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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"

32722 results found.

  1. GRB 060607: PROMPT Observations
  2. GRB 060607: REM NIR afterglow
  3. GRB 060522: PROMPT Optical Limits
  4. GRB 060605 BAT refined analysis
  5. GRB 060605: Xinglong TNT optical observations
  6. GRB060602B : REM infrared observations
  7. GRB060605: Swift/UVOT detections
  8. GRB 060605: Swift-XRT Team refined analysis
  9. SALT spectroscopy of GRB 060605
  10. GRB 060605: TNG optical observations
  11. GRB 060605: RTT150 optical observations
  12. GRB060605: Spectral Observations and Redshift
  13. GRB 060605: ROTSE-III Optical Counterpart
  14. GRB 060605: ROTSE-III Detection of Optical Counterpart
  15. GRB060604: Swift/UVOT detections
  16. GRB 060604: redshift
  17. GRB 060512: Keck Redshift
  18. GRB 060604 optical photometry
  19. GRB 060604: Swift-XRT Team refined analysis
  20. GRB 060604: BAT refined analysis
  21. GRB 060604A: ROTSE-III Optical Limits
  22. GRB 060602A: Swift-BAT Refined Analysis: Correction
  23. GRB 060602B: XMM-Newton Survey Source
  24. GRB 060602B: Swift-XRT Refined Analysis
  25. GRB 060602B: Swift-BAT Refined Analysis
  26. GRB 060602B: Swift/UVOT observations
  27. GRB 060602A: Swift-BAT Refined Analysis
  28. GRB 060211A : WIDGET simultaneous optical observations
  29. GRB060602A: optical observations(/transient?)
  30. GRB 060526: Tautenburg Second Epoch Observations
  31. GRB060602A: Bootes-IR observations
  32. GRB 060602B: Swift detection of a burst
  33. GRB060602B: Watcher observations - no OT candidate
  34. GRB060602B: BOOTES-IR candidate afterglow
  35. GRB 060502A: Optical afterglow observations
  36. GRB 060526: Break in X-ray light curve
  37. GRB 060526: RTT150 optical observations
  38. GRB060526, optical observations
  39. GRB 051227 : WIDGET simultaneous optical observations
  40. GRB 051028 : WIDGET pre-trigger limit
  41. GRB 060526: RTT150 optical observations
  42. GRB 060526: Multiple Optical Flares
  43. GRB060526: afterglow fitting and probable jet break
  44. GRB 060526: RTT150 optical observations
  45. GRB060526: Optical counterpart from MIRO
  46. GRB060502b: optical observations
  47. GRB 060526: RTT150 optical observations
  48. GRB 060526: Tautenburg OT observation and light curve fitting
  49. GRB060526: optical observations
  50. GRB 060526: SMARTS optical/IR afterglow observations
  51. GRB060526: possible break in the optical light curve
  52. GRB 060526: REM observations
  53. GRB 060526: RTT150 optical observations, afterglow flattening
  54. GRB 060526: Optical Flare
  55. GRB 060526: MDM-2.4m Observations
  56. GRB 060526: Refined analysis of the Swift-BAT burst
  57. GRB 060526: RTT150 optical observations
  58. GRB060526: Further Swift-UVOT Observations
  59. GRB 060526: Magellan Redshift
  60. GRB 060526: Swift/XRT Team refined analysis
  61. GRB 060526: TNG optical observations
  62. GRB 060526: ROTSE-III Observations of Optical Counterpart
  63. GRB 060526: Watcher Observations
  64. GRB060526 - SDSS Pre-burst Observations
  65. GRB 060526: Continued emission for the Swift burst
  66. GRB060505: VLT observations of the optical afterglow
  67. GRB 060413 : WIDGET simultaneous optical observations
  68. GRB 060522: Swift/UVOT Observations: Correction
  69. GRB 060522: Swift/UVOT Observations of the Optical Afterglow
  70. XMM-Newton observation of GRB060510b
  71. GRB060512: Late-Time P200 Observations
  72. GRB060522: z = 5.11 Keck-LRIS Redshift
  73. GRB 060522: Swift/XRT Team refined analysis
  74. GRB 060522: Swift-BAT Refined Analysis
  75. GRB 060522: REM NIR observations
  76. GRB 060522: TNG optical observations
  77. GRB 060512: reanalysis of optical spectra
  78. GRB 060515: NIR observation
  79. GRB 060210: Jet Break in the XRT light curve
  80. GRB 060516: Refined analysis of the Swift-BAT burst
  81. GRB 060512: TNG optical spectroscopy
  82. GRB060515: P200 NIR Observations
  83. GRB 060505 BAT refined analysis
  84. GRB 060515 BAT refined analysis
  85. GRB 060515: Swift/XRT Team refined analysis
  86. GRB 060515: Swift/UVOT Upper Limits
  87. GRB 060515: Swift/XRT position
  88. GRB 060515: Super-LOTIS Observations
  89. GRB060515: Swift/UVOT initial observation
  90. GRB 060515: ROTSE-III Optical Limits
  91. VLT optical spectroscopy of GRB 060512
  92. Swift/UVOT observations of GRB060512.
  93. GRB 060512: Subaru NIR observation
  94. GRB060512: Swift XRT Team refined analysis
  95. GRB 060512: 1.54m Kuiper Observations
  96. GRB 060512: Detection of NIR afterglow
  97. GRB 060512: P60 Observations
  98. GRB 060512: Swift-BAT Refined Analysis
  99. GRB 060505 - OT candidate + galaxy spectrum
  100. GRB 060512: optical decay

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