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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"

32722 results found.

  1. GRB 080319B: IceCube upper limit on high-energy neutrino flux
  2. GRB 090131: Suzaku WAM observation of the prompt emission
  3. ICSP VLF observation of the signatures of SGR/AXP 1E1547.0-5408 bursts
  4. GRB 090126A: Swift-XRT afterglow confirmation
  5. Konus-Wind observation of GRB 090201
  6. GRB 090201: Swift-XRT refined analysis
  7. GRB090201: Swift UVOT upper limits
  8. GRB 090201: object inside the enhanced XRT error circle
  9. GRB 090201: VLT NIR observations
  10. GRB 090201: Swift-BAT refined analysis
  11. GRB 090201: VLT afterglow candidate
  12. GRB 090201: Swift-XRT detection of the possible X-ray afterglow
  13. GRB090113: MAGIC telescope GeV observation
  14. GRB 090201: ROTSE-III Optical Limits
  15. GRB 090126A: Swift/UVOT Upper Limits
  16. Konus-Wind observation of bright burst from AXP/SGR 1E1547.0-5408 on January 29
  17. GRB 090129: Swift-BAT refined analysis
  18. Suzaku ToO Observation of AXP 1E 1547.0-5408
  19. Konus-Wind observation of AXP/SGR 1E1547.0-5408 bursting activity
  20. AXP 1E1547.0-5408: RHESSI observations up to 400 keV
  21. GRB 090102: HST observations and host galaxy
  22. GRB 090126A: Swift-XRT Refined Analysis
  23. GRB 090118: no afterglow candidate
  24. GRB 090123: GROND detection
  25. 1E1547.0-5408: Swift detection of dust halo
  26. GRB 090123: Swift XRT refined analysis
  27. GRB 090123: Swift/UVOT Observations
  28. AXP 1E1547.0-5408: Suzaku WAM detections of the current activity
  29. GRB 090123: Swift-BAT refined analysis
  30. AXP 1E1547.0-5408: long bursts with INTEGRAL SPI-ACS
  31. GRB 090118: Swift XRT Observations - Confirmation of an Afterglow
  32. AXP 1E1547.0-5408: Fermi GBM detection of additional bursts
  33. AXP 1E1547.0-5408: INTEGRAL SPI-ACS confirms activity increase
  34. AXP 1E1547.0-5408: Fermi GBM observations
  35. Trigger 340734: Swift detection of a possible short burst
  36. GRB 090118: Subaru NIR Observation
  37. GRB 090118: KPNO 4m 2nd Epoch Observations
  38. GRB 090118 (BATSS): GRT Optical Observation
  39. GRB 090118: KPNO 4m Detection of Candidate Afterglow
  40. GRB 090118: Swift-XRT observations
  41. GRB090118 Swift/UVOT upper limits
  42. GRB 090118: GROND Upper Limits
  43. GRB 090117: confirmation of the X-ray afterglow
  44. GRB 090117 - Fermi GBM Observations
  45. GRB 090117: GROND Upper Limits
  46. GRB090117 Swift/UVOT upper limits
  47. GRB 090112B: Suzaku WAM observation of the prompt emission
  48. GRB 090113: LOAO Detection Limits in R, I, z, Y-band
  49. GRB 090113: Swift UVOT upper limits
  50. GRB 090113: GROND Upper Limits
  51. GRB 090113: Swift-XRT refined analysis
  52. GRB 090113: Observations from NOT
  53. GRB 090113: Swift-BAT refined analysis
  54. GRB 090113: ROTSE-III Optical Limits
  55. GRB090113: XRT position
  56. GRB 090111, Swift-BAT refined analysis
  57. GRB 090111: Swift UVOT Upper Limits
  58. GRB 090111: Swift-XRT refined analysis
  59. GRB 090107B: Suzaku WAM observation of the prompt emission
  60. GRB090107B: Fermi GBM Detection
  61. GRB 090102: WSRT Radio Observations
  62. GRB 090107B: Swift XRT afterglow confirmation
  63. GRB 090107B: Swift/UVOT Observations
  64. GRB 090107B: Swift-XRT detection of possible afterglow
  65. GRB 090107B optical observations
  66. GRB 090107B: ROTSE-III Optical Limits
  67. Fermi/GBM detection of GRB 081226A
  68. GRB 090107: Swift-BAT refined analysis
  69. GRB 090102: optical decay
  70. VLA radio upper limit on GRB 090102
  71. GRB 090102: GRT Optical Observation
  72. Konus-Wind observation of GRB 090102
  73. GRB 090102: Hobby-Eberly Telescope Spectroscopy
  74. GRB 090102: P60 Imaging and P200 Spectroscopy
  75. GRB 090102 Observations from IAC80
  76. GRB 090102: GROND observations of the optical afterglow
  77. Swift UVOT observations of GRB 090102
  78. GRB 090102: Swift-BAT refined analysis
  79. GRB 090102: Swift XRT refined analysis
  80. GRB 090102: NOT redshift
  81. GRB 090102: TAROT Calern observatory optical light curve
  82. GRB 090102: REM observations of a bright afterglow
  83. GRB 081230: GROND confirmation of the afterglow
  84. GRB 081230, Swift-BAT refined analysis
  85. GRB081230: Swift-XRT refined analysis
  86. GRB 081230 Swift/UVOT Observations
  87. GRB 081230: Swift/UVOT Detection of an Optical Afterglow
  88. GRB 081230: ROTSE-III Detection of Optical Counterpart
  89. GRB 081228: GROND confirmation of the optical/NIR afterglow
  90. GRB 081226B: Fermi GBM observation
  91. GRB 081228, Swift-BAT refined analysis
  92. VLA radio detection of GRB 081221
  93. GRB 081228: Swift/UVOT Upper Limits
  94. GRB 081228: Swift-XRT Team refined analysis
  95. GRB 081228: detection by GROND
  96. VLA radio observation of GRB 081221
  97. GRB 081226B: Swift XRT and UVOT upper limits
  98. GRB 081224: Suzaku WAM observation of the prompt emission
  99. GRB 081226: Swift-XRT refined analysis
  100. GRB 081226A: Swift UVOT Upper Limits

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