Observations
  17. Konus-Wind observation of GRB 141104A
  18. IPN Triangulation of GRB 141104A (long/very bright)
  19. Konus-Wind observation of GRB 141102A
  20. GRB 141102A: Fermi-LAT detection
  21. GRB 141031A, Swift-BAT refined analysis
  22. GRB 141031B: Swift detection of a burst
  23. GRB 141031A: Swift detection of a burst
  24. GRB 141028A: Swift-XRT observations
  25. GRB 141029A: MAXI/GSC detection
  26. GRB 141028A: Fermi-LAT detection
  27. GRB 141026A: GTC spectroscopy
  28. GRB 141026A: SAO RAS Zeiss-1000 observations
  29. GRB 141020A: AAO optical upper limit
  30. GRB 141020A: Khureltogot optical upper limit
  31. GRB 141020A: Mondy optical observations
  32. GRB141015A iTelescope observation
  33. GRB 141022A: GROND Detection of a possible Optical Afterglow Candidate
  34. GRB 141020A: Swift-XRT refined Analysis
  35. GRB 141020A: 1.4 GHZ observation
  36. GRB 141020B: MAXI/GSC detection
  37. Konus-Wind observation of GRB 141017A
  38. GRB 141020A: Swift detection of a burst with an optical counterpart
  39. GRB 141017A: Swift-XRT refined Analysis
  40. GRB 141015A: Super-LOTIS early observations
  41. Konus-Wind observation of GRB 141011A
  42. IPN Triangulation of GRB 141011A (short/hard)
  43. GRB 141005A: iTelescope.Net T21 Optical Observation
  44. GRB 141004A: Fermi GBM observation
  45. Konus-Wind observation of GRB 141005A
  46. GRB 141004A: Swift-BAT refined analysis
  47. GRB 141005A: P60 probable afterglow deteaction
  48. GRB 141004A: Swift detection of a burst with an optical counterpart
  49. Swift observations of HD 305560
  50. GRB 140930B: MASTER early possible OT detection
  51. GRB 140930A/MAXI J2259+524: MASTER optical observations
  52. Konus-Wind observation of GRB 140930B
  53. GRB 140930B: Swift-XRT refined Analysis
  54. GRB 140930B: Swift detection of a short burst
  55. Konus-Wind observation of GRB 140928A
  56. GRB 140928A: Swift-XRT observations
  57. GRB 140928A: Fermi-LAT detection
  58. GRB 140927A: Swift-XRT refined Analysis
  59. GRB 140927A: Swift detection of a burst
  60. GRB 140919A: Swift-XRT refined Analysis
  61. GRB 140919A: Swift-XRT observations
  62. GRB 140916A: Swift-XRT refined Analysis
  63. GRB 140916B: iPTF Optical Observations
  64. Konus-Wind observation of GRB 140906C
  65. GRB 140903A: NOT optical and NIR observations
  66. GRB 140903A: FTN observations
  67. GRB 140818B: TShAO optical upper limit
  68. GRB 140903A: Swift-XRT refined Analysis
  69. IPN Triangulation of GRB 140901A (short/hard/very intense)
  70. Konus-Wind observation of GRB 140825A
  71. GRB 140828A: Swift detection of a burst
  72. GRB 140818B: TLS observations
  73. GRB 140824B: Fermi GBM Detection
  74. GRB 140821A: Fermi GBM Detection
  75. Fermi TRIGGER_NUM 430583595: MASTER OT 20 hours later
  76. GRB 140824A: Swift-XRT refined Analysis
  77. GRB 140824A: Swift detection of a burst
  78. GRB 140817A: Khureltogot optical upper limit
  79. GRB140819A: Deep GROND Upper Limits
  80. Fermi trigg_num 430148973: OSN I-band observations
  81. Konus-Wind observation of GRB 140818A
  82. GRB 140818B: OSN I-band afterglow candidate
  83. GRB 140818B: Swift detection of a burst
  84. Konus-Wind observation of GRB 140817A
  85. GRB 140817A: Swift-XRT refined Analysis
  86. GRB 140817A: Swift-BAT refined analysis
  87. GRB 140815A: A long GRB detected by INTEGRAL
  88. GRB 140814A: Swift-XRT and UVOT observations
  89. GRB 140814A: MAXI/GSC detection
  90. Konus-Wind observation of GRB 140810A
  91. GRB140810A: Fermi-LAT detection
  92. GRB 140809A : Virtual Telescope optical observations
  93. Konus-Wind observation of GRB 140808A
  94. Konus-Wind observation of GRB 140801A
  95. Konus-Wind observation of GRB 140729A
  96. GRB 140730A: Swift-XRT refined Analysis
  97. GRB 140730A: Swift detection of a burst
  98. Radio upper limit on the GRB 140713A with the GMRT
  99. Correction to Fermi-LAT GCN Circular 16633
  100. GRB 140729A: Fermi-LAT detection

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