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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"

11836 results found.

  1. GRB 110801A: TLS Optical afterglow confirmation
  2. Konus-Wind observation of GRB 110731A
  3. Fermi-LAT Detection of GRB110731A
  4. GRB 110731A: Swift detection of a burst with an optical counterpart
  5. GRB 110726A: optical upper limit in CrAO
  6. Swift detection of a SGR-like burst from the AXP 4U 0142+61
  7. GRB 110726A: Swift detection of a burst
  8. Konus-Wind observation of GRB 110721A
  9. GRB 110721A: Fermi-LAT detection
  10. GRB110715A: spectral lag analysis
  11. GRB 110719A: optical limit by "Pi of the Sky"
  12. GRB 110719A: Swift-XRT refined Analysis
  13. GRB 110719A: Swift detection of a burst
  14. Konus-Wind observation of GRB 110715A
  15. GRB 110709A / EVLA upper limits
  16. Konus-Wind observation of GRB 110708B
  17. GRB 110709B BAT refined analysis
  18. GRB 110709B: Swift-XRT refined Analysis
  19. GRB 110709A: Swift-XRT refined Analysis
  20. Konus-Wind observation of GRB 110709A
  21. Konus-Wind observation of GRB 110709B
  22. GRB110709A: upper limits from CAHA 1.23m and OSN 1.5m
  23. GRB 110708A: Lick observations
  24. GRB 110708A: a long GRB detected by INTEGRAL
  25. Konus-Wind observation of GRB 110705A
  26. GRB 110625A: Fermi GBM and LAT observations
  27. Konus-Wind observation of GRB 110625A
  28. GRB 110625A: ROTSE-III Optical Limits
  29. GRB 110604A: final update on Swift-XRT observations
  30. Konus-Wind observation of GRB 110618A
  31. GRB 110610A: MASTER-NET optical observations
  32. Konus-Wind observation of GRB 110604A
  33. GRB 110530A: Swift-XRT refined Analysis
  34. GRB 110530A: MASTER OT observations
  35. GRB 110530A: Swift detection of a burst with an optical afterglow
  36. Konus-Wind observation of GRB 110529A
  37. Swift J1644+57/GRB 110328A, Additional HST Observations
  38. GRB 110521A: MASTER prompt optical limit
  39. GRB 110521A: Swift-XRT refined analysis
  40. GRB 110521A: Swift detection of a burst
  41. GRB 110520A: Swift-XRT refined Analysis
  42. GRB 110520A: WHT IR observations
  43. GRB 110520A - NOT optical observation
  44. GRB 110520A: MASTER-NET optical observations
  45. GRB 110520A: Swift detection of a burst
  46. Konus-Wind observation of GRB 110518A
  47. IPN localization of bright GRB 110518A
  48. GRB 110519A: Swift detection of a burst
  49. Konus-Wind observation of GRB 110503A
  50. GRB 110422A: MASTER first 30 min OT light curve
  51. GRB 110503A: SARA-N Observations and Photometric Calibration
  52. GRB 110503A: Swift/UVOT Observations
  53. GRB 110503A: Swift-XRT refined Analysis
  54. GRB 110503A: Swift-BAT refined analysis
  55. GRB 110428A: Suzaku WAM observation of the prompt emission
  56. GRB 110422A: optical observations in CrAO
  57. Konus-Wind observation of GRB 110428A
  58. GRB 110428A: Fermi-LAT Detection
  59. GRB 110426A: MAXI/GSC detection of a GRB
  60. GRB 110422A: optical observations in CrAO
  61. Konus-Wind observation of GRB 110422A
  62. GRB 110422A: Swift-XRT refined Analysis
  63. GRB 110422A: THO optical observations
  64. GRB 110420B: Fermi GBM observation
  65. Konus-Wind observation of GRB 110420A
  66. GRB 110420B, GROND observations
  67. GRB 110420B: Swift-XRT afterglow candidate
  68. GRB 110420A: Swift-XRT refined Analysis
  69. GRB 110420A: Swift detection of a burst with optical counterpart
  70. GRB 110414A: Swift-BAT Refined Analysis
  71. GRB 110412A: Swift-BAT refined analysis
  72. GRB 110411A: Swift-XRT refined Analysis
  73. GRB 110411A: MASTER prompt and follow-up optical limits
  74. GRB 110412A: Swift detection of a burst
  75. GRB 110411A: Swift detection of a burst
  76. GRB 110407A: Swift-XRT refined Analysis
  77. GRB 110328A / Swift J164449.3+573451: MASTER pre, prompt and follow-up observations
  78. GRB 110406A: Positional coincidence with NGC 404
  79. GRB 110407A: Swift detection of a burst
  80. Konus-Wind observation of GRB 110406A
  81. GRB 110328A / Swift J164449.3+573451: millimeter detection at PdBI
  82. GRB 110402A: Konus-Wind spectral lags and detailed energetics
  83. GRB 110328A/Swift J164449.3+573451: SARA-N detection
  84. Konus-Wind observation of GRB 110402A
  85. GRB 110402A: Swift-XRT refined Analysis
  86. GRB110328A/Swift J164449.3+573451: Fermi LAT Observations
  87. GRB 110402A: Swift detection of a burst
  88. GRB 110328A / Swift J164449.3+573451: KASINICS NIR Observation
  89. GRB 110328A / Swift J164449.3+573451: Radio-optical/NIR Astrometry
  90. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Detection in 2nd Epoch
  91. GRB 110328B: Fermi-LAT Detection
  92. GRB 110328A/ Swift J164449.3+573451 : Xinglong TNT Upper limit
  93. GRB 110328A: Swift detection of a burst
  94. GRB 110319B BAT refined analysis
  95. GRB 110319B: GROND upper limits
  96. GRB 110319B found in ground analysis of Swift-BAT data
  97. GRB 110319A: Swift-XRT refined Analysis
  98. GRB 110319A: Swift detection of a burst
  99. GRB 110318A: Swift detection of a burst
  100. GRB 110315A: Swift detection of a burst

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