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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"

26358 results found.

  1. GRB090310: Fermi GBM detection
  2. GRB 090205: Zadko Telescope late-time observations
  3. GRB 090307A: TAROT Calern observatory optical observations
  4. GRB090305B: Fermi GBM detection
  5. GRB 090309B: Fermi GBM detection
  6. GRB 090309: Swift-XRT refined analysis
  7. GRB 090309: Enhanced Swift-XRT position
  8. GRB 090306B: INTEGRAL SPI-ACS light curve
  9. GRB 090309, Swift-BAT refined analysis
  10. GRB 090308: GROND observations
  11. GRB 090308: Gemini GMOS Observations
  12. GRB 090309: Swift detection of a burst
  13. GRB 090308B: Fermi GBM detection
  14. GRB 090307B: Fermi GBM detection
  15. GRB 090306C: Fermi GBM detection
  16. GRB 090307: GROND Upper Limits
  17. GRB 090306B: GROND Upper Limits
  18. GRB 090305C: Suzaku WAM observation of the prompt emission
  19. GRB 090308: Swift-XRT refined analysis
  20. Radio observation of GRB 090201 with ATCA
  21. Radio observation of GRB 090117 with ATCA
  22. Radio observation of GRB 081226b with ATCA
  23. Radio observation of GRB 081226a with ATCA
  24. Radio observation of GRB 081007 with ATCA
  25. ATCA observation of SGR J1550-5418
  26. GRB 090308: Swift-BAT refined analysis
  27. GRB 090308: Swift detection of a burst
  28. GRB 090307: Swift-XRT afterglow confirmation and analysis
  29. GRB 090307: Swift-BAT refined analysis of trigger 345551
  30. GRB 090306B: Burst detection from Swift-BAT slew data
  31. Swift Trigger 345551 is probably not a GRB
  32. Fermi GBM trigger 090305784 is not a GRB
  33. GRB 090306: Swift detection of a possible burst
  34. GRB 090305: Swift/UVOT Upper Limits
  35. GRB 090305: Swift-XRT refined analysis
  36. GRB 090305, Swift-BAT refined analysis
  37. GRB 090227A: Suzaku WAM observation of the prompt emission
  38. GRB 090305: Magellan confirmation of the optical afterglow
  39. GRB090305: GMOS-S Candidate Optical Afterglow
  40. GRB 090305: Swift detection of a short burst
  41. GRB 090304: Fermi GBM detection
  42. GRB 090301A: Suzaku WAM observation of the prompt emission
  43. Konus-RF catches first GRB and SGR bursts
  44. GRB 090228B: Fermi GBM detection
  45. Konus-Wind observation of bright short GRB 090227B
  46. IPN localization of short bright GRB 090227B
  47. Konus-Wind observation of GRB 090301A
  48. GRB 090301A: Swift-BAT refined analysis
  49. GRB 090301B: Fermi GBM detection
  50. GRB 090227B: Fermi GBM detection
  51. GRB 090301: Swift detection of a burst
  52. GRB 090228: Fermi GBM detection
  53. GRB 090227: Fermi GBM detection
  54. GRB 090206: Fermi GBM detection
  55. SGR J1550-5418
  56. GRB 081211B: Nearby cluster
  57. Ongoing activity of AXP/SGR 1E1547.0-5408
  58. GRB 090222: Fermi GBM detection
  59. GRB 090219: Fermi GBM detection
  60. GRB 090217: Suzaku WAM observation of the prompt emission
  61. GRB090217: XRT analysis
  62. Konus-Wind observation of GRB 090217
  63. IPN localization of GRB 090217
  64. GRB090217: Fermi-LAT Detection
  65. GRB 090217: Fermi GBM detection
  66. SGR activity seen by BAT during ICSP Ionospheric Events
  67. Detailed lightcurves of ICSP VLF Observation of SGR/AXP 1E1547.0-5408
  68. GRB 090207 - Fermi GBM Observations
  69. GRB 090129: Fermi GBM detection
  70. VLA radio upper limit on GRB 090205
  71. GRB 090205: VLT optical decay
  72. GRB 090205: Swift/UVOT Upper Limits
  73. GRB 090205: Swift-XRT refined analysis
  74. GRB 090205: Swift burst of interest
  75. GRB 090205: VLT spectroscopic redshift
  76. GRB 090205: GROND observations and photometric redshift estimate
  77. GRB 090205: Swift-BAT refined analysis
  78. GRB 090205: Enhanced Swift-XRT position
  79. GRB 090205: Swift detection of a burst
  80. GRB 090131: Suzaku WAM observation of the prompt emission
  81. ICSP VLF observation of the signatures of SGR/AXP 1E1547.0-5408 bursts
  82. GRB 090126A: Swift-XRT afterglow confirmation
  83. Konus-Wind observation of GRB 090201
  84. GRB 090202: Fermi GBM detection
  85. GRB 090131: Fermi GBM detection
  86. GRB 090201: Swift-XRT refined analysis
  87. GRB 090201: Enhanced Swift-XRT position
  88. GRB 090201: VLT NIR observations
  89. GRB 090201: Swift-BAT refined analysis
  90. GRB 090201: Swift detection of a burst
  91. Konus-Wind observation of bright burst from AXP/SGR 1E1547.0-5408 on January 29
  92. GRB 090129: Swift-BAT refined analysis
  93. GRB 090129: Swift detection of a burst
  94. Konus-Wind observation of AXP/SGR 1E1547.0-5408 bursting activity
  95. AXP 1E1547.0-5408: RHESSI observations up to 400 keV
  96. GRB 090126A: Swift-XRT Refined Analysis
  97. GRB 090126B: Fermi GBM detection
  98. Konus-Wind detection of very bright SGR-like burst on January 25, 2009
  99. GRB 090118: no afterglow candidate
  100. GRB 090123: GROND detection

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