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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"

26691 results found.

  1. GRB 090807: Swift-XRT refined analysis
  2. GRB 090807: Enhanced Swift-XRT position
  3. GRB 090807, RIMOTS optical upper limits
  4. GRB 090807: Swift detection of a burst
  5. GRB 090802B: Fermi GBM detection
  6. IPN Triangulation and Konus-Wind observaions of GRB090727B
  7. GRB 090802: Fermi GBM detection
  8. GRB 090726: optical observation
  9. Swift trigger 358760 is probably a noise event
  10. GRB 090717A: Suzaku WAM observation of the prompt emission
  11. GRB 090709A : Quick look analysis of the Suzaku observation
  12. GRB 090728: Swift-BAT refined analysis
  13. GRB 090727: GRT Optical Observation
  14. GRB 090728: Swift XRT refined analysis
  15. GRB 090726: GRT Optical Observation
  16. GRB 090727: Swift/UVOT Upper Limits
  17. GRB 090728: Swift/UVOT Upper Limits
  18. GRB 090728: Enhanced Swift-XRT position
  19. GRB 090728, RIMOTS optical upper limits
  20. GRB 090728A: Faulkes Telescope North Optical Afterglow Candidate
  21. GRB 090728: Swift detection of a burst
  22. GRB 090727: Swift-XRT refined analysis
  23. GRB 090727: Enhanced Swift-XRT position
  24. GRB 090715B: Late-time Lick 3m observations
  25. GRB 090727: Liverpool Telescope possible OT candidate
  26. GRB 090727: Swift detection of a burst
  27. GRB090726: Swift/UVOT observations
  28. GRB 090726: D50 optical observations
  29. GRB 090711: Fermi GBM detection
  30. GRB 090726: Swift-XRT Team refined analysis
  31. GRB 090726: Enhanced Swift-XRT position
  32. GRB 090726: optical transient candidate
  33. Konus-Wind and Konus-RF observations of GRB 090719
  34. Konus-Wind observations of bright hard GRB 090720B
  35. IPN Triangulation of bright GRB 090720B
  36. GRB 090720B: Fermi GBM detection
  37. Swift XRT and UVOT refned analysis of GRB 090720
  38. GRB 090709A: Swift XRT Timing Analysis
  39. GRB 090715B: VLA radio detection
  40. GRB 090720 Source found in ground processing of Swift-BAT data
  41. GRB 090717B: Fermi GBM detection
  42. GRB 090717: Fermi GBM detection
  43. GRB 090719: Fermi GBM detection
  44. GRB 090718B: Fermi GBM detection
  45. GRB 090718: Fermi GBM detection
  46. GRB 090720: Fermi GBM detection
  47. GRB 090715B: further NOT optical observations
  48. GRB 090715A: Suzaku WAM observation of the prompt emission
  49. GRB 090709A - CARMA mm Observations
  50. GRB 090715A: VLA observations
  51. Konus-Wind observations of short/hard GRB 090715A
  52. Konus-Wind and Konus-RF observations of GRB 090715B
  53. GRB 090715B: Swift/UVOT followup observations
  54. GRB 090715B: Enhanced Swift-XRT position
  55. GRB 090715B: Observation of the optical afterglow
  56. GRB 090715B: Swift XRT Refined Analysis
  57. GRB 090715B: NOT optical observations
  58. GRB 090715B - Liverpool Telescope Optical Afterglow Candidate
  59. GRB 090715B: Swift detection of a burst with a possible optical counterpart
  60. Detection of GRB 090618 by RT-2 Experiment onboard the CORONAS-PHOTON Satellite
  61. GRB 090712: Fermi GBM observation
  62. GRB 090713: Fermi GBM detection
  63. VLA radio observations of GRB 090709A
  64. GRB 090621B: MTM-500 optical observations
  65. GRB 090709A: Suzaku WAM observation of the prompt emission
  66. GRB 090709A: Swift UVOT upper limits
  67. GRB 090709A: WHT LIRIS observations
  68. GRB 090709B: Fermi GBM detection
  69. GRB 090709A: evidence for a very red afterglow at low z
  70. GRB 090709A: P60 Observations
  71. GRB 090709A: Quasiperiodic variations in the BAT light curve
  72. GRB 090709A: NOT optical observations
  73. GRB 090709A: RAPTOR Limits During Gamma-Ray Emission
  74. GRB 090709A: Swift XRT Refined Analysis
  75. GRB090709A: High Energy BAT/XRT Analysis Suggests Low to Moderate Redshift
  76. GRB 090709A: Wyoming Infrared Observatory NIR upper limits
  77. GRB 090709A, RIMOTS optical upper limits
  78. GRB 090709A: Enhanced Swift-XRT position
  79. GRB 090709A - PAIRITEL Discovery of a Red Afterglow
  80. GRB 090709A: Subaru NIR observation
  81. GRB 090709 : planned Suzaku-ToO observation
  82. GRB 090708 : Fermi GBM detection
  83. GRB 090709: Faulkes Telescope North Upper Limits
  84. GRB 090626: Suzaku WAM observation of the prompt emission
  85. GRB 090709: PAIRITEL NIR Upper Limits
  86. GRB 090704: Fermi GBM observation
  87. GRB 090709: Swift detection of a bright burst
  88. GRB 090708: Early RAPTOR Optical Limits
  89. GRB 090708, Swift-BAT refined analysis
  90. GRB 090704: a long GRB found in INTEGRAL off-line analysis
  91. GRB 090706: Fermi GBM detection
  92. Possible GRB090705: Swift-XRT observations
  93. GRB 090705: PAIRITEL NIR Observations
  94. GRB 090705: Swift detection of a possible burst
  95. XRF 090702 : RTT150 optical observations
  96. GRB 090529: CrAO optical upper limit
  97. GRB 090529: MTM-500 optical observations
  98. XRF 090702: Swift-XRT refined analysis
  99. GRB 090703: Fermi GBM detection
  100. GRB 090702: UVOT upper limits

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