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"

19612 results found.

  1. GRB 080625: Swift/UVOT Detection of an Optical Afterglow
  2. GRB 080623: GROND upper limits
  3. GRB080623: Swift UVOT followup observations
  4. GRB 080623: Swift-XRT refined analysis
  5. GRB 080623, Swift-BAT refined analysis
  6. GRB 080623: Enhanced Swift-XRT position
  7. GRB 080623: TAROT La Silla observatory optical observations
  8. GRB 080623: Swift/UVOT Non-Detection of an Optical Afterglow
  9. GRB 080623: Swift XRT prompt analysis
  10. GRB 080623: Swift detection of a burst
  11. Swift trigger 314975 is not a GRB
  12. Swift-BAT trigger 314975 possible burst
  13. GRB080607: optical observation
  14. GRB 080603b: optical observation
  15. GRB 070809: Putative host galaxy and redshift
  16. Konus-Wind observation of GRB 080613B
  17. GRB 080613A: Swift-XRT detection of the afterglow
  18. GRB080613A: Swift/UVOT Upper Limits
  19. GRB 080613B: GROND Upper Limits
  20. GRB080613B: Swift/UVOT Upper Limits
  21. GRB 080613B, Swift-BAT refined analysis
  22. GRB 080613B: Swift-XRT refined analysis
  23. GRB 080613B: Swift detection of a burst
  24. GRB 080603b: optical observation
  25. Swift observations of BAT Slew Survey event (Trigger=010)
  26. GRB 080603A: final Swift-XRT observations.
  27. GRB 080607: AGILE-MCAL observation of the prompt emission
  28. GRB 080603B - TLS 2nd Epoch: Another Break
  29. GRB 080605: TLS 3rd Epoch - Source Confusion
  30. Konus-Wind observation of GRB 080607
  31. GRB080607: RTT150 optical observations
  32. GRB 080607: Swift-XRT refined analysis
  33. Swift/UVOT Observations of GRB080607
  34. GRB 080605: optical observations
  35. GRB 080607 KAIT observations
  36. Konus-Wind observation of GRB 080605
  37. GRB 080607: Enhanced Swift-XRT position
  38. GRB 080607, Swift-BAT refined analysis
  39. GRB 080605: GROND 2nd epoch observations
  40. GRB 080607: Swift detection of a burst with optical afterglow
  41. GRB 080607: ROTSE-III Detection of Optical Counterpart
  42. GRB 080605: Swift-UVOT refined analysis
  43. GRB 080604: VLA radio upper limit
  44. GRB 080605, Swift-BAT refined analysis
  45. GRB 080603B: VLA radio upper limit
  46. GRB 080605, Swift-BAT refined analysis
  47. GRB 080605: Swift-XRT refined analysis
  48. GRB 080605: MASTER VWF 46 s AT observation
  49. GRB 080605: Enhanced Swift-XRT position
  50. GRB 080605: GROND detection of the optical afterglow candidate
  51. GRB080605: optical observations
  52. GRB 080605: Liverpool Telescope optical afterglow candidate
  53. GRB 080605: Swift/UVOT Position of the Optical Afterglow
  54. GRB 080605: TLS RRM Afterglow
  55. GRB 080605: Swift detection of a burst with an optical afterglow
  56. GRB 080603B: TLS Afterglow Observation
  57. Swift/UVOT observations of GRB080604
  58. GRB 080604, Swift-BAT refined analysis
  59. GRB 080604: Swift-XRT refined analysis
  60. GRB 080603B : Liverpool Telescope Observations
  61. Konus-Wind observation of GRB 080603B
  62. GRB 080603B: Swift-XRT refined analysis
  63. GRB 080603A: Swift-XRT detection of the afterglow
  64. GRB 080603B: Swift/UVOT detection of the afterglow
  65. GRB 080604: Enhanced Swift-XRT position
  66. GRB 080603B, Swift-BAT refined analysis
  67. GRB 080603A: Swift/UVOT detection of the afterglow
  68. GRB080603B: RTT150 optical observations, break in light curves
  69. GRB 080604: Early Super-LOTIS Observations
  70. GRB 080604: Swift detection of a burst with an optical afterglow
  71. GRB 080516: TAROT La Silla observatory optical observations
  72. GRB 080603B: TAROT Calern observatory detection of a plateau in the light curve
  73. GRB 080603B: Swift detection of a burst with optical afterglow
  74. GRB 080603B: ROTSE-III Detection of Optical Counterpart
  75. SGR 1627-41: Chandra/RXTE/Swift Observations Scheduled
  76. GRB 080602, Swift-BAT refined analysis
  77. GRB 080602: Swift-XRT refined analysis
  78. Konus-Wind observation of GRB 080602
  79. GRB 080602: Enhanced Swift-XRT position
  80. GRB 080602: Swift detection of a burst
  81. Swift analysis of BAT Slew Survey event (Trigger=009)
  82. Konus-Wind observation of reactivation of SGR 1627-41
  83. Reactivation of SGR 1627-41
  84. GRB 080524: Swift XRT and UVOT analysis
  85. GRB 080524: Swift-BAT detection of a burst in ground analysis
  86. GRB 080523: Swift-XRT refined analysis
  87. GRB 080523, Swift-BAT refined analysis
  88. Swift/UVOT observations of GRB 080523
  89. GRB 080523: Enhanced Swift-XRT position
  90. GRB 080523: Swift detection of a burst
  91. GRB 80516: Swift/UVOT Observations
  92. GRB 080515: Swift-XRT position and analysis
  93. GRB 080520, Swift-BAT refined analysis
  94. GRB 080514B: pseudo-z= 1.8 from prompt emission spectrum
  95. GRB 080514B: UVOT Observations
  96. GRB080520: Swift/UVOT observations
  97. GRB 080520, GROND observations
  98. GRB 080520: Enhanced Swift-XRT position
  99. GRB 080520: Swift XRT Refined Analysis
  100. GRB 080520: Swift detection of a burst with optical afterglow

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