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"

27576 results found.

  1. GRB 130605A: Swift detection of a burst
  2. Konus-Wind observation of GRB 130603B
  3. GRB 130603B: MASTER-Net early observations and optical sloap limit
  4. GRB 130603B: AMI-LA 15GHz observations
  5. GRB 130604A: Swift/UVOT Upper Limits
  6. Swift Trigger 557466 is probably not real.
  7. GRB 130604A: Swift-XRT refined Analysis
  8. GRB 130604B: Fermi GBM detection
  9. GRB 130603B: RATIR Optical and NIR Observations
  10. GRB 130604A: Gemini North Spectroscopy
  11. GRB 130603B: P60 Observations
  12. GRB130603B: Swift/UVOT detection
  13. GRB 130604A: ISON-NM optical upper limit
  14. GRB 130604A: Swift detection of a burst
  15. GRB 130603B: Swift-XRT refined Analysis
  16. GRB 130603B: Swift-BAT Spectral lag analysis
  17. GRB 130603B: Magellan redshift confirmation
  18. GRB 130603B: Swift-BAT refined analysis
  19. GRB 130603A: Swift-XRT refined Analysis
  20. Swift/UVOT observations of GRB130603A
  21. GRB 130603A: Swift-BAT refined analysis
  22. GRB 130603B: Swift detection of a bright short burst
  23. GRB 130603A: Swift-XRT observations
  24. GRB 130603A: Swift detection of a burst
  25. GRB 130529A: GROND upper limits
  26. GRB 130528A: Fermi GBM detection
  27. GRB 130529A: Swift/UVOT Upper Limits
  28. GRB 130527A: Suzaku WAM observation of the prompt emission
  29. GRB 130529A: Swift-BAT refined analysis
  30. GRB 130518A: Suzaku WAM observation of the prompt emission
  31. GRB 130529A: Swift-XRT refined Analysis
  32. Konus-Wind observation of GRB 130528A
  33. GRB 130528A: Swift/UVOT Upper Limits
  34. Konus-Wind observation of GRB 130527A
  35. GRB 130528A: Swift-BAT refined analysis
  36. GRB 130529A: Swift detection of a burst
  37. GRB 130528A: Swift-XRT refined Analysis
  38. GRB 130527A: Swift/UVOT Upper Limits
  39. GRB 130521A: Skynet/PROMPT detection of an extremely red afterglow
  40. GRB 130528A: optical upper limit
  41. GRB 130528A: Swift detection of a burst
  42. GRB 130527A: RATIR Optical and NIR Observations
  43. GRB 130527A: Swift-BAT refined analysis
  44. GRB 130527A: Swift-XRT refined Analysis
  45. GRB 130527A: Swift detection of a bright burst
  46. GRB 130514A: Konus-Wind and Swift/BAT joint spectral analysis
  47. Swift Trigger 556533 is not an astrophysical event
  48. Swift Trigger 556533 is probably not an astrophysical event
  49. GRB 130521A: Skynet/PROMPT observations
  50. GRB 130514B: Further Swift-XRT Observations
  51. GRB 130518B, Swift-BAT refined analysis
  52. GRB 130521A, Swift-BAT refined analysis
  53. GRB 130521A: TAROT La Silla observatory optical observations
  54. GRB 130521A: Swift detection of a burst
  55. Swift XRT observation of GRB 130518B
  56. GRB 130515A: Suzaku WAM observation of the prompt emission
  57. GRB 130518A: Continued RATIR Optical Observations - Fading
  58. Correction to GCN Circular 14682 (GRB 130518B)
  59. GRB 130518B found in ground analysis of Swift-BAT data
  60. GRB 130518A: Confirmation of the X-ray afterglow.
  61. GRB 130518A: P60 Afterglow Observations
  62. GRB 130518A: RATIR Optical and NIR Observations
  63. GRB 130518A: Swift XRT and UVOT possible afterglow
  64. Konus-Wind observation of GRB 130518A
  65. GRB 130518A Swift-BAT position from ground analysis
  66. GRB 130518A: Fermi LAT detection
  67. GRB 130518A: Fermi GBM detection
  68. GRB 130515A: IRSF NIR Observation
  69. GRB 130515A: Further Gemini Observations
  70. Konus-Wind observation of GRB 130515A
  71. GRB 130514B: RATIR Optical and NIR Observations
  72. Fermi GBM trigger 390275038 / 130515072 is not a GRB
  73. GRB 130515A: Fermi GBM detection
  74. GRB 130427A: Skynet detections of a possible supernova
  75. GRB 130515A: Swift-XRT refined Analysis
  76. GRB 130515A: Swift/UVOT Upper Limits
  77. GRB 130514B Swift-BAT observations
  78. GRB 130515A: Swift-BAT refined analysis
  79. GRB 130514B: GROND observations
  80. GRB 130515A: Gemini/GMOS Observations
  81. GRB 130515A: GROND Observations
  82. GRB 130511A: SSO 2.3m observation
  83. GRB 130514B: Swift-XRT Observations
  84. GRB 130515A: Swift detection of a short burst
  85. GRB 130514A: Swift-XRT refined Analysis
  86. GRB 130514A: Skynet/PROMPT/DSO Detections
  87. GRB 130513A: Bassano Bresciano optical upper limit
  88. GRB 130427A: optical observations
  89. GRB 130514A: RATIR Optical and NIR Observations
  90. GRB 130513A: RATIR Optical and NIR Observations
  91. GRB 130513A: Swift/UVOT Upper Limits
  92. GRB 130514A: Swift/UVOT Upper Limits
  93. GRB 130513A: GROND observations
  94. GRB 130514A: Swift-BAT refined analysis
  95. GRB 130513A: Swift-XRT detection of the afterglow.
  96. GRB 130514A: GROND optical-NIR afterglow discovery and photo-z
  97. GRB 130514A: P60 Observations
  98. GRB 130514A: Swift detection of a burst
  99. GRB130511A: SOAO Optical Observation
  100. GRB 130511A: Swift-XRT refined Analysis

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