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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"

37289 results found.

  1. GRB 110915A: Swift/UVOT Upper Limits
  2. GRB 110915B: Swift/UVOT Upper Limits
  3. GRB 110915A: GROND Upper limits
  4. GRB 110915A, Swift-BAT refined analysis
  5. GRB 110915A: Swift-XRT refined Analysis
  6. GRB 110915B: Afterglow candidate from OSN
  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. GRB 110915A: MITSuME Okayama and Ishigakijima Optical upper limits
  12. GRB 110915A: NOT observations
  13. GRB 110915A: 1.23m CAHA I-band 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 / X-ray transient MAXI J1836-194: TNT optical observation
  26. GRB 110905A: Potential BAT trigger on MAXI J1836-194
  27. GRB 110905A: KAIT observations
  28. GRB 110905A: Swift detection of a burst
  29. GRB 110903A: Fermi GBM observation
  30. GRB 110903A: Swift/UVOT Upper Limits
  31. GRB 110903A: Swift-XRT observations
  32. Konus-Wind observation of GRB 110903A
  33. GRB 110903A: a long GRB detected by INTEGRAL
  34. GRB 110820A: optical upper limit
  35. GRB110825A: Fermi GBM observation
  36. GRB 110825A: Suzaku WAM observation of the prompt emission
  37. GRB 110825A: GMG optical observation
  38. GRB110825A: ROTSE early time optical limit
  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. IPN triangulation of GRB110825A (very intense, long-duration)
  44. GRB 110820A, the review of the sky area in plate archives
  45. Fermi GBM trigger 110823.518 is not a GRB
  46. Konus-Wind observation of GRB 110820B
  47. GRB 110820A: MASTER-NET first hour observations
  48. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  49. GRB 110820A: Swift/UVOT Upper Limits
  50. GRB 110820A: Position udpate + 2nd epoch data
  51. GRB 110820A: i-band finding chart + correction to 12295
  52. GRB 110820A: CQUEAN izY Observation
  53. GRB 110820A: Swift-XRT refined Analysis
  54. GRB110820A: MITSuME Ishigakijima Optical Upper Limits
  55. GRB 110820A: Swift-BAT refined analysis
  56. GRB 110820A: Enhanced Swift-XRT position
  57. GRB 110820A: CrAO optical upper limit
  58. GRB 110820A: MASTER-NET observations
  59. GRB 110820A: Swift detection of a burst
  60. GRB 110818A: Fermi GBM observation
  61. GRB 110818A: Swift/UVOT Upper Limits
  62. GRB 110818A: Enhanced Swift-XRT position
  63. GRB 110818A: Optical afterglow and redshift from VLT/X-shooter
  64. GRB 110818A: Swift-XRT refined Analysis
  65. GRB 110815A: Swift-XRT and UVOT refined Analysis
  66. GRB 110818A, Swift-BAT refined analysis
  67. GRB 110815A : Suzaku WAM observation of the prompt emission
  68. GRB 110818A: Swift detection of a burst
  69. Konus-Wind observation of GRB 110815A
  70. IPN triangulation of GRB110815A (long, intense)
  71. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  72. GRB 110801A: optical observations at Mt. Terskol observatory
  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. SGR 1834.9-0846/ GRB 110807A: archival IR observations
  81. Fermi Gamma-ray Burst Monitor trigger 110809.346 is not a GRB
  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. GRB 110807A: SAO RAS observations
  92. GRB 110807A: Swift detection of a burst or a posible new SGR
  93. Fermi Gamma-ray Burst Monitor trigger 110806.263 is not a GRB
  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. Fermi GBM trigger 334123030 (110804165) is not a GRB
  98. IPN triangulation of GRB110802A (short/hard burst)
  99. GRB 110801A: optical observations in CrAO
  100. EVLA observation for Fermi burst GRB 110721A

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