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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"

41938 results found.

  1. GRB 160629A: a long GBB detected by INTEGRAL
  2. GRB 160625B: TSHAO optical observations, correction GCN 19619
  3. GRB 160625B: TSHAO optical observations
  4. Konus-Wind observation of GRB 160620A
  5. GRB 160625B CALET Gamma-Ray Burst Monitor detection
  6. GRB 160625B: SMARTS optical/IR afterglow observations
  7. Pi of the Sky detection of an optical flash accompanying GRB 160625B
  8. GRB 160623A: SAO RAS optical observations
  9. Konus-Wind observation of a bright burst from SGR 1935+2154
  10. GRB 160625B: Global MASTER-Net prompt optical emission detection
  11. GRB 160625B: SAO RAS optical observations
  12. GRB 160625B: 15 GHz detection from AMI
  13. GRB 160623A: Possible detection of a radio afterglow at 15 GHz with AMI
  14. GRB 160601A: 15 GHz upper limits from AMI
  15. SGR 1935+2154: AMI 15 GHz upper limits of the magnetar during outburst
  16. GRB 160625B: VLA Detection
  17. GRB 160625B: TSHAO optical observations
  18. Konus-Wind observation of GRB 160625B
  19. GRB 160625B: Mini-MegaTORTORA detection of bright optical flash simultaneous with LAT event
  20. GRB 160625B: RATIR Optical and NIR Observations
  21. GRB 160625B: TNG redshift confirmation
  22. GRB 160625B: VLT/X-shooter redshift
  23. GRB 160625B: MITSuME Ishigakijima Optical Observation
  24. Fermi/GBM observation of a bright burst from magnetar SGR 1935+2154
  25. GRB 160623A CALET Gamma-Ray Burst Monitor detection
  26. Swift-BAT refined analysis on the bright event from SGR 1935+2154
  27. Swift Trigger 701668 is probably not an astrophysical event
  28. IPN Triangulation of GRB 160620A (short/hard)
  29. GRB 160625A: Swift/UVOT Upper Limits
  30. GRB 160625A: Swift-BAT refined analysis
  31. GRB 160625A: Swift-XRT refined Analysis
  32. Trigger 701590: Swift detection of a bright outburst from SGR 1935+2154
  33. GRB 160625B: Swift/UVOT Detection
  34. GRB 160625B: RATIR Optical and NIR Afterglow Detection
  35. GRB 160625B: Fermi GBM refined analysis
  36. GRB 160625B: Fermi-LAT refined analysis
  37. GRB 160625B: Swift-XRT afterglow detection
  38. GRB 160623A: SMA submm afterglow observations
  39. GRB 160625B: Tiled Swift observations
  40. GRB 160625B: Fermi GBM initial observations
  41. GRB 160625B: Fermi-LAT detection of a bright burst
  42. GRB 160625A - two different events?
  43. GRB 160625A: Swift detection of a burst
  44. GRB 160624A: Swift/UVOT Upper Limits
  45. GRB 160624A: Lulin observation
  46. GRB 160623A: TSHAO optical observations
  47. GRB 160624A: Swift-XRT refined Analysis
  48. GRB 160623A: MITSuME Ishigakijima Optical Observation
  49. GRB 160624A: MITSuME Ishigakijima upper limits
  50. GRB 160624A: Fermi GBM observation
  51. GRB 160624A, Swift-BAT refined analysis
  52. GRB 160623A: Swift/UVOT Upper Limits
  53. GRB 160623A: RATIR Optical and NIR Observations, Afterglow Confirmation
  54. GRB160624A:possible GRB host redshift
  55. GRB 160525B: 15 GHz upper limits from AMI
  56. GRB 160521B: 15 GHz upper limits from AMI
  57. GRB 160623A: Mondy optical observations
  58. GRB 160624A: Swift detection of a short burst
  59. Swift detection of a dust-scattered halo around GRB 160623A
  60. GRB 160623A: Swift-XRT afterglow detection
  61. GROND observations of GRB 160622A/SNR RCW 103/SGR 1617-5103
  62. Trigger 701182: Swift detection of SGR 1935+2154
  63. GRB 160623A: Fermi GBM detection/observation
  64. Konus-Wind observation of GRB 160623A
  65. GRB 160623A / Galactic transient: Fermi-LAT detection
  66. GRB 160623A: Swift ToO observations
  67. SGR 1617-5103 (BAT trigger 700791): Enhanced Swift-XRT position.
  68. Swift-BAT refined analysis of the recent outburst from SGR 1617-5103 (a.k.a. 1E 161348-5055 and 2E 1613.5-5053)
  69. Fermi GBM Trigger 160622573 is not a GRB
  70. BAT trigger 700791 (possible GRB 160622A) is SNR RCW 103
  71. GRB 160622A: Swift detection of a possible short GRB or a new SGR
  72. More FERMI GBM bursts from the magnetar SGR 1935+2154
  73. SGR 1935+2154: MAXI/GSC detection
  74. Fermi GBM trigger 488128598/160620637 is not a GRB
  75. Fermi GBM trigger 487974449/160618852 is not a GRB
  76. LIGO/Virgo G211117 / GW151226: Sky maps and other data available in LOSC
  77. LIGO/Virgo G197392 / LVT151012: Sky maps and other data available in LOSC
  78. LIGO/Virgo G211117/GW151226: serendipitous XMM-Newton slew observations
  79. Konus-Wind observation of GRB 160612A
  80. GRB 160612A: Swift-XRT observations
  81. BAT detection and localization of GRB 160612A
  82. GRB 160612A: Swift ToO observations
  83. IPN Triangulation of GRB 160612A (short/hard)
  84. GRB 160521A: 15 GHz detections and upper limit from AMI
  85. GRB 160519A: 15 GHz upper limits from AMI
  86. GRB 160509A: 15 GHz upper limits from AMI
  87. GRB 160612A: Fermi GBM detection
  88. GRB 160611A: Swift/UVOT observations
  89. GRB 160611A: Swift-BAT refined analysis
  90. GRB 160611A: Swift-XRT refined Analysis
  91. GRB 160611A: GCN19525 OT is known star
  92. GRB160611.9 MASTER-Net OT detection
  93. GRB 160611A: Swift-XRT observations
  94. GRB 160611A: Swift detection of a burst
  95. SWIFT J174540.2-290037, Swift-BAT refined analysis (trigger 690197)
  96. GRB 160525C: Astrosat CZTI detection
  97. GRB 160508A: Astrosat CZTI detection
  98. SWIFT J174540.2-290037, Swift-BAT refined analysis (trigger 689956)
  99. GRB 160607A CALET Gamma-Ray Burst Monitor detection
  100. Swift detection of SWIFT J174540.2-290037

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