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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"

32766 results found.

  1. GRB 090306B: GROND Upper Limits
  2. GRB 090305C: Suzaku WAM observation of the prompt emission
  3. GRB 090308: Swift-XRT refined analysis
  4. Radio observation of GRB 090201 with ATCA
  5. Radio observation of GRB 090117 with ATCA
  6. Radio observation of GRB 081226b with ATCA
  7. Radio observation of GRB 081226a with ATCA
  8. Radio observation of GRB 081007 with ATCA
  9. ATCA observation of SGR J1550-5418
  10. GRB 090308: Swift-BAT refined analysis
  11. GRB 090306B: Possible XRT afterglow
  12. GRB 090307: Swift-XRT afterglow confirmation and analysis
  13. GRB 090307: Swift-BAT refined analysis of trigger 345551
  14. Swift Trigger 345551 is probably not a GRB
  15. GRB 090305: Swift/UVOT Upper Limits
  16. GRB 090305: Swift-XRT refined analysis
  17. GRB 090305, Swift-BAT refined analysis
  18. GRB 090227A: Suzaku WAM observation of the prompt emission
  19. GRB 090305: Magellan confirmation of the optical afterglow
  20. GRB090305: GMOS-S Candidate Optical Afterglow
  21. GRB 090301A: Suzaku WAM observation of the prompt emission
  22. Konus-RF catches first GRB and SGR bursts
  23. Konus-Wind observation of bright short GRB 090227B
  24. IPN localization of short bright GRB 090227B
  25. Konus-Wind observation of GRB 090301A
  26. GRB 090301A: Swift-BAT refined analysis
  27. SGR J1550-5418
  28. GRB 081211B: Nearby cluster
  29. GRB 090217: Suzaku WAM observation of the prompt emission
  30. GRB090217: XRT analysis
  31. Konus-Wind observation of GRB 090217
  32. IPN localization of GRB 090217
  33. GRB090217: Fermi-LAT Detection
  34. SGR activity seen by BAT during ICSP Ionospheric Events
  35. Detailed lightcurves of ICSP VLF Observation of SGR/AXP 1E1547.0-5408
  36. VLA radio upper limit on GRB 090205
  37. GRB 090205: VLT optical decay
  38. GRB 090205: Swift/UVOT Upper Limits
  39. GRB 090205: VLT refined redshift
  40. GRB 090205: Swift-XRT refined analysis
  41. GRB 090205: VLT spectroscopic redshift
  42. GRB 090205: GROND observations and photometric redshift estimate
  43. GRB 090205: VLT candidate afterglow
  44. GRB 090205: Swift-BAT refined analysis
  45. GRB 080319B: IceCube upper limit on high-energy neutrino flux
  46. GRB 090131: Suzaku WAM observation of the prompt emission
  47. ICSP VLF observation of the signatures of SGR/AXP 1E1547.0-5408 bursts
  48. GRB 090126A: Swift-XRT afterglow confirmation
  49. Konus-Wind observation of GRB 090201
  50. GRB 090201: Swift-XRT refined analysis
  51. GRB090201: Swift UVOT upper limits
  52. GRB 090201: object inside the enhanced XRT error circle
  53. GRB 090201: VLT NIR observations
  54. GRB 090201: Swift-BAT refined analysis
  55. GRB 090201: VLT afterglow candidate
  56. GRB 090201: Swift-XRT detection of the possible X-ray afterglow
  57. GRB090113: MAGIC telescope GeV observation
  58. GRB 090201: ROTSE-III Optical Limits
  59. GRB 090126A: Swift/UVOT Upper Limits
  60. Konus-Wind observation of bright burst from AXP/SGR 1E1547.0-5408 on January 29
  61. GRB 090129: Swift-BAT refined analysis
  62. Suzaku ToO Observation of AXP 1E 1547.0-5408
  63. Konus-Wind observation of AXP/SGR 1E1547.0-5408 bursting activity
  64. AXP 1E1547.0-5408: RHESSI observations up to 400 keV
  65. GRB 090102: HST observations and host galaxy
  66. GRB 090126A: Swift-XRT Refined Analysis
  67. GRB 090118: no afterglow candidate
  68. GRB 090123: GROND detection
  69. 1E1547.0-5408: Swift detection of dust halo
  70. GRB 090123: Swift XRT refined analysis
  71. GRB 090123: Swift/UVOT Observations
  72. AXP 1E1547.0-5408: Suzaku WAM detections of the current activity
  73. GRB 090123: Swift-BAT refined analysis
  74. AXP 1E1547.0-5408: long bursts with INTEGRAL SPI-ACS
  75. GRB 090118: Swift XRT Observations - Confirmation of an Afterglow
  76. AXP 1E1547.0-5408: Fermi GBM detection of additional bursts
  77. AXP 1E1547.0-5408: INTEGRAL SPI-ACS confirms activity increase
  78. AXP 1E1547.0-5408: Fermi GBM observations
  79. Trigger 340734: Swift detection of a possible short burst
  80. GRB 090118: Subaru NIR Observation
  81. GRB 090118: KPNO 4m 2nd Epoch Observations
  82. GRB 090118 (BATSS): GRT Optical Observation
  83. GRB 090118: KPNO 4m Detection of Candidate Afterglow
  84. GRB 090118: Swift-XRT observations
  85. GRB090118 Swift/UVOT upper limits
  86. GRB 090118: GROND Upper Limits
  87. GRB 090117: confirmation of the X-ray afterglow
  88. GRB 090117 - Fermi GBM Observations
  89. GRB 090117: GROND Upper Limits
  90. GRB090117 Swift/UVOT upper limits
  91. GRB 090112B: Suzaku WAM observation of the prompt emission
  92. GRB 090113: LOAO Detection Limits in R, I, z, Y-band
  93. GRB 090113: Swift UVOT upper limits
  94. GRB 090113: GROND Upper Limits
  95. GRB 090113: Swift-XRT refined analysis
  96. GRB 090113: Observations from NOT
  97. GRB 090113: Swift-BAT refined analysis
  98. GRB 090113: ROTSE-III Optical Limits
  99. GRB090113: XRT position
  100. GRB 090111, Swift-BAT refined analysis

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