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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"

19701 results found.

  1. IPN Triangulation of GRB 140308A
  2. Konus-Wind observation of GRB 140306A
  3. IPN Triangulation of GRB 140306A
  4. GRB 140304A: Continued RATIR Optical and NIR Observations
  5. Trigger 590503: Swift-BAT triggered on noise
  6. GRB 140304A: RATIR g-band Dropout
  7. GRB 140304A: Enhanced Swift-XRT position
  8. GRB 140304A: Swift/UVOT Upper Limits
  9. GRB 140304A: Khureltogot optical observations
  10. GRB 140304A: Mondy optical observations
  11. GRB 140304A: Afterglow decay from Nanshan observations
  12. GRB 140304A: Swift detection of a burst
  13. GRB 140301A: Swift/UVOT Upper Limits
  14. GRB 140302A: Swift/UVOT Upper Limits
  15. GRB 140302A: MITSuME Okayama upper limits
  16. GRB 140302A: Enhanced Swift-XRT position
  17. GRB 140301A: GROND Detection of the Optical/NIR Afterglow
  18. GRB 140302A: GROND afterglow candidate
  19. GRB 140302A: Swift detection of a burst
  20. GRB 140301A: NOT afterglow candidate
  21. GRB 140301A: Enhanced Swift-XRT position
  22. GRB 140301A: Skynet R-COP Observations
  23. GRB 140301A: Swift detection of a burst
  24. GRB 140226A/iPTF14yb: 1.23m CAHA observations
  25. GRB 140226A/iPTF14yb: Mondy optical observations
  26. GRB 140226A/iPTF14yb: RATIR Optical and NIR Observations
  27. GRB 140219A: Mondy optical observations of XRT source #5
  28. PTF14yb: GROND Transient Detection
  29. iPTF14yb: RATIR Optical and NIR Observations of the optical transient
  30. GRB 140219A: MAXI/GSC detection
  31. GRB 140219A: MASTER optical brightening inside XRT-5 error box detection
  32. GRB 140102A: TAOS early optical afterglow detection
  33. GRB 140219A: optical observations of XRT source #5
  34. GRB 140221A: Results from Swift XRT tiled observations
  35. GRB 140219A: Xuyi and Nanshan upper limits
  36. GRB 140219A: MASTER before and after GRB observational arguments of the exceptionally Dark GRB
  37. GRB 140219A: Fermi-LAT detection of a burst
  38. Swift follow-up of an Integral weak transient
  39. GRB 140213A: Continued Skynet R-COP/PROMPT Observations of the Optical Afterglow
  40. GRB 140215A: RAPTOR Observations During Gamma-Ray Emitting Interval
  41. GRB 140213A: Continued Skynet R-COP/PROMPT Detections of a Rebrightening Optical Afterglow
  42. GRB 140215A: Continued Skynet PROMPT Observations of the Optical Afterglow
  43. GRB 140211A: Khureltogot optical upper limits
  44. GRB 140215A: Continued RATIR Optical and NIR Observations
  45. Konus-Wind observation of GRB 140213A
  46. GRB 140215A: Swift/UVOT Detection
  47. GRB 140215A: Continued RATIR Optical and NIR Observations
  48. GRB 140215A: MITSuME Okayama Optical Observation
  49. GRB 140215A: ISON-NM optical observations
  50. GRB 140215A: Enhanced Swift-XRT position
  51. GRB 140215A: RATIR Optical and NIR Observations
  52. GRB 140215A: Swift detection of a burst with optical counterpart
  53. GRB 140213A: Swift-BAT refined analysis
  54. GRB140206A: Discovery Channel Telescope Optical Detection
  55. GRB 140213A: Enhanced Swift-XRT position
  56. GRB 140213A: GROND Detection of the Optical/NIR Afterglow
  57. GRB 140213A: Skynet R-COP Detection of Optical Afterglow
  58. GRB 140213A: Swift-XRT observations
  59. Trigger 586482: Swift detection of GROJ1744-28
  60. GRB 140209A: Swift-XRT observations
  61. GRB 140211A: MITSuME Okayama upper limits
  62. GRB 140209A: Early RAPTOR Optical Detection
  63. GRB 140209A: Swift-BAT Spectral lag analysis
  64. GRB 140206A: Bassano Bresciano Observatory optical upper limit
  65. GRB 140209A: Fermi GBM observation
  66. GRB 140209A: optical observations
  67. GRB 140206A: MITSuME Akeno detection of the optical counterpart
  68. GRB 140206A: TNG redshift confirmation
  69. GRB 140206A: Optical Observations via Virtual Telescope
  70. GRB 140206A: NOT redshift
  71. GRB 140206A: TNG optical observations
  72. GRB 140206A: T100 observations
  73. GRB 140206A: Swift/UVOT Detection
  74. GRB 140206A: Enhanced Swift-XRT position
  75. GRB 140206A: Nanshan optical observations
  76. GRB 140206A: Swift detection of a burst
  77. GRB 140129A: 5 GHz VLA observations
  78. GRB 140129A: Continued RATIR Optical and NIR Observations
  79. GRB 140129A: Khureltogot optical limit
  80. GRB 140129B: Swift/UVOT Detection
  81. GRB 140129A: Continued RATIR Optical and NIR Observations
  82. GRB 140102A: MITSuME Akeno Optical observation
  83. GRB 140129B: MASTER OT early light curve
  84. GRB 140129B, Swift-BAT refined analysis (probably not a short burst)
  85. GRB140129A: RAPTOR Observations of the Early Afterglow
  86. GRB 140129A: MITSuME Okayama upper limits
  87. GRB 140129B: Enhanced Swift-XRT position
  88. GRB 140129A: Swift/UVOT Observations
  89. GRB 140129A: Swift-XRT refined Analysis
  90. GRB 140129B: Swift detection of a burst with an optical afterglow
  91. GRB 140129A: Enhanced Swift-XRT position
  92. GRB 140129A: RATIR Optical and NIR Observations
  93. GRB 140129A: Swift detection of a burst with an optical afterglow
  94. GRB 140122A/Fermi412093190: MASTER-Net early optical observations
  95. GRB 140114A: optical upper limit
  96. Correction: MAXI J1421-613: Skynet PROMPT/R-COP observations
  97. GRB 140118A/MAXI J1421-613: Skynet PROMPT/R-COP observations
  98. GRB 140118A: RATIR Optical and NIR Observations
  99. Swift Trigger 584155 is MAXI J1421-613
  100. GRB 140110A: Further Swift-XRT Observation

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