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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"

32551 results found.

  1. GRB 070923, Swift-BAT refined analysis
  2. GRB 070920B: XRT observations
  3. GRB 070923: Galaxies within BAT localization
  4. GRB 070917: Suzaku/WAM observation of the prompt emission
  5. INTEGRAL ToO observations of SGR1806-20
  6. GRB 070920b, SMARTS optical observation
  7. GRB 070917: Confirmation of the X-ray afterglow
  8. GRB 070920b: LCO optical observations
  9. GRB 070920B, Swift-BAT refined analysis
  10. GRB 070911: Swift/BAT and Suzaku/WAM joint spectral analysis
  11. GRB 070920, Swift-BAT refined analysis
  12. SGR1806-20: Swift-BAT detection of enhanced activity
  13. GRB070917: Confirmation of optical afterglow
  14. GRB920925C: search for host galaxy
  15. GRB070917: optical observations
  16. GRB 070917: P60 Observations
  17. Konus-Wind observation of GRB 070917
  18. Swift Status and XRT Calibration Uncertainties
  19. GRB 070917: Swift-XRT observations
  20. GRB 070917: KAIT optical limits
  21. GRB 070917: MITSuME Akeno Ic upper limit
  22. GRB 070917: R band observations
  23. GRB 070917, Swift-BAT refined analysis
  24. GRB 070911: Suzaku WAM observation of the prompt emission
  25. GRB 070913: Swift-XRT detection of the possible X-ray afterglow
  26. GRB 070809: The Swift evidence for the SHB nature of this burst
  27. GRB 070913: Swift-BAT refined analysis
  28. GRB 070913: Corrected BAT position
  29. GRB 070913: SMARTS optical/IR observations
  30. GRB 070911: PAIRITEL IR Observations
  31. GRB 070911: Swift XRT refined analysis
  32. GRB 070911, Swift-BAT refined analysis
  33. IPN search for a GRB associated with TAROT transient on August 31
  34. Intense burst from SGR 1806-20 detected on September 7
  35. GRB 070809: Confirmation of optical transient
  36. Observations of possible TAROT GRB transient near IC 4779
  37. GRB 070810b: Image Subtraction of Multiple Keck Observations
  38. Las Campanas observations of possible TAROT GRB transient near IC
  39. Konus-Wind observation of GRB 070824
  40. Konus-Wind observation of very bright GRB 070821
  41. GRB 070731: Swift/UVOT Upper Limit
  42. GRB 070805: UVOT afterglow candidate retraction
  43. GRB070810b: optical candidate
  44. GRB 070810A: ROTSE-III Refined Analysis
  45. GRB 061110A: redshift confirmed
  46. GRB 070810B : Faulkes Telescope South Observations
  47. GRB 070810A: Continued Keck Imaging
  48. GRB 070810B: Keck spectroscopy of possible host galaxies
  49. GRB070810B: Swift/UVOT Upper Limits
  50. GRB 070810B: XRT refined analysis
  51. GRB 070810B, Swift-BAT refined analysis
  52. GRB 070809: Swift/UVOT Corrected Photometry
  53. Swift Trigger 287421: False trigger due to star tracker loss
  54. GRB 070810A: Swift-BAT refined analysis
  55. GRB 070810B: Xinglong TNT optical Upper Limit
  56. GRB070810B: Optical observations with KANATA
  57. GRB 070809: Swift/UVOT Upper Limits
  58. VLA upper limit on the short hard burst GRB 070729
  59. GRB 070810: Keck redshift and photometry
  60. No radio detection in superAGILE burst 070724B
  61. GRB 070809: Keck Imaging
  62. GRB 070810: Swift-XRT Team Refined Analysis
  63. GRB 070809: Swift-XRT refined analysis
  64. GRB 070810: Swift/UVOT Optical Counterpart
  65. GRB 070809, Swift-BAT refined analysis
  66. GRB 070809: Optical Pre-imaging from Palomar
  67. GRB 070808: Swift/UVOT upper limits
  68. GRB 070809: ROTSE-III Optical Limits
  69. GRB 070808 : Faulkes Telescope South Observations
  70. GCN Swift XRT update position notices and enhanced position circulars
  71. GRB 070808: Swift XRT refined analysis
  72. GRB 070808, Swift-BAT refined analysis
  73. GRB 070808: OPTIMA-Burst optical upper limit
  74. GRB 070808: Xinglong TNT optical Upper Limit
  75. GRB070808: Optical observations with KANATA
  76. GRB 070808: ROTSE-III Optical Limits
  77. GRB061121A: PROMPT Observations
  78. GRB070805 XRT and UVOT afterglow candidate
  79. GRB070612A: Radio upper limit from GMRT
  80. GRB 070721B: correct afterglow position
  81. Swift/UVOT observations of GRB070805
  82. GRB 070805, Swift-BAT refined analysis
  83. GRB 070805: Swift XRT initial analysis.
  84. UVOT observations of SAXJ1810.8-2609
  85. VLA non-detection of GRB 070721B
  86. GRB 070802: REM optical observations
  87. GRB 070724B: Swift-XRT afterglow confirmation
  88. GRB 070802: Swift-XRT refined analysis
  89. GRB070802: Swift/UVOT upper limits
  90. GRB 070802: Confirmation of the optical afterglow
  91. GRB 070802, Swift-BAT refined analysis
  92. GRB 070802: VLT redshift
  93. GRB 070802: refined Swift XRT position
  94. GRB 070802: V-band detection of the candidate afterglow
  95. GRB 070802: LCO I-band candidate
  96. GRB 070802: GROND J band candidate
  97. GRB 070802: LCO optical observations
  98. GRB 070802: Swift detection of a burst
  99. Konus-A observation of GRB 070729
  100. Swift/UVOT detection of GRB070714B

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