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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"

32552 results found.

  1. GRB 090305: Swift/UVOT Upper Limits
  2. GRB 090305: Swift-XRT refined analysis
  3. GRB 090305, Swift-BAT refined analysis
  4. GRB 090227A: Suzaku WAM observation of the prompt emission
  5. GRB 090305: Magellan confirmation of the optical afterglow
  6. GRB090305: GMOS-S Candidate Optical Afterglow
  7. GRB 090301A: Suzaku WAM observation of the prompt emission
  8. Konus-RF catches first GRB and SGR bursts
  9. Konus-Wind observation of bright short GRB 090227B
  10. IPN localization of short bright GRB 090227B
  11. Konus-Wind observation of GRB 090301A
  12. GRB 090301A: Swift-BAT refined analysis
  13. SGR J1550-5418
  14. GRB 081211B: Nearby cluster
  15. GRB 090217: Suzaku WAM observation of the prompt emission
  16. GRB090217: XRT analysis
  17. Konus-Wind observation of GRB 090217
  18. IPN localization of GRB 090217
  19. GRB090217: Fermi-LAT Detection
  20. SGR activity seen by BAT during ICSP Ionospheric Events
  21. Detailed lightcurves of ICSP VLF Observation of SGR/AXP 1E1547.0-5408
  22. VLA radio upper limit on GRB 090205
  23. GRB 090205: VLT optical decay
  24. GRB 090205: Swift/UVOT Upper Limits
  25. GRB 090205: VLT refined redshift
  26. GRB 090205: Swift-XRT refined analysis
  27. GRB 090205: VLT spectroscopic redshift
  28. GRB 090205: GROND observations and photometric redshift estimate
  29. GRB 090205: VLT candidate afterglow
  30. GRB 090205: Swift-BAT refined analysis
  31. GRB 080319B: IceCube upper limit on high-energy neutrino flux
  32. GRB 090131: Suzaku WAM observation of the prompt emission
  33. ICSP VLF observation of the signatures of SGR/AXP 1E1547.0-5408 bursts
  34. GRB 090126A: Swift-XRT afterglow confirmation
  35. Konus-Wind observation of GRB 090201
  36. GRB 090201: Swift-XRT refined analysis
  37. GRB090201: Swift UVOT upper limits
  38. GRB 090201: object inside the enhanced XRT error circle
  39. GRB 090201: VLT NIR observations
  40. GRB 090201: Swift-BAT refined analysis
  41. GRB 090201: VLT afterglow candidate
  42. GRB 090201: Swift-XRT detection of the possible X-ray afterglow
  43. GRB090113: MAGIC telescope GeV observation
  44. GRB 090201: ROTSE-III Optical Limits
  45. GRB 090126A: Swift/UVOT Upper Limits
  46. Konus-Wind observation of bright burst from AXP/SGR 1E1547.0-5408 on January 29
  47. GRB 090129: Swift-BAT refined analysis
  48. Suzaku ToO Observation of AXP 1E 1547.0-5408
  49. Konus-Wind observation of AXP/SGR 1E1547.0-5408 bursting activity
  50. AXP 1E1547.0-5408: RHESSI observations up to 400 keV
  51. GRB 090102: HST observations and host galaxy
  52. GRB 090126A: Swift-XRT Refined Analysis
  53. GRB 090118: no afterglow candidate
  54. GRB 090123: GROND detection
  55. 1E1547.0-5408: Swift detection of dust halo
  56. GRB 090123: Swift XRT refined analysis
  57. GRB 090123: Swift/UVOT Observations
  58. AXP 1E1547.0-5408: Suzaku WAM detections of the current activity
  59. GRB 090123: Swift-BAT refined analysis
  60. AXP 1E1547.0-5408: long bursts with INTEGRAL SPI-ACS
  61. GRB 090118: Swift XRT Observations - Confirmation of an Afterglow
  62. AXP 1E1547.0-5408: Fermi GBM detection of additional bursts
  63. AXP 1E1547.0-5408: INTEGRAL SPI-ACS confirms activity increase
  64. AXP 1E1547.0-5408: Fermi GBM observations
  65. Trigger 340734: Swift detection of a possible short burst
  66. GRB 090118: Subaru NIR Observation
  67. GRB 090118: KPNO 4m 2nd Epoch Observations
  68. GRB 090118 (BATSS): GRT Optical Observation
  69. GRB 090118: KPNO 4m Detection of Candidate Afterglow
  70. GRB 090118: Swift-XRT observations
  71. GRB090118 Swift/UVOT upper limits
  72. GRB 090118: GROND Upper Limits
  73. GRB 090117: confirmation of the X-ray afterglow
  74. GRB 090117 - Fermi GBM Observations
  75. GRB 090117: GROND Upper Limits
  76. GRB090117 Swift/UVOT upper limits
  77. GRB 090112B: Suzaku WAM observation of the prompt emission
  78. GRB 090113: LOAO Detection Limits in R, I, z, Y-band
  79. GRB 090113: Swift UVOT upper limits
  80. GRB 090113: GROND Upper Limits
  81. GRB 090113: Swift-XRT refined analysis
  82. GRB 090113: Observations from NOT
  83. GRB 090113: Swift-BAT refined analysis
  84. GRB 090113: ROTSE-III Optical Limits
  85. GRB090113: XRT position
  86. GRB 090111, Swift-BAT refined analysis
  87. GRB 090111: Swift UVOT Upper Limits
  88. GRB 090111: Swift-XRT refined analysis
  89. GRB 090107B: Suzaku WAM observation of the prompt emission
  90. GRB090107B: Fermi GBM Detection
  91. GRB 090102: WSRT Radio Observations
  92. GRB 090107B: Swift XRT afterglow confirmation
  93. GRB 090107B: Swift/UVOT Observations
  94. GRB 090107B: Swift-XRT detection of possible afterglow
  95. GRB 090107B optical observations
  96. GRB 090107B: ROTSE-III Optical Limits
  97. Fermi/GBM detection of GRB 081226A
  98. GRB 090107: Swift-BAT refined analysis
  99. GRB 090102: optical decay
  100. VLA radio upper limit on GRB 090102

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