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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"

43901 results found.

  1. GRB 110915A: Konus-Wind and Swift/BAT joint spectral analysis
  2. IPN triangulation of GRB 110918A (long duration, extremely intense)
  3. GRB 110915B: GROND Observations of the Optical/NIR Afterglow Candidate
  4. GRB 110915A: Swift/UVOT Upper Limits
  5. GRB 110915A: GROND Upper limits
  6. GRB 110915A, Swift-BAT refined analysis
  7. GRB 110915A: Swift-XRT refined Analysis
  8. GRB 110915B: Afterglow candidate from OSN
  9. GRB 110915A: Deep Near-IR Limits from Magellan
  10. GRB 110915B: XRT afterglow candidate
  11. GRB 110903A: Suzaku WAM observation of the prompt emission
  12. GRB 110915A: Deep Gemini-South i/z-band imaging
  13. GRB110915A MITSuME Okayama J-band upper-limit
  14. GRB 110915A: NOT observations
  15. GRB 110915A: 1.23m CAHA I-band observations
  16. GRB 110915B: SuperAGILE localization of a long GRB
  17. GRB 110915A: Enhanced Swift-XRT position
  18. GRB 110915A: GMG optical upper limit
  19. GRB 110915A: MASTER-Net early limit
  20. GRB 110915A: Prompt enhanced Swift-XRT position
  21. GRB 110915A: Swift detection of a burst
  22. GRB 110825A: Further Swift/XRT Observations
  23. GRB 110731A: SAO RAS and Terskol observations
  24. GRB 110906A(?): Burst detection (unconfirmed) from Swift-BAT slew data
  25. MAXI J1836-194 (originally GRB 110905A): Swift-BAT refined analysis
  26. GRB 110905A / X-ray transient MAXI J1836-194: TNT optical observation
  27. GRB 110905A: Potential BAT trigger on MAXI J1836-194
  28. GRB 110905A: KAIT observations
  29. GRB 110905A: Swift detection of a burst
  30. GRB 110903A: Fermi GBM observation
  31. GRB 110903A: Swift/UVOT Upper Limits
  32. GRB 110903A: Swift-XRT observations
  33. Konus-Wind observation of GRB 110903A
  34. GRB 110903A: a long GRB detected by INTEGRAL
  35. GRB 110820A: optical upper limit
  36. SGR Swift J1834.9-0846: Correction to the Swift-BAT refined spectral analysis
  37. Trigger 502024: Swift detection of KS 1741-293
  38. GRB110825A: Fermi GBM observation
  39. SGR Swift J1834.9-0846: Swift-BAT refined analysis of trigger 501752
  40. Swift detection of an SGR burst from Swift J1834.9-0846
  41. GRB 110825A: Suzaku WAM observation of the prompt emission
  42. GRB 110825A: GMG optical observation
  43. GRB110825A: ROTSE early time optical limit
  44. GRB 110827A, Swift-BAT refined analysis
  45. GRB 110827A: Swift detection of a burst
  46. GRB 110825A: field inspection and possible host galaxy
  47. GRB110825A: Swift target of opportunity observation
  48. IPN triangulation of GRB110825A (very intense, long-duration)
  49. GRB 110820A, the review of the sky area in plate archives
  50. Swift-BAT Trigger 501485 is noise
  51. Swift-BAT refined analysis of SFXT IGR J08408-4503 (trigger 501368)
  52. Fermi GBM trigger 110823.518 is not a GRB
  53. Swift J1834.9-0846: Precise X-ray Position and the Confirmation of its Spin Period
  54. Konus-Wind observation of GRB 110820B
  55. GRB 110820A: MASTER-NET first hour observations
  56. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  57. GRB 110820A: Position udpate + 2nd epoch data
  58. GRB 110820A: i-band finding chart + correction to 12295
  59. GRB 110820A: CQUEAN izY Observation
  60. GRB 110820A: Swift-XRT refined Analysis
  61. GRB 110820A: Swift-BAT refined analysis
  62. GRB 110820A: Enhanced Swift-XRT position
  63. GRB 110820A: CrAO optical upper limit
  64. GRB 110820A: MASTER-NET observations
  65. GRB 110820A: Swift detection of a burst
  66. GRB 110818A: Fermi GBM observation
  67. GRB 110818A: Swift/UVOT Upper Limits
  68. GRB 110818A: Enhanced Swift-XRT position
  69. GRB 110818A: Optical afterglow and redshift from VLT/X-shooter
  70. GRB 110818A: Swift-XRT refined Analysis
  71. GRB 110815A: Swift-XRT and UVOT refined Analysis
  72. GRB 110818A, Swift-BAT refined analysis
  73. GRB 110815A : Suzaku WAM observation of the prompt emission
  74. GRB 110818A: Swift detection of a burst
  75. Konus-Wind observation of GRB 110815A
  76. IPN triangulation of GRB110815A (long, intense)
  77. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  78. GRB 110801A: optical observations at Mt. Terskol observatory
  79. GRB 110812A: SuperAGILE localization of a long GRB.
  80. SGR 1834.9-0846/ GRB 110807A, I-band observations
  81. Konus-Wind observation of GRB 110808B
  82. Konus-Wind observation of GRB 110808A
  83. IPN triangulation of GRB 110808B (short/hard/intense)
  84. A new photometric resource for GRB observers
  85. RXTE Discovery of the Spin Period of Swift J1834.9-0846
  86. SGR 1834.9-0846/ GRB 110807A: archival IR observations
  87. Fermi Gamma-ray Burst Monitor trigger 110809.346 is not a GRB
  88. GRB 110808A: Swift/UVOT Detection
  89. Swift Trigger 458942 is probably not a burst
  90. GRB 110808A: Swift-BAT refined analysis
  91. GRB 110808A: Swift-XRT refined Analysis
  92. SGR J1834.9-0846: A Neutron Star in W41?
  93. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  94. GRB 110808A: VLT/X-shooter spectroscopy
  95. GRB 110808A: Enhanced Swift-XRT position
  96. GRB 110808A: Swift detection of a burst with optical counterpart
  97. Fermi GBM detection of a SGR-like burst
  98. GRB 110807A: SAO RAS observations
  99. GRB 110807A: Swift detection of a burst or a posible new SGR
  100. Fermi Gamma-ray Burst Monitor trigger 110806.263 is not a GRB

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