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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"

26350 results found.

  1. GRB 110520A: NOT optical follow-ups
  2. GRB 110521A: Swift-BAT refined analysis
  3. GRB 110521A: Enhanced Swift-XRT position
  4. GRB 110521A: Swift detection of a burst
  5. GRB 110520A: Swift-BAT refined analysis
  6. GRB 110520A: IAC80 I-band observations
  7. GRB 110520A: Swift-XRT refined Analysis
  8. GRB 110520A: Enhanced Swift-XRT position
  9. GRB 110520A: WHT IR observations
  10. GRB 110520A: TAROT Calern observatory optical observations
  11. GRB 110520A: Swift detection of a burst
  12. Konus-Wind observation of GRB 110518A
  13. Radio observations of GRB 110428A with the EVLA
  14. GRB 110519A, Swift-BAT refined analysis
  15. GRB 110519A: Swift detection of a burst
  16. GRB 110426A: Fermi GBM detection
  17. GRB 110428A: Fermi-GBM observation
  18. GRB 110503A: TAROT Calern observatory optical observations
  19. GRB 110503A: Jet Break seen from TLS
  20. Konus-Wind observation of GRB 110503A
  21. GRB 110422A: Herschel FIR observation preliminary report
  22. GRB 110503A: R-band Detection
  23. GRB 110503A: SARA-N Observations and Photometric Calibration
  24. GRB 110503A: Swift-XRT refined Analysis
  25. GRB 110503A: redshift confirmation from TNG
  26. GRB 110503A - TLS Afterglow Observations
  27. GRB 110503A: Swift-BAT refined analysis
  28. GRB 110503A: Enhanced Swift-XRT position
  29. GRB 110503A: Swift detection of a burst with a bright optical counterpart
  30. GRB 110428A : X-ray afterglow confirmation
  31. GRB 110428A: Suzaku WAM observation of the prompt emission
  32. Konus-Wind observation of GRB 110428A
  33. GRB 110422A: Suzaku WAM observation of the prompt emission
  34. Konus-Wind observation of GRB 110422A
  35. GRB 110422A: Swift/UVOT Detection of optical afterglow
  36. GRB 110422A: Swift-XRT refined Analysis
  37. GRB 110422A: THO optical observations
  38. GRB 110422A: Enhanced Swift-XRT position
  39. GRB 110422A: Swift-BAT refined analysis
  40. GRB 110422A: Swift detection of a burst
  41. GRB110420A: GROND detection of the Optical/NIR Afterglow Candidate
  42. GRB 110420B: Swift-XRT afterglow candidate retraction
  43. GRB 110420B: Fermi GBM observation
  44. Konus-Wind observation of GRB 110420A
  45. GRB 110420B, GROND observations
  46. GRB 110420B: Swift-BAT refined analysis
  47. GRB 110420A: Swift-BAT refined analysis
  48. GRB 110420B: Swift detection of a short hard burst
  49. GRB 110420A: Swift-XRT refined Analysis
  50. GRB 110420A: Enhanced Swift-XRT position
  51. GRB 110420A: Swift detection of a burst with optical counterpart
  52. GRB 110414A: GROND upper limits
  53. GRB 110414A: Swift-BAT Refined Analysis
  54. GRB 110414A: Swift-XRT refined Analysis
  55. GRB 110414A: Enhanced Swift-XRT position
  56. GRB 110328A / Swift J164449.3+573451: WISE quiescent source upper limit
  57. GRB 110414A: Swift detection of a burst
  58. GRB 110412A: Swift-BAT refined analysis
  59. GRB 110411A: Swift-XRT refined Analysis
  60. GRB 110412A: Fermi GBM observation
  61. GRB 110412A: Swift detection of a burst
  62. GRB 110411A, Swift-BAT refined analysis
  63. GRB 110411A: Enhanced Swift-XRT position
  64. GRB 110411A: Swift detection of a burst
  65. GRB 110407A: Swift-XRT refined Analysis
  66. GRB 110328A / Swift J164449.3+573451: VLBA Observations
  67. GRB 110406A: Positional coincidence with NGC 404
  68. GRB110407A: UVOT Upper Limits
  69. GRB 110407A: GROND Detection of the Optical Afterglow
  70. GRB 110407A: Enhanced Swift-XRT position
  71. GRB 110407A: Swift-BAT refined analysis
  72. IPN triangulation of the bright GRB110406A
  73. GRB 110407A : Lulin optical afterglow detection
  74. GRB 110407A: Prompt enhanced Swift-XRT position
  75. GRB 110407A: Swift detection of a burst
  76. Konus-Wind observation of GRB 110406A
  77. GRB 110406A: An exceptionally bright burst detected by INTEGRAL SPI-ACS
  78. GRB 110402A: Suzaku WAM observation of the prompt emission
  79. GRB 110402A: LOAO Optical Observation
  80. ICSP VLF observation of multiple SGR-like bursts from 1E 1841-045 on Feb. 9, 2011
  81. GRB 110328A / Swift J164449.3+573451, HST Observations
  82. GRB 110328A / Swift J164449.3+573451: millimeter detection at PdBI
  83. GRB 110402A: Konus-Wind spectral lags and detailed energetics
  84. GRB 110401A: Fermi GBM detection
  85. GRB 110402A: Fermi GBM detection
  86. GRB 110402A: optical observations in Mondy
  87. GRB 110328A / Swift J164449.3+573451: Keck/DEIMOS Optical Spectroscopy
  88. GRB 110328A/Swift J164449.3+573451: SARA-N detection
  89. Konus-Wind observation of GRB 110402A
  90. GRB 110328A: Konkoly observations.
  91. GRB 110402A: Swift-BAT refined analysis
  92. GRB 110402A: Swift-XRT refined Analysis
  93. GRB 110402A: early optical limit by "Pi of the Sky"
  94. GRB110328A/Swift J164449.3+573451: Fermi LAT Observations
  95. GRB 110402A: Enhanced Swift-XRT position
  96. GRB 110402A: NOT afterglow confirmation
  97. GRB 110402A: Swift detection of a burst
  98. GRB 110328A / Swift J164449.3+573451: KASINICS NIR Observation
  99. GRB 110328A / Swift J164449.3+573451: Radio-optical/NIR Astrometry
  100. GRB 110328A / Swift J164449.3+573451: Infrared transient

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