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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"

24590 results found.

  1. GRB 180718B: Swift-XRT observations
  2. GRB 180722B: CALET Gamma-Ray Burst Monitor detection
  3. GRB 180723.13: MASTER optical observation of the short Fermi GBM trigger number 554008254
  4. GRB 180722A: MASTER second inspection
  5. GRB 180723.76: MASTER optical observation of the bright long Fermi GBM trigger number 554062193
  6. GRB 180720B: MASTER Global Net OT observations
  7. GRB 180721A: MITSuME Akeno optical upper limits
  8. GRB 180720B: REM photometry
  9. GRB 180720B: ISON-Castelgrande optical observations
  10. Konus-Wind observation of GRB 180720B
  11. FRB 180714: MASTER optical inspection of the Fast Rado Burst Transient
  12. GRB 180720C: MASTER optical observation
  13. ANTARES neutrino Alert180713.02: MASTER optical observation
  14. Fermi Trigger 553879512: MASTER optical observation
  15. GRB 180722A: MASTER optical observation
  16. GRB 180720B: MITSuME Ishigaki optical observations
  17. GRB 180721A: Swift-BAT refined analysis
  18. GRB 180720C: Swift-BAT refined analysis
  19. GRB 180720B: Swift-BAT refined analysis
  20. GRB 180721A: LCO Haleakala observations
  21. GRB 180720C: LT observations
  22. GRB 180720C: Fermi GBM observation
  23. GRB 180706A: OSN detection
  24. GRB 180720B: LCO optical afterglow observations
  25. GRB 180720B: OSN detection, fading slower?
  26. GRB 180720B: Swift-XRT refined Analysis
  27. GRB 180720B: MITSuME Akeno optical observations
  28. GRB 180720C: Swift detection of a burst or possible Galactic Transient
  29. GRB 180720B: Fermi GBM observation
  30. GRB 180720B : Fermi-LAT detection
  31. GRB 180720B : TSHAO optical observations
  32. GRB 180715A: MASTER optical observation
  33. GRB 180720B: LCO Haleakala possible bright optical candidate
  34. GRB 180720A: Fermi GBM observation
  35. GRB 180718A: MASTER optical observation
  36. GRB 180718B: MASTER optical observation
  37. GRB180715B: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 553369644)
  38. GRB 180718B: Fermi GBM detection
  39. GRB 180716A: CALET Gamma-Ray Burst Monitor detection
  40. GRB 180718B: Fermi-LAT detection
  41. GRB 180718A: Fermi GBM detection
  42. Trigger 848584: Swift detection of AX 1631.9-4752
  43. GRB 180715A: CALET Gamma-Ray Burst Monitor detection
  44. GRB 180715A: LCO Sutherland observations
  45. GRB 180715A: Swift-XRT observations
  46. GRB 180715A: Fermi GBM detection
  47. GRB 180715A: Swift-BAT refined analysis
  48. GRB 180715A: LCO Sutherland possible optical candidate
  49. GRB 180715A: Swift detection of a short hard burst
  50. GRB180714A: a long GRB detected by INTEGRAL
  51. IceCube-171106A: MASTER optical observation
  52. GRB 180703A: optical afterglow confirmation
  53. GRB 180711A: CALET Gamma-Ray Burst Monitor detection
  54. IceCube-170922A: First Optical observations of the Neutrino Trigger by MASTER Global Net and 25 IceCube alerts inspection.
  55. GRB 180705A: OSN observations
  56. GRB 180709A: Swift-BAT refined analysis
  57. GRB 180709A: Optical limits
  58. GRB 180703B: further analysis of CGBM data
  59. Trigger 846740: Swift trigger near NGC5055
  60. Konus-Wind observation of GRB 180703A
  61. GRB 180703A: MASTER optical observation
  62. GRB 180706A: Swift-BAT refined analysis
  63. GRB 180706A: Fermi GBM observation
  64. Konus-Wind observation of GRB 180704A
  65. GRB 180706A: Swift-XRT refined Analysis
  66. Konus-Wind observation of GRB 180701A
  67. Konus-Wind observation of GRB 180703B
  68. GRB 180706A: Swift detection of a burst with optical counterpart
  69. GRB 180705A: Swift-BAT refined analysis
  70. GRB 180705A: Swift-XRT observations
  71. GRB 180705A: Swift detection of a burst
  72. GRB 180704B: CALET Gamma-Ray Burst Monitor detection
  73. GRB 180703B: Fermi GBM detection
  74. GRB 180703A: Fermi GBM detection
  75. GRB 180704A: Swift-BAT refined analysis
  76. GRB 180703A: LCO Sutherland possible optical candidate
  77. GRB 180703A: Swift-XRT observations
  78. GRB150101B: INTEGRAL prompt gamma-ray signal from a possible GRB170817A-analogue
  79. GRB 180704A: MASTER optical observation
  80. GRB 180704A: Swift detection of a burst
  81. GRB 180703B: Fermi-LAT detection
  82. GRB 180703A: Fermi-LAT detection
  83. GRB 180630A: Swift-BAT refined analysis
  84. GRB 180630A: Fermi GBM detection
  85. GRB 180626C / Fermi trigger 551697835: MASTER inspection
  86. GRB 180630A: Swift detection of a burst with an optical counterpart
  87. GRB 180626C: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 551697835)
  88. Konus-Wind observation of GRB 180626A
  89. Konus-Wind observation of GRB 180626C
  90. GRB 180624A: NOT optical counterpart
  91. Konus-Wind observation of GRB 180626B
  92. IPN Triangulation of GRB 180626C (short)
  93. IPN Triangulation of GRB 180626B (short)
  94. GRB 180626A: Swift-BAT refined analysis
  95. GRB 180626A: KAIT Optical Upper Limit
  96. GRB 180624A: LCO Haleakala observations
  97. Konus-Wind observation of GRB 180623A
  98. GRB 180626A: LCO Haleakala observations
  99. GRB 180626A: A long GRB detected by INTEGRAL
  100. GRB 180623B: CALET Gamma-Ray Burst Monitor detection

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