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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"

19662 results found.

  1. GRB 131004A: CARMA 93 GHz upper limit
  2. GRB 131004A: Swift/UVOT Detection
  3. GRB 131004A: RATIR Optical and NIR Upper Limits
  4. GRB 131004A: Swift-XRT refined Analysis
  5. GRB 131004A: GROND observations of the afterglow
  6. GRB 131004A: Enhanced Swift-XRT position
  7. GRB 131004A: Swift detection of a burst (may be short)
  8. GRB 131002A, Swift-BAT refined analysis
  9. GRB 130925A: 3mm observations with CARMA
  10. GRB 131002A: Fermi GBM observation
  11. GRB 130925A/Sw J0244-2609: mm observations at PdBI
  12. GRB 131002B, Swift-BAT refined analysis
  13. GRB 131002B: GROND upper limits
  14. GRB 131002B: Swift-XRT Refined Analysis
  15. GRB 131002B: Swift/UVOT Upper Limits
  16. GRB 131002A: Swift/UVOT Detection
  17. GRB 131001A, Swift-BAT refined analysis
  18. GRB 131002A: Swift-XRT refined Analysis
  19. GRB 131002B: Enhanced Swift-XRT position
  20. GRB 131002A: ISON-NM optical observations
  21. Swift J1242.9-3530, Swift-BAT refined analysis
  22. GRB 131001A: Swift UVOT and XRT Upper Limits
  23. GRB 131002A: Enhanced Swift-XRT position
  24. NuSTAR observations of GRB 130925A
  25. GRB 131002B: Swift detection of a burst
  26. GRB 131002A: Swift detection of a burst
  27. GRB 131001A detected in ground analysis of Swift-BAT data
  28. GRB 130925A: continuing Swift/XRT monitoring
  29. Swift Operations in the event of a US Government shutdown
  30. IPN Observations of GRB 130925A
  31. GRB 130930A: Swift detection of a burst
  32. GRB 130929A: Swift/UVOT Upper Limits
  33. GRB 130831A: Continued RATIR Optical and NIR Observations
  34. GRB 130929A: Swift-XRT refined Analysis
  35. GRB 130929A, Swift-BAT refined analysis
  36. GRB 130929A: Enhanced Swift-XRT position
  37. GRB 130929A: TAROT La Silla observatory optical observations
  38. GRB 130929A: Swift detection of a burst
  39. GRB 130925A: Swift/UVOT Detection of the Host Galaxy
  40. GRB 130925A: Swift/UVOT Upper Limits
  41. GRB 130925A: sub-mm non-detection with SMA
  42. GRB 130925A: Continued RATIR Optical and NIR Observations
  43. GRB 130925A: Fermi GBM Detection
  44. Konus-Wind observation of GRB 130925A
  45. Observation of possible GRB/TDE 130925A by INTEGRAL/SPI-ACS: three activity episodes
  46. GRB 130925A: RATIR Optical and NIR Observations
  47. GRB 130925A Swift-BAT refined analysis
  48. GRB 130925A: Historical non-detection from Rosat-HRI
  49. Fermi GBM detection of GRB 130925A and a possible precursor
  50. GRB 130925A: Swift-XRT refined Analysis
  51. GRB 130925A: Initial Similarities to Swift J1644+57
  52. GRB 130925A: TAROT La Silla observatory optical observations
  53. GRB 130925A: Enhanced Swift-XRT position
  54. GRB 130925A: VLT/X-shooter redshift
  55. GRB 130925A: VLT/UVES observations
  56. GRB 130925A: MAXI/GSC detection
  57. GRB 130925A: GROND afterglow candidate
  58. GRB 130925A: Swift detection of a burst
  59. IPN Triangulation of SGR-like burst 130913 - probable association with SGR/AXP 1E1841-045
  60. GRB 130831A: RATIR Confirmation of NIR/Optical Afterglow Flattening
  61. GRB 130907A: Maidanak optical observations
  62. GRB 130912A: AAO optical upper limit
  63. GRB 130831A: Maidanak optical observations, possible emerging Supernova
  64. GRB 130919A: Skynet PROMPT-CTIO optical upper limits
  65. GRB 130919A, Swift-BAT refined analysis
  66. GRB 130913A detected in ground analysis of Swift-BAT data
  67. GRB 130919A: Swift detection of a burst
  68. GRB 130903A: Further Swift XRT observations.
  69. GRB 130606A: Chandra observation
  70. GRB 130912A: Swift/UVOT Upper Limits
  71. GRB 130912A: RATIR Optical and NIR Upper Limits
  72. Konus-Wind observation of GRB 130912A
  73. GRB 130912A: P60 Observations
  74. GRB 130912A: Swift-XRT refined Analysis
  75. GRB 130907A: MASTER refined analysis
  76. GRB 130912A: Fermi GBM detection
  77. GRB 130912A: Skynet DSO-14/Yerkes-41/PROMPT-CTIO observations
  78. GRB 130912A: Enhanced Swift-XRT position
  79. GRB 130912A, Swift-BAT refined analysis
  80. GRB 130912A: GROND observations
  81. GRB 130912A: Swift detection of a short burst
  82. GRB 120419A: Swift XRT confirmation of the afterglow
  83. GRB 130828A: Further Swift XRT observations
  84. GRB 130907A: Further Swift-BAT refined analysis
  85. GRB 130907A: INTEGRAL/SPI-ACS light curve
  86. Konus-Wind observation of GRB 130907A
  87. GRB 130907A, Swift-BAT refined analysis
  88. GRB 130907A: Swift-XRT refined Analysis
  89. GRB 130907A: Enhanced Swift-XRT position
  90. GRB 120916A: Fermi-LAT detection of a burst
  91. GRB 130907A: Swift/UVOT Detection
  92. GRB 130907A: Early Tautenburg detections, red afterglow
  93. GRB 130907A: Skynet DSO-14/Yerkes-41/GORT confirmation of a fading afterglow
  94. GRB 130907A: RATIR Optical and NIR Afterglow Confirmation
  95. GRB 130907A: Skynet DSO-14/Yerkes-41 detections of a possible afterglow
  96. GRB 130831A: Maidanak optical observations
  97. GRB 130831A: optical observation in Chuguev AO
  98. GRB 130831A: ISON-Kislovodsk optical observations
  99. GRB 130831A: optical observation in Gissar AO
  100. GRB 130831A: ISON-UAFO optical observations

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