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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"

15271 results found.

  1. GRB 131224A: A short GRB detected by INTEGRAL
  2. GRB 131218A: a long GRB detected with INTEGRAL
  3. GRB 131216A: Fermi-LAT detection of a burst
  4. GRB 131209A: Swift XRT and UVOT observations
  5. GRB 131209A: Fermi GBM observation
  6. GRB 131209A Tiled Swift observations
  7. Konus-Wind observation of GRB 131209A
  8. GRB 131209A: Fermi-LAT detection of a burst
  9. GRB131202A : GROND observations
  10. GRB 131127B: archival confirmation of iPTF13ecv as a CV
  11. GRB 131127B: rejection of optical counterpart candidates
  12. GRB 131126A: Fermi GBM observation
  13. GRB 131202A: Fermi GBM Detection
  14. GRB 131202A: Tautenburg observations
  15. GRB 131122A: Swift-XRT Further Observation
  16. GRB 131127A: RATIR Rejection of High-z Candidate
  17. GRB 131128A; Fermi GBM observation
  18. Konus-Wind observation of GRB 131126A
  19. Konus-Wind observation of GRB 131125A
  20. GRB 131127A: CQUEAN riz Observation
  21. GRB 131128A: T100 observations
  22. GRB 131127B: MASTER-Net optical observations
  23. GRB 131127B: Nanshan optical observations
  24. Konus-Wind observation of GRB 131127B
  25. IPN Triangulation of GRB 131127B
  26. GRB 131127A: RATIR Optical and NIR Observations, High-z Candidate
  27. GRB 131122A: a long GRB detected with INTEGRAL
  28. Konus-Wind observation of GRB 131118A
  29. GRB 131118A: Fermi GBM detection
  30. GRB 131117A: Skynet PROMPT optical detection of an afterglow
  31. GRB 130925A: HST imaging
  32. GRB 131031A: Mondy optical observations
  33. GRB 131108A: ISON Blagoveshensk upper limit
  34. GRB 131108A: optical observations
  35. GRB 131108A: Continued RATIR Optical and NIR Observations
  36. GRB 131030A: MITSuME Akeno Optical observation
  37. Konus-Wind observation of GRB 131108A
  38. GRB 131108A: AGILE/GRID observation
  39. GRB 131108A: TAROT-Calern optical observation
  40. GRB 131108A: Fermi-LAT refined analysis
  41. GRB 131108A: NOT optical observations
  42. GRB 131108A Tiled Swift observations
  43. GRB 131108A: Fermi-LAT onboard detection of a burst
  44. GRB 131030A: RATIR Optical and NIR Upper Limits
  45. GRB 131030A: Continued RATIR Optical and NIR Observations
  46. GRB 131031A: Swift-XRT afterglow confirmation
  47. GRB 131029A: Suzaku WAM observation of the prompt emission
  48. GRB 131024B: Suzaku WAM observation of the prompt emission
  49. Konus-Wind observation of GRB 131105A
  50. GRB 131103A: NOT and VLT observations
  51. GRB 131030A: Continued RATIR Optical and NIR Observations
  52. GRB 131018B: RATIR Optical/NIR Observations
  53. GRB 131030A: Continued RATIR Optical and NIR Observations
  54. GRB 131031A: Swift/UVOT Upper Limits
  55. GRB 131018B: Further Swift-XRT observations.
  56. GRB 131030A - RoboPol optical afterglow polarimetry
  57. Konus-Wind observation of GRB 131031A
  58. GRB 131030A: P60 observations
  59. GRB 131030A: RATIR Optical and NIR Observations
  60. GRB 131024C: ICSP discovery of a burst in X-rays by balloon borne study
  61. Konus-Wind observation of GRB 131030A
  62. GRB 131029A: Nanshan optical observations
  63. GRB 131029A Tiled Swift observations
  64. GRB 131029A: Fermi-LAT detection of a burst
  65. Konus-Wind observation of GRB 131028A
  66. Swift-BAT Trigger 575905 is probably not a real source
  67. GRB 131024B: Fermi GBM observation
  68. Konus-Wind observation of GRB 131011B
  69. IPN Triangulation of GRB 131014A
  70. GRB 131018B: Fermi GBM observation
  71. GRB 131018B: Fermi-LAT detection of a burst
  72. GRB 131014A: Suzaku WAM observation of the prompt emission
  73. GRB 131014A: GROND observations
  74. GRB 131014A: RATIR Optical/NIR Afterglow Confirmation
  75. Fermi 403206457 / GRB 131011A: AAO optical observations
  76. GRB 131014A: RATIR Optical and NIR Observations
  77. GRB 131014A: Enhanced XRT position
  78. Konus-Wind observation of GRB 131014A
  79. GRB 131014A: Nanshan optical observations
  80. GRB 131014A: Swift detection of a possible X-ray afterglow
  81. GRB 131014A Tiled Swift observations
  82. GRB 131014A: Fermi-LAT detection
  83. GRB 131014A: Fermi GBM detection
  84. GRB 131011A: GROND afterglow observations
  85. GRB 130925A: Possible signatures of binary nature in the afterglow - Request for observations
  86. GRB 130831A: Continued RATIR Optical and NIR Observations
  87. GRB 131004A: MOSFIRE NIR imaging
  88. GRB 131004A: Skynet PROMPT/DSO-14 upper limits
  89. GRB 131004A: RATIR Optical and NIR Upper Limits
  90. GRB131004A: TNG Redshift confirmation
  91. GRB 131004A: TNG optical afterglow confirmation
  92. GRB 131002A, Swift-BAT refined analysis
  93. GRB 131002A: Swift/UVOT Detection
  94. GRB 131002A: Swift detection of a burst
  95. GRB 130925A: continuing Swift/XRT monitoring
  96. Fermi LAT Upper Limits on GRB 130925A
  97. GRB 130925A: Continued RATIR Optical and NIR Observations
  98. GRB 130925A: Fermi GBM Detection
  99. Konus-Wind observation of GRB 130925A
  100. Observation of possible GRB/TDE 130925A by INTEGRAL/SPI-ACS: three activity episodes

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