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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"

15387 results found.

  1. GRB 081025: Suzaku WAM observation of the prompt emission
  2. GRB 081024B: Suzaku WAM observation of the prompt emission
  3. GRB 081029: REM observations
  4. GRB 081029: GROND Detection of the Optical/NIR Afterglow
  5. GRB 081028B: Fermi GBM detection
  6. GRB081028: UVOT detection of a brightening afterglow
  7. Swift UVOT observations of GRB081028
  8. GRB 081028: TAROT Calern observatory optical observations
  9. GRB 081028: optical observations at the NOT
  10. GRB 081028: GROND Detection of the Optical/NIR Afterglow Candidate
  11. Fermi LAT/GBM short-hard GRB 081024B: Possible TLS Afterglow (Corrected)
  12. Fermi LAT/GBM short-hard GRB 081024B: Possible TLS Afterglow
  13. GRB081025: RTT150 optical observations
  14. GRB081024B: P200 Observations
  15. GRB 081025 BAT refined analysis
  16. Swift UVOT observations of GRB081025
  17. Konus-Wind observation of GRB 081025
  18. GRB 081025: Burst detection from Swift-BAT slew data
  19. GRB 081024B: Fermi Gamma-ray Burst Monitor detection
  20. Fermi-LAT observation of GRB 081024B
  21. Swift UVOT observations of GRB 081024
  22. GRB 081024: Faulkes Telescope North optical observations
  23. Swift trigger 332287 is not a GRB
  24. Swift detection of a possible burst (trigger 332287)
  25. GRB 081017: REM early observations
  26. GRB 081011: Swift XRT refined analysis
  27. GRB 081016: A long GRB discovered by INTEGRAL
  28. Detection of flare star Algol in Swift-BAT slew data
  29. GRB 081009: Fermi GBM detection
  30. GRB 081008: Galaxy associated with z=1.967 absorber
  31. GRB 081012: Fermi GBM detection
  32. GRB 081007 and GRB 081007B: Fermi GBM detection
  33. GRB 081008 optical upper limit
  34. GRB 081012: Observations from NOT
  35. GRB 081012: Swift/UVOT analysis of initial observations
  36. Konus-Wind observation of GRB 081001
  37. GRB 081008: VLT redshift confirmation
  38. GRB081008: Swift/UVOT observations
  39. GRB 081007: Early RAPTOR measurements of optical counterpart
  40. GRB 081007, Faulkes Telescope North optical observations
  41. Fermi GBM detection of additional bursts from AXP 1E1547.0-5408
  42. GRB 081001: Further observations from OSN
  43. AXP 1E1547.0-5408: Swift-XRT Team refined analysis
  44. GRB 081003B: a long GRB detected with INTEGRAL
  45. AXP 1E1547.0-5408 (SGR 1550-5418): Fermi GBM detection
  46. GRB 081003: A long GRB discovered by INTEGRAL
  47. GRB 081001: Observations from OSN
  48. GRB 080925: Suzaku WAM observation of the prompt emission
  49. GRB 081001: Swift UVOT Observations
  50. GRB081001: SuperAGILE Localization of a long GRB
  51. GRB080928: redshift retraction
  52. GRB 080928: Watcher observations
  53. GRB 080928: VLT redshift
  54. GRB 080928: GROND DETECTION
  55. GRB 080920: Fermi GBM detection
  56. GRB080922, optical upper limit
  57. GRB080916A: Suzaku WAM observation of the prompt emission
  58. GRB080922: A long GRB detected by INTEGRAL
  59. GRB 080913B: Fermi GBM detection
  60. Trigger 324561: IGR J08408-4503 detected by Swift
  61. GRB 080916C: GROND Confirmation of the Optical Afterglow
  62. GRB 080916C: GROND Confirmation of the Optical Afterglow
  63. GRB 080919: REM NIR observations
  64. GRB080913: Swift-BAT spectral lag
  65. SGR 0501+4516: preliminary results of the Suzaku ToO observation
  66. GRB 080916A: Fermi GBM detection
  67. GRB 080916C: Swift UVOT Refined Analysis
  68. GRB 080916C: Swift XRT refined analysis
  69. Konus-Wind observation of GRB 080916A
  70. Konus-Wind observation of GRB 080916C
  71. GRB 080916C: GROND Detection of the Optical Afterglow Candidate
  72. GRB 080913: Konus-Wind and Swift/BAT joint spectral analysis
  73. GRB 080916B: Swift UVOT Refined Analysis
  74. IPN Triangulation and Energy Spectrum of GRB080916C
  75. GRB080916A: Refined Swift/UVOT Observations
  76. GRB 080915a, SMARTS optical/IR observations
  77. GRB 080916C: Fermi LAT observation
  78. SGR 0501+4516 : P200 i-band observations
  79. GRB 080913: Swift-XRT refined analysis
  80. GRB 080913: GROND photo-z
  81. GRB 080913: VLT/FORS2 observations
  82. GRB 080913: REM NIR early observations
  83. GRB 080913: GROND observation of a high-z optical/NIR afterglow candidate
  84. GRB 080906: Watcher observations
  85. Swift-BAT/-XRT refined analysis on trigger 324362 (LS I +61 303)
  86. GRB 080905C: Fermi GBM detection
  87. SGR J0501+4516: radio pulsar searches with GBT and WSRT
  88. Swift trigger 324362 (LS I +61 303 ?): XRT
  89. Swift trigger 324362 (LS I +61 303 ?)
  90. GRB 080905B: Watcher optical detection
  91. GRB 080904: Fermi Gamma-ray Burst Monitor detection
  92. GRB 080905B: Fermi Gamma-ray Burst Monitor detection
  93. Swift Trigger 324116 is known source again
  94. Swift Trigger 324112 is known source Swift J1842.5-1124
  95. GRB 080906: Refined Swift/UVOT Observations
  96. GRB 080906: GROND observations of the optical/NIR afterglow
  97. GRB 080905B: Refined UVOT Analysis
  98. GRB 080905B: VLT redshift
  99. GRB 080825C: Fermi GBM Spectral Analysis
  100. GRB 080905: Swift detection of a probably-short burst

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