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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"

43046 results found.

  1. GRB 110915B: GROND Observations of the Optical/NIR Afterglow Candidate
  2. GRB 110915A: Swift/UVOT Upper Limits
  3. GRB 110915B: Swift/UVOT Upper Limits
  4. GRB 110915A: GROND Upper limits
  5. GRB 110915A, Swift-BAT refined analysis
  6. GRB 110915A: Swift-XRT refined Analysis
  7. GRB 110915A: Deep Near-IR Limits from Magellan
  8. GRB 110915B: XRT afterglow candidate
  9. GRB 110903A: Suzaku WAM observation of the prompt emission
  10. GRB 110915A: Deep Gemini-South i/z-band imaging
  11. GRB110915A MITSuME Okayama J-band upper-limit
  12. GRB 110915A: MITSuME Okayama and Ishigakijima Optical upper limits
  13. GRB 110915A: NOT observations
  14. GRB 110915B: SuperAGILE localization of a long GRB
  15. GRB 110915A: Enhanced Swift-XRT position
  16. GRB 110915A: GMG optical upper limit
  17. GRB 110915A: MITSuME Akeno Optical upper limits
  18. GRB 110915A: MASTER-Net early limit
  19. GRB 110915A: Prompt enhanced Swift-XRT position
  20. GRB 110915A: Swift detection of a burst
  21. GRB 110825A: Further Swift/XRT Observations
  22. GRB 110731A: SAO RAS and Terskol observations
  23. GRB 110906A(?): Burst detection (unconfirmed) from Swift-BAT slew data
  24. MAXI J1836-194 (originally GRB 110905A): Swift-BAT refined analysis
  25. GRB 110905A: Potential BAT trigger on MAXI J1836-194
  26. GRB 110905A: KAIT observations
  27. GRB 110905A: Swift detection of a burst
  28. GRB 110903A: Fermi GBM observation
  29. GRB 110903A: Swift/UVOT Upper Limits
  30. GRB 110903A: Swift-XRT observations
  31. Konus-Wind observation of GRB 110903A
  32. GRB 110903A: a long GRB detected by INTEGRAL
  33. SGR Swift J1834.9-0846: Correction to the Swift-BAT refined spectral analysis
  34. Trigger 502024: Swift detection of KS 1741-293
  35. GRB110825A: Fermi GBM observation
  36. Swift detection of an SGR burst from Swift J1834.9-0846
  37. GRB 110825A: Suzaku WAM observation of the prompt emission
  38. GRB 110825A: GMG optical observation
  39. GRB 110827A, Swift-BAT refined analysis
  40. GRB 110825A: optical afterglow candidate
  41. GRB 110827A: Swift detection of a burst
  42. GRB 110825A: field inspection and possible host galaxy
  43. GRB110825A: Swift target of opportunity observation
  44. IPN triangulation of GRB110825A (very intense, long-duration)
  45. GRB 110820A, the review of the sky area in plate archives
  46. Swift-BAT Trigger 501485 is noise
  47. Swift-BAT refined analysis of SFXT IGR J08408-4503 (trigger 501368)
  48. Swift J1834.9-0846: Precise X-ray Position and the Confirmation of its Spin Period
  49. Konus-Wind observation of GRB 110820B
  50. GRB 110820A: MASTER-NET first hour observations
  51. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  52. GRB 110820A: Swift/UVOT Upper Limits
  53. GRB 110820A: Position udpate + 2nd epoch data
  54. GRB 110820A: i-band finding chart + correction to 12295
  55. GRB 110820A: CQUEAN izY Observation
  56. GRB 110820A: Swift-XRT refined Analysis
  57. GRB110820A: MITSuME Ishigakijima Optical Upper Limits
  58. GRB 110820A: Swift-BAT refined analysis
  59. GRB 110820A: Enhanced Swift-XRT position
  60. GRB 110820A: MASTER-NET observations
  61. GRB 110820A: Swift detection of a burst
  62. GRB 110818A: Fermi GBM observation
  63. GRB 110818A: Swift/UVOT Upper Limits
  64. GRB 110818A: Enhanced Swift-XRT position
  65. GRB 110818A: Optical afterglow and redshift from VLT/X-shooter
  66. GRB 110818A: Swift-XRT refined Analysis
  67. GRB 110815A: Swift-XRT and UVOT refined Analysis
  68. GRB 110815A : Suzaku WAM observation of the prompt emission
  69. GRB 110818A: Swift detection of a burst
  70. Konus-Wind observation of GRB 110815A
  71. IPN triangulation of GRB110815A (long, intense)
  72. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  73. GRB 110812A: SuperAGILE localization of a long GRB.
  74. Reprocessed enhanced Swift-XRT positions and GRB products: update
  75. SGR 1834.9-0846/ GRB 110807A, I-band observations
  76. Konus-Wind observation of GRB 110808B
  77. Konus-Wind observation of GRB 110808A
  78. IPN triangulation of GRB 110808B (short/hard/intense)
  79. A new photometric resource for GRB observers
  80. RXTE Discovery of the Spin Period of Swift J1834.9-0846
  81. SGR 1834.9-0846/ GRB 110807A: archival IR observations
  82. GRB 110808A: Swift/UVOT Detection
  83. Swift Trigger 458942 is probably not a burst
  84. GRB 110808A: Swift-BAT refined analysis
  85. GRB 110808A: Swift-XRT refined Analysis
  86. SGR J1834.9-0846: A Neutron Star in W41?
  87. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  88. GRB 110808A: VLT/X-shooter spectroscopy
  89. GRB 110808A: Enhanced Swift-XRT position
  90. GRB 110808A: Swift detection of a burst with optical counterpart
  91. Fermi GBM detection of a SGR-like burst
  92. GRB 110807A: SAO RAS observations
  93. GRB 110807A: Swift detection of a burst or a posible new SGR
  94. GRB 110726A: two epochs of SAO RAS optical observations
  95. Reprocessed enhanced Swift-XRT positions and GRB products
  96. Konus-Wind observation of GRB 110802A
  97. IPN triangulation of GRB110802A (short/hard burst)
  98. GRB 110801A: optical observations in CrAO
  99. EVLA observation for Fermi burst GRB 110721A
  100. GRB 110731A : Suzaku WAM observation of the prompt emission

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