Skip to main content
JSON Notices via Email, Kafka Cron Jobs, Submitter Profile, GCN is Hiring. See news and announcements

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"

11790 results found.

  1. GRB 180311A: Swift detection of a burst
  2. Trigger 813449: Swift detection of large burst from XTE J1701-407
  3. Konus-Wind observation of GRB 180305A
  4. GRB 180305A: Fermi-LAT detection
  5. Konus-Wind observation of GRB 180223A
  6. Swift Trigger 811686 is probably not an astrophysical source.
  7. GRB 180224A: Swift-XRT refined Analysis
  8. GRB 180222A: A long GRB detected by INTEGRAL
  9. Swift Trigger 811167: Detection of MAXI J1813-095
  10. GRB 180205A: Mondy optical observations
  11. Swift Trigger 811074: possible GRB 180221A
  12. Konus-Wind observation of GRB 180218A
  13. IPN Triangulation of GRB 180218A (long/bright)
  14. Konus-Wind observation of GRB 180210A
  15. GRB 180210A: Swift-XRT afterglow detection
  16. GRB 180210A: Fermi-LAT detection
  17. GRB180205A: Optical observations with DOAO 1m telescope
  18. Fermi-GBM Detection of possible burst from AXP CXOU J164710.2-455216/PSR J1647-4552
  19. GRB 180205A: Swift-XRT refined Analysis
  20. Konus-Wind observation of GRB 180204A
  21. GRB 180205A: KAIT optical afterglow confirmation
  22. GRB 180120A: Fermi GBM Detection
  23. GRB 180120A CALET Gamma-Ray Burst Monitor detection
  24. Konus-Wind observation of GRB 171209A
  25. GRB 180115A: Swift/UVOT Detection
  26. Konus-Wind observation of GRB 180113B
  27. IPN Triangulation of GRB 180113B
  28. Konus-Wind observation of GRB 180113C
  29. e-MERLIN detection of GRB 171205A
  30. GRB 180116A: MAXI/GSC detection
  31. GRB 180115A: Redshift from OSIRIS/GTC
  32. Konus-Wind observation of GRB 180113A
  33. GRB 180115A: Swift-XRT refined Analysis
  34. Konus-Wind observation of GRB 180111A
  35. GRB 180113A: Swift detection of a burst
  36. GRB 180111A: Swift-XRT refined Analysis
  37. GRB180111A: Xinglong TNT possible optical detection
  38. GRB 180111A: Swift detection of a burst with an optical counterpart
  39. Konus-Wind observation of GRB 180103A
  40. Fermi GBM Trigger 537135776/180108849 is not a GRB
  41. GRB 180102A: MASTER-Net robotic report
  42. GRB 180102A: Swift-XRT refined Analysis
  43. GRB 180102A: Swift detection of a burst
  44. Konus-Wind observation of GRB 171227A
  45. Konus-Wind observation of GRB 171216B
  46. IceCube-171106A: Konus-Wind upper limits
  47. IceCube-170922A: Konus-Wind upper limits
  48. GRB 171222A: Swift-XRT refined Analysis
  49. GRB 171216A: Swift detection of a burst
  50. Swift Trigger 797070: KAIT Optical Observations
  51. GRB 171212B: Fermi-LAT detection
  52. Konus-Wind observation of GRB 171210A
  53. GRB 171211A: Swift-XRT refined Analysis
  54. GRB 171210A: Swift-XRT and UVOT observations
  55. GRB 171211A: Swift detection of a possibly short burst
  56. GRB 171209A: Lulin 1m telescope observations
  57. GRB 171210A: Fermi-LAT detection
  58. Konus-Wind observation of GRB 171205A
  59. GRB 171205A: Mondy optical observations
  60. GRB 171120A CALET Gamma-Ray Burst Monitor detection
  61. GRB 171205A: MASTER-SAAO optical observations of unusual OT
  62. Possible blackbody component in the X-ray spectrum of GRB171205A
  63. GRB 171205A: Swift-XRT refined Analysis
  64. GRB 171205A: Swift detection of a burst
  65. Pan-STARRS follow-up of IceCube-171106A
  66. LIGO/Virgo G299232: LOFAR follow-up
  67. INTEGRAL pointed follow-up of IceCube-171106A
  68. GRB 171124A: Fermi-LAT detection
  69. GRB 171123A: Swift-BAT refined analysis
  70. GRB 171123A: Swift-XRT refined Analysis
  71. GRB 171120A: Insight-HXMT detection
  72. GRB 171123A: Swift detection of a burst
  73. Konus-Wind observation of GRB 171119A
  74. GRB 171120A: Xinglong-2.16m optical upper limit
  75. GRB 171120A: AstroSat CZTI detection
  76. Konus-Wind observation of GRB 171120A
  77. GRB 171120A: MITSuME Akeno optical upper limits
  78. GRB 171120A: Fermi GBM Detection
  79. GRB 171120A: Swift-XRT refined Analysis
  80. GRB 171120A: Fermi-LAT detection
  81. GRB 171120A: Swift detection of a burst
  82. Fermi-LAT Gamma-ray Observations of IceCube-171106A
  83. GRB 171115A: Swift detection of a burst
  84. GRB 171112A: Fermi GBM Detection
  85. Konus-Wind observation of GRB 171112A
  86. Konus-Wind observation of GRB 171108A
  87. GRB 171112A: MAXI/GSC detection
  88. HAWC follow-up of IceCube-171106A
  89. GRB 171010A: afterglow and SN 2017htp optical observations
  90. GRB 171030A: MASTER inspection of the IPN error box of the short GRB.
  91. Konus-Wind observation of GRB 171103A (short/hard)
  92. GRB 171103A: Swift-BAT refined analysis of a short GRB
  93. Konus-Wind observation of GRB 171102A
  94. GRB 171102B: Swift detection of a burst
  95. GRB 171102A: Fermi-LAT detection
  96. GRB 171030A: IPN error box through NSs probability merging rate map
  97. Swift Trigger 783893: KAIT Optical Observations
  98. GRB 171027A: KAIT Optical Upper Limit
  99. GRB 171022A: Fermi-LAT detection retraction
  100. Konus-Wind observation of GRB 171027A

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
Want to contribute code to GCN?
Get involved on GitHub.

gcn.nasa.gov

A service of the Astrophysics Science Division at NASA Goddard Space Flight Center

Looking for U.S. government information and services? Visit USA.gov