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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"

26535 results found.

  1. GRB 060526: SMARTS optical/IR afterglow observations
  2. GRB060526: possible break in the optical light curve
  3. GRB 060526: RTT150 optical observations, afterglow flattening
  4. GRB 060526: Optical Flare
  5. GRB 060526: Refined analysis of the Swift-BAT burst
  6. GRB060526: Further Swift-UVOT Observations
  7. GRB060526, optical observations
  8. GRB 060526: Swift/XRT Team refined analysis
  9. GRB060526 - SDSS Pre-burst Observations
  10. GRB 060413 : WIDGET simultaneous optical observations
  11. XMM-Newton observation of GRB060510b
  12. GRB060512: Late-Time P200 Observations
  13. GRB 060522: Swift/XRT Team refined analysis
  14. GRB 060522: Swift-BAT Refined Analysis
  15. GRB 060522: REM NIR observations
  16. GRB 060522: TNG optical observations
  17. GRB 060516: Refined analysis of the Swift-BAT burst
  18. GRB 060512: TNG optical spectroscopy
  19. GRB 060505 BAT refined analysis
  20. GRB 060515 BAT refined analysis
  21. GRB 060512: TAROT optical observation
  22. GRB 060515: Swift/XRT Team refined analysis
  23. GRB 060515: Swift/XRT position
  24. GRB 060515: Super-LOTIS Observations
  25. GRB 060515: TAROT optical observation
  26. VLT optical spectroscopy of GRB 060512
  27. GRB 060512: Subaru NIR observation
  28. GRB060512: Swift XRT Team refined analysis
  29. GRB 060512: 1.54m Kuiper Observations
  30. GRB 060512: Detection of NIR afterglow
  31. GRB 060512: P60 Observations
  32. GRB 060512: Swift-BAT Refined Analysis
  33. GRB 060512: optical decay
  34. GRB 060512: REM NIR observations
  35. GRB060512 - SDSS Pre-Burst Observations
  36. Konus-Wind observation of GRB 060510A
  37. GRB060418: optical observations
  38. GRB 060428a, SMARTS optical/IR afterglow detection
  39. GRB060510B: Swift XRT refined analysis
  40. GRB 060510A: Refined analysis of the Swift-BAT burst
  41. GRB 060510B: Swift-BAT Refined Analysis
  42. GRB060510A: XRT refined analysis
  43. GRB060510 - SDSS Pre-Burst Observations
  44. GRB060510B : Faulkes North Telescope detection
  45. GRB 060510B: Super-LOTIS Observations
  46. GRB 060510: Swift detection of a burst with optical transient
  47. GRB 060507: Final Refined analysis of the Swift-BAT burst
  48. GRB 060507: Swift-BAT Refined Analysis
  49. GRB 060429: Suzaku WAM observation
  50. GRB060425: new MASTER survey method
  51. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  52. GRB 060502B: AROMA refined photometric calibration
  53. GRB 060502b: Gemini imaging and spectroscopy
  54. GRB 060502A: Swift/UVOT source detection
  55. GRB 060429: Refined IPN error box and Konus-Wind spectrum
  56. GRB 060502B: AROMA optical observations
  57. GRB 060502B: Refined analysis of the Swift-BAT short burst
  58. GRB 060427B Milagro GeV/TeV Observations
  59. GRB 060501: P60 Observations and Candidate Retraction
  60. GRB 060502B: MASTER optical observations
  61. GRB060502: Swift-XRT refined analysis
  62. GRB 060502: Swift-BAT refined analysis
  63. GRB 060502: APO Spectroscopic Observations
  64. GRB060502: Super-LOTIS Observations
  65. GRB 060501: MDM Observations
  66. GRB060501: Super-LOTIS observations
  67. GRB060501: P60 imaging and afterglow candidate
  68. GRB 060501: Refined analysis of the Swift-BAT burst
  69. IPN triangulation of GRB060429 (short/hard)
  70. Konus-Wind observation of GRB 060427B
  71. GRB060428B - SDSS Pre-Burst Observations
  72. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  73. GRB 060428B: MDM Observations
  74. GRB 060427B: MASTER optical observations
  75. GRB060428B: Swift XRT Team refined analysis
  76. GRB 060427B: IPN localization of a short hard burst
  77. GRB 060428B: Refined analysis of the Swift-BAT burst
  78. GRB 060428B: KAIT observations
  79. GRB060425:MASTER optical limit
  80. GRB 051117A: Bright host galaxy not confirmed
  81. GRB060428B, optical observation
  82. GRB 060428A: Refined analysis of the Swift-BAT burst
  83. GRB060427:MASTER optical limit
  84. GRB060428A: Swift XRT Team refined analysis
  85. GRB 060427: NOT observations
  86. GRB 060427: Refined analysis of the Swift-BAT burst
  87. GRB060427: Swift XRT Team refined analysis
  88. GRB060418: Swift XRT Team Further Refined Analysis
  89. GRB060425:MASTER survey observations
  90. GRB 060425: IPN localization and KW spectrum of a short, hard burst
  91. An interactive program for GRB pseudo-redshift computations
  92. GRB060418: Further Analysis of MIKE Spectroscopy
  93. GRB 060424: Refined analysis of the Swift-BAT burst
  94. OT 060420: CONCAM detection of a candidate new magnitude 5 optical
  95. GRB 060421: Swift-BAT Refined Analysis
  96. GRB 060421: Swift-XRT refined analysis
  97. GRB 060418: prediction of t_break
  98. Konus-Wind observation of GRB 060418
  99. GRB(?)060421:MASTER optical limit
  100. GRB 060418: JHKs PAIRITEL Observations of Afterglow

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