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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"

38578 results found.

  1. GRB 080603: A long GRB detected by INTEGRAL
  2. SGR 1627-41: Chandra/RXTE/Swift Observations Scheduled
  3. GRB 080602: Swift-XRT refined analysis
  4. Konus-Wind observation of GRB 080602
  5. GRB 080602: NOT R-band upper limit
  6. GRB 080602: Enhanced Swift-XRT position
  7. GRB 080602: Swift detection of a burst
  8. Swift analysis of BAT Slew Survey event (Trigger=009)
  9. GRB 080523: afterglow confirmation and redshift constraints
  10. Konus-Wind observation of reactivation of SGR 1627-41
  11. Reactivation of SGR 1627-41
  12. GRB 080524: Swift XRT and UVOT analysis
  13. GRB 080524: Swift-BAT detection of a burst in ground analysis
  14. GRB 080523: Swift-XRT refined analysis
  15. GRB 080523, Swift-BAT refined analysis
  16. GRB 080520: VLT host detection
  17. GRB 080523: VLT optical observations
  18. Swift/UVOT observations of GRB 080523
  19. GRB 080523: Enhanced Swift-XRT position
  20. GRB 080523: Swift detection of a burst
  21. GRB 080515: NIR magnitude correction
  22. GRB 080515: KPNO 4m NIR afterglow detection
  23. GRB080521(?): detection of possible burst from BAT slew data and XRT ToO
  24. GRB 80516: Swift/UVOT Observations
  25. GRB 080515: Swift-XRT position and analysis
  26. GRB 080514B: UVOT Observations
  27. GRB080520: Swift/UVOT observations
  28. GRB 080520: VLT redshift
  29. GRB 080520, GROND observations
  30. GRB 080520: Enhanced Swift-XRT position
  31. GRB 080520: Swift XRT Refined Analysis
  32. GRB 080520: Swift detection of a burst with optical afterglow
  33. GRB 080514B: Suzaku WAM observation of the prompt emission
  34. Konus-Wind observation of GRB 080514B
  35. GRB 080514B: second epoch Swift XRT data confirms the X-ray afterglow
  36. GRB 080503: Further HST imaging
  37. GRB 080517, Swift-BAT refined analysis
  38. GRB 080516, GROND further analysis
  39. GRB 080517: Swift-XRT refined analysis
  40. GRB 080514B: Further NIR observations
  41. GRB 080517: Enhanced Swift-XRT position
  42. GRB 080517: Swift detection of a burst
  43. GRB 080516, GROND 2nd epoch observations
  44. GRB 080516, GROND observations
  45. GRB080430: optical observations
  46. GRB 080516, SMARTS optical/IR observations
  47. GRB 080516: Swift-XRT Team refined analysis
  48. GRB 080516: Enhanced Swift-XRT position
  49. GRB 080514B: NOT observations
  50. GRB 080516: Swift detection of a burst
  51. Errartum: VLA upper limit on GRB 080507
  52. VLA upper limit on GRB 080705
  53. GRB 080514B : redshift estimation
  54. Konus-Wind observation of GRB 080513
  55. IPN triangulation of bright GRB 080513
  56. Swift-BAT refined analysis for Trigger 311603: Galactic source
  57. GRB 080514B: KPNO 4m IR observations
  58. GRB 080514B: slow fading behaviour ?
  59. GRB 080514B: Swift-XRT analysis
  60. GRB 080514B, GROND observations
  61. GRB 080515: Swift detection of a burst
  62. GRB 080514B: Finding chart
  63. GRB 080514B: Afterglow candidate
  64. GRB 080514B: Watcher observations
  65. GRB 080514B: possible AGILE detection at E>50 MeV
  66. GRB 080514B: SuperAGILE/IPN GRB Localization
  67. Swift detection of a possible galactic transient
  68. GRB080514: REM NIR & Optical Observations
  69. Konus-Wind observation of GRB 080507
  70. GRB 080319B: Further HST observations and underlying host
  71. GRB 080506: NAYUTA Optical Observation
  72. GRB 080507: Suzaku WAM observation of the prompt emission
  73. GRB 080507: Swift XRT analysis confirms the X-ray afterglow
  74. GRB 080507: Keck photometry
  75. GRB 080503: Chandra Observation of X-ray Rebrightening or Flattening
  76. GRB080507: Swift/UVOT followup observations
  77. GRB 080506:Optical observations from HCT
  78. GRB 080507: Swift-XRT position of a possible afterglow
  79. GRB 080506: VLA radio upper limit
  80. GRB 080507: GRB localization by SuperAGILE
  81. GRB 080503: Fading in continued Gemini imaging
  82. GRB080506: Swift/UVOT observations
  83. GRB 080506, Swift-BAT refined analysis
  84. GRB080503, RIMOTS optical upper limit
  85. GRB 080506: Observations from NOT
  86. GRB 080506: TLS afterglow detection in VRIZ
  87. GRB 080506: Enhanced Swift-XRT position
  88. GRB 080506: Optical observation with KANATA/TRISPEC
  89. GRB 080506: Swift detection of a burst with optical afterglow
  90. GRB 080503: VLA radio upper limit
  91. GRB 080503: Observations from NOT
  92. GRB 080430: TLS imaging one day after the GRB
  93. GRB 080503: No further optical rebrightening
  94. GRB 080503: Late-time Optical rebrightening (possible mini-SN)
  95. GRB 080503, Swift-BAT lag and time-resolved spectral analysis
  96. GRB 080503: MITSuME Ishigakijima optical upper limits
  97. GRB080503: Swift/UVOT Upper Limits
  98. GRB080503 XRT refined analysis
  99. GRB 080503, Swift-BAT refined analysis
  100. GRB 080430

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