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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"

21925 results found.

  1. GRB 140206A: Swift/UVOT Detection
  2. GRB 140206A: theoretical prediction of redshift and of supernova occurrence
  3. GRB 140206A: Enhanced Swift-XRT position
  4. GRB 140206A: Nanshan optical observations
  5. GRB 140206A: Swift detection of a burst
  6. GRB 140129A: 5 GHz VLA observations
  7. GRB 140129A: Continued RATIR Optical and NIR Observations
  8. GRB 140129A: Khureltogot optical limit
  9. GRB 140129B: Swift/UVOT Detection
  10. GRB 140129A: Continued RATIR Optical and NIR Observations
  11. GRB 140102A: MITSuME Akeno Optical observation
  12. GRB 140129B: MASTER OT early light curve
  13. GRB140129A: RAPTOR Observations of the Early Afterglow
  14. GRB 140129A: MITSuME Okayama upper limits
  15. GRB 140129B: Enhanced Swift-XRT position
  16. GRB 140129A: Swift/UVOT Observations
  17. GRB 140129B: Swift detection of a burst with an optical afterglow
  18. GRB 140129A: Enhanced Swift-XRT position
  19. GRB 140129A: RATIR Optical and NIR Observations
  20. GRB 140129A: Swift detection of a burst with an optical afterglow
  21. GRB 140122A/Fermi412093190: MASTER-Net early optical observations
  22. GRB 140114A: optical upper limit
  23. Correction: MAXI J1421-613: Skynet PROMPT/R-COP observations
  24. Konus-Wind observation of GRB 131215A
  25. GRB 140118A/MAXI J1421-613: Skynet PROMPT/R-COP observations
  26. GRB 140118A: RATIR Optical and NIR Observations
  27. Swift Trigger 584155 is MAXI J1421-613
  28. GRB 140110A: Further Swift-XRT Observation
  29. GRB 140103A: MASTER-Net early OT detection
  30. GRB 140103A: optical upper limit
  31. GRB 140114A: NOT afterglow observations
  32. GRB 140114A: Continued RATIR Optical and NIR Observations
  33. GRB 140114A: MITSuME Okayama upper limits
  34. GRB 140114A: ROTSE-III Optical Limits
  35. GRB 140114A: Swift/UVOT Upper Limits
  36. GRB 140114A: KAIT Optical Upper Limit
  37. GRB 140103A: AAO optical afterglow candidate
  38. GRB 140104B: Further Swift XRT observations
  39. GRB 140114A: Enhanced Swift-XRT position
  40. GRB 140114A: RATIR Optical and NIR Afterglow Detection
  41. GRB 140102A: AAO optical upper limits
  42. GRB 140114A: Swift detection of a burst
  43. GRB 140108A: Konkoly optical observations
  44. IPN Triangulation of GRB 140110A
  45. GRB 140110A: Swift/UVOT Observations
  46. GRB 140108A: Suzaku WAM observation of the prompt emission
  47. GRB 140104B: Suzaku WAM observation of the prompt emission
  48. GRB 140110A: Swift XRT observations
  49. GRB 140110A: Fermi-LAT detection of a burst
  50. GRB 140108A: Mondy optical upper limit
  51. GRB 140105A: MASTER-Net early optical observations and time correction
  52. GRB 131231A: AAO optical observations
  53. GRB 140108A: Swift/UVOT Detection
  54. GRB 140108A: theoretical prediction of redshift and of supernova occurrence
  55. GRB 140108A: Enhanced Swift-XRT position
  56. GRB 140108A: Mondy optical observations
  57. GRB 140108A: D50+BART optical candidate detection
  58. GRB 140108A: 1.23m CAHA observations
  59. GRB 140108A: MASTER-Net OT detection
  60. GRB 140108A: Swift detection of a burst
  61. GRB 140105A: HCT Observations
  62. Swift-BAT triggered on KS 1947+300
  63. GRB 140105A: Swift XRT observations
  64. GRB 140105A/Fermi410578384: MASTER-Net early optical observations
  65. GRB 140104B: Swift XRT observations
  66. GRB 140102A: Swift/UVOT Detection
  67. LOAO R-band Observation of GRB 140102A
  68. GRB 140104B: Fermi GBM observation
  69. GRB 131209A: Further Swift XRT observations
  70. GRB 140103A: Lulin Optical r-band Observations
  71. GRB 140102A, Optical Observations
  72. GRB 140103A: P60 Observations
  73. GRB 140102A: P60 observations
  74. GRB 131231A: Swift/UVOT Observations of the Optical Afterglow
  75. GRB 140103A: Swift/UVOT Upper Limits
  76. Konus-Wind observation of GRB 131231A
  77. GRB 140102A: Fermi/GBM Observation
  78. GRB 131229A: Suzaku WAM observation of the prompt emission
  79. Konus-Wind observation of GRB 140102A
  80. GRB 140102A: GROND observations
  81. GRB 140102A, Swift-BAT refined analysis
  82. GRB 140103A: MASTER-Net optical observations
  83. GRB 140102A: Fermi-LAT detection of a burst
  84. GRB 140102A: Enhanced Swift-XRT position
  85. GRB 140103A: Swift detection of a burst
  86. GRB 140102A: Early optical observations from Nanshan
  87. GRB 131224B detected in ground analysis of Swift-BAT data
  88. GRB 140102A: Swift detection of a burst with optical counterpart
  89. GRB 131231A: P60 observations
  90. GRB 131231A: MDM afterglow observation
  91. GRB 131231A: Nanshan afterglow candidate
  92. GRB 131231A: Fermi-LAT detection of a burst
  93. Konus-Wind observation of GRB 131229A
  94. GRB 131229A: Magellan upper limit
  95. GRB 131229A: GROND observations
  96. GRB 131229A: Swift/UVOT Upper Limits
  97. GRB 131227A: GROND Upper Limits
  98. GRB 131229A: Enhanced Swift-XRT position
  99. GRB 131229A: Deep Gemini-South Imaging
  100. GRB 131229A: Swift detection of a burst

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