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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"

23707 results found.

  1. GRB 081001: Further observations from OSN
  2. GRB 081003A: Swift-XRT Team position and analysis
  3. Swift-BAT refined analysis of AXP 1E1547.0-5408 (Trigger 330353)
  4. GRB 081003B: a long GRB detected with INTEGRAL
  5. GRB 080928: Fermi GBM detection
  6. GRB 081003: A long GRB discovered by INTEGRAL
  7. SGR 1550-5418 = AXP 1E1547.0-5408 (Trigger 330353)
  8. Swift discovery of a new Soft Gamma Repeater SGR 1550-5418
  9. Trigger 330353: Swift detection of a Galactic short soft burst
  10. GRB 081001: Observations from OSN
  11. GRB 080925: Suzaku WAM observation of the prompt emission
  12. GRB081001: SuperAGILE Localization of a long GRB
  13. GRB 080928: VLT redshift
  14. GRB 080928: Swift/UVOT observations
  15. GRB 080928, Swift-BAT final refined analysis
  16. GRB 080928, Swift-BAT initial refined analysis
  17. GRB 080928: Swift detection of a burst with an optical counterpart
  18. GRB 080925: Fermi GBM Detection
  19. GRB 080920: Fermi GBM detection
  20. GRB080922, optical upper limit
  21. Swift detection of a possible GRB (trigger 325707)
  22. GRB080916A: Suzaku WAM observation of the prompt emission
  23. GRB080922: A long GRB detected by INTEGRAL
  24. GRB 080913B: Fermi GBM detection
  25. Trigger 324561: IGR J08408-4503 detected by Swift
  26. GRB 080919: Swift-XRT refined analysis
  27. GRB 080919, Swift-BAT refined analysis
  28. GRB 080919: Swift detection of a short burst
  29. GRB 080916A: Rapid PROMPT Observations
  30. GRB 080916C: Swift UVOT Refined Analysis
  31. GRB 080916C: Swift XRT refined analysis
  32. GRB 080916B: Swift-XRT refined analysis
  33. Konus-Wind observation of GRB 080916A
  34. Konus-Wind observation of GRB 080916C
  35. GRB 080916C: GROND Detection of the Optical Afterglow Candidate
  36. GRB 080913: Konus-Wind and Swift/BAT joint spectral analysis
  37. IPN Triangulation and Energy Spectrum of GRB080916C
  38. GRB 080916B, Swift-BAT refined analysis
  39. GRB 080915a, SMARTS optical/IR observations
  40. GRB 080916A: Swift XRT refined analysis
  41. GRB 080916A, Swift-BAT refined analysis
  42. GRB 080916B: Swift-XRT afterglow detection
  43. GRB 080916B: Swift detection of a burst
  44. GRB 080916: Swift detection of a burst with optical afterglow
  45. GRB 080915B, Swift-BAT refined analysis
  46. GRB 080915B: Swift detection of a burst
  47. GRB 080915, Swift-BAT refined analysis
  48. SGR 0501+4516 : P200 i-band observations
  49. GRB 080915: Swift detection of a burst
  50. GRB 080913, Swift-BAT refined analysis
  51. GRB 080913: REM NIR early observations
  52. GRB 080913: GROND observation of a high-z optical/NIR afterglow candidate
  53. GRB 080913: Swift detection of a burst
  54. Swift-BAT/-XRT refined analysis on trigger 324362 (LS I +61 303)
  55. GRB 080906B: Fermi GBM detection
  56. Swift trigger 324362 (LS I +61 303 ?)
  57. GRB 080904: Fermi Gamma-ray Burst Monitor detection
  58. Swift Trigger 324122 is again known source Swift J1842.5-1124
  59. Swift Trigger 324116 is known source again
  60. Swift Trigger 324112 is known source Swift J1842.5-1124
  61. GRB 080906, Swift-BAT refined analysis
  62. GRB 080906: GROND observations of the optical/NIR afterglow
  63. GRB 080905B: Refined UVOT Analysis
  64. GRB 080905B: VLT redshift
  65. GRB 080905B, Swift-BAT refined analysis
  66. GRB 080905A, Swift-BAT refined analysis
  67. GRB 080906: Swift detection of a burst with optical afterglow
  68. GRB 080905A: Swift-XRT Refined Analysis
  69. GRB080825C: Fermi-LAT observations
  70. GRB 080905B: Swift detection of a burst with possible optical counterpart
  71. GRB 080905: Swift detection of a probably-short burst
  72. GRB 080903, Swift-BAT refined analysis
  73. GRB 080903: optical observations
  74. GRB 080903: Astrotel-Caucasus optical observations
  75. GRB 080903: Optical afterglow candidate
  76. GRB 080903: TAROT Calern observatory optical observations
  77. GRB 080903: Swift detection of a burst
  78. SGR 0501+4516: Spin Down Rate and Inferred Dipole Magnetic Field
  79. SGR 0501+4516: preliminary results of the first XMM-Newton observation
  80. INTEGRAL ToO observation of SGR0501+4516
  81. SGR 0501+4516: Confirmation of the NIR counterpart
  82. SGR 0501+4516: Detection of possible optical counterpart
  83. Swift trigger 322590: BAT detection of a possible burst
  84. GRB 080828: SuperAGILE GRB Localization
  85. SGR 0501+4516: Proximity to supernova remnant HB9
  86. SGR 0501+4516: Swift XRT measure of the spin period
  87. GRB080823: Fermi Gamma-ray Burst Monitor detection
  88. GRB 080824: Fermi Gamma Ray Burst Monitor detection
  89. Konus-Wind observation of GRB 080825B
  90. SGR 0501+4516: Fermi GBM (formerly GLAST Burst Monitor) observations of three exceptionally intense outbursts
  91. GRB 080825B: GRB Localization by SuperAGILE
  92. Konus-Wind observations of new SGR 0501+4516
  93. INTEGRAL ToO Observation of SGR0501+4516
  94. GRB 080822B, Swift-BAT refined analysis
  95. Trigger 321551: Continued Large Flaring of SGR 0501+4516
  96. SGR 0501+4516: optical observations
  97. Swift Trigger 321481: A Large Flare from SGR 0501+4516
  98. GRB 080822B: Swift detection of a burst
  99. GRB080818B: GLAST Burst Monitor detection
  100. New Soft Gamma Repeater 0501+4516 was GRB 080822

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