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"

39383 results found.

  1. GRB 111228A: Swift detection of a burst with an optical counterpart
  2. GRB 111205A: optical observations
  3. GRB 111225A: Swift/UVOT Observations
  4. GRB 111215A: Keck/LRIS Imaging
  5. GRB 111225A: Keck/LRIS Afterglow Photometry
  6. GRB 111222A : Suzaku WAM observation of the prompt emission
  7. GRB 111225A: PAIRITEL NIR Upper Limits
  8. GRB111225A: MITSuME Okayama optical upper limits
  9. GRB 111225A: GRT Optical Observation
  10. GRB 111225A: 1.23m CAHA optical observations
  11. GRB 111225A: Swift-XRT refined Analysis
  12. GRB 111225A, Swift-BAT refined analysis
  13. GRBv111225A: Xinglong TNT optical afterglow
  14. GRB 111225A: Enhanced Swift-XRT position
  15. GRB 111225A: Super-LOTIS early detection
  16. GRB 111225A: TAROT Calern observatory optical detection
  17. GRB 111225A: TAROT Calern observatory optical observations
  18. GRB 111225A: Swift detection of a burst with an optical counterpart
  19. GRB111222A: GMG optical observation
  20. GRB 111222A: Xinglong TNT observation
  21. GRB 111222A: Swift/UVOT Observations
  22. GRB 111222A: Swift-XRT observations
  23. Konus-Wind observation of GRB 111222A
  24. IPN Triangulation of GRB 111222A (short/hard/intense)
  25. GRB 111210A: optical upper limit of Mt. Terskol observatory
  26. Trigger 510075 is not a GRB
  27. GRB 111215A: EVLA observations
  28. XRT GRB Catalogue now live and online
  29. GRB 111103B: optical upper limit
  30. GRB 110820A: optical observations in Maidanak observatory
  31. GRB 111103A: optical upper limit of Mt. Terskol observatory
  32. GRB 111215B: Suzaku WAM observation of the prompt emission
  33. GRB 111211A: optical ovservations at Mt. Terskol observatory
  34. GRB111215A: optical upper limit
  35. GRB 111215B: Swift/UVOT Upper Limits
  36. Konus-Wind observation of GRB 111215B
  37. GRB 111215B: Swift-XRT observations
  38. GRB 111205A: Confirmation of X-ray Afterglow
  39. IPN Triangulation of GRB 111215B (long/intense)
  40. GRB 111215A: WHT, LT and NOT imaging
  41. GRB 111215A: TNG K-band observations
  42. GRB 111215A: MITSuME Okayama Optical upper limits
  43. GRB 111215A: Swift/UVOT Upper Limits
  44. GRB 111215A: Swift-XRT refined Analysis
  45. Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
  46. GRB 111215A: Enhanced Swift-XRT position
  47. GRB 111215A: Swift-BAT refined analysis
  48. GRB 111215A: OSN I-band observations
  49. GRB 111215A: MASTER-Net optical prompt and follow up observations
  50. GRB 111215A, Optical Observations
  51. GRB 111215A: MITSuME Akeno Optical upper limits
  52. GRB 111209A: RAPTOR Limits Before and During the Gamma-ray Emitting Interval
  53. GRB 111215A: GMG optical upper limit
  54. GRB 111215A : Xinglong TNT upper limit
  55. GRB 111215A: Swift detection of a burst
  56. GRB 111201A, the review of the sky area in plate archive
  57. GRB 111212A: GROND observations
  58. GRB 111211A: Swift/UVOT Detection
  59. GRB 111211A: VLT/X-shooter redshift
  60. Konus-Wind observation of GRB 111211A
  61. GRB 111211A: NOT afterglow confirmation
  62. GRB 111212A: Swift-XRT refined Analysis
  63. GRB 111211A: Swift/XRT target of opportunity observation
  64. GRB 111212A: Swift/UVOT Upper Limits
  65. GRB 111212A: Swift-BAT refined analysis
  66. GRB 111212A: Enhanced Swift-XRT position
  67. GRB 111212A: Swift-XRT observations
  68. GRB 111211A: GROND afterglow candidate
  69. GRB 111212A: Swift detection of a burst
  70. GRB 111211A: SuperAGILE localization of a long GRB
  71. GRB 111210A: Xinglong TNT upper limit
  72. GRB 111209A - ATCA 34GHz upper limit
  73. Konus-Wind observation of GRB 111209A
  74. GRB 111210A: GROND observations
  75. GRB 111210A: SDSS prior imaging
  76. GRB 111210A: Swift-XRT refined Analysis
  77. GRB 111210A: MITSuME Okayama Optical upper limits
  78. GRB 111208A: Swift-XRT refined analysis
  79. GRB 111210A: Gemini-North candidate counterpart
  80. GRB 111209A: Rebrightening seen by GROND
  81. GRB 111210A: Swift/UVOT Upper Limits
  82. GRB 111210A: Spectral lag analysis
  83. GRB 111210A: Enhanced Swift-XRT position
  84. GRB 111210A: Swift-BAT refined analysis
  85. GRB 111210A: Swift detection of a burst
  86. GRB 111209A: IRTF NIR Imaging/Spectroscopy
  87. GRB 111209A: VLT/X-shooter redshift
  88. GRB 111209A: GROND Afterglow observations
  89. GRB 111209A optical limit by "Pi of the Sky"
  90. GRB 111209A: PROMPT optical observations of early afterglow
  91. GRB 111208A: Lightbuckets Optical Observations
  92. GRB 111209A: Swift-XRT refined Analysis
  93. GRB 111209A: Swift UVOT refined analysis
  94. GRB 111209A: Swift Burst of Interest
  95. GRB 111209A, Swift-BAT refined analysis
  96. GRB 111209A: Enhanced Swift-XRT position
  97. GRB111209A : planned XMM-Newton observation
  98. GRB 111209A: TAROT La Silla observatory optical light curve analysis
  99. GRB 111205A: GROND observations
  100. GRB 111209A: Faulkes Telescope North observations

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