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"

45745 results found.

  1. GRB 111215A : Xinglong TNT upper limit
  2. GRB 111215A: Swift detection of a burst
  3. GRB 111201A, the review of the sky area in plate archive
  4. GRB 111212A: GROND observations
  5. GRB 111211A: Swift/UVOT Detection
  6. GRB 111211A: VLT/X-shooter redshift
  7. Konus-Wind observation of GRB 111211A
  8. GRB 111211A: NOT afterglow confirmation
  9. GRB 111212A: Swift-XRT refined Analysis
  10. GRB 111211A: Swift/XRT target of opportunity observation
  11. GRB 111212A: Swift/UVOT Upper Limits
  12. GRB 111212A: Swift-BAT refined analysis
  13. GRB 111212A: Enhanced Swift-XRT position
  14. GRB 111212A: Swift-XRT observations
  15. GRB 111211A: GROND afterglow candidate
  16. GRB 111212A: Swift detection of a burst
  17. GRB 111211A: SuperAGILE localization of a long GRB
  18. GRB 111210A: Xinglong TNT upper limit
  19. GRB 111209A - ATCA 34GHz upper limit
  20. Konus-Wind observation of GRB 111209A
  21. GRB 111210A: GROND observations
  22. GRB 111210A: SDSS prior imaging
  23. GRB 111210A: Swift-XRT refined Analysis
  24. GRB 111210A: MITSuME Okayama Optical upper limits
  25. GRB 111208A: Swift-XRT refined analysis
  26. GRB 111210A: Gemini-North candidate counterpart
  27. GRB 111209A: Rebrightening seen by GROND
  28. GRB111210A: MITSuME Okayama J-band upper-limit
  29. GRB 111210A: Swift/UVOT Upper Limits
  30. GRB 111210A: Enhanced Swift-XRT position
  31. GRB 111210A: Swift-BAT refined analysis
  32. GRB 111210A: Swift detection of a burst
  33. GRB 111209A: IRTF NIR Imaging/Spectroscopy
  34. GRB 111209A: VLT/X-shooter redshift
  35. GRB 111209A: GROND Afterglow observations
  36. GRB 111209A optical limit by "Pi of the Sky"
  37. GRB 111209A: PROMPT optical observations of early afterglow
  38. GRB 111208A: Lightbuckets Optical Observations
  39. GRB 111209A: Swift-XRT refined Analysis
  40. GRB 111209A: Swift UVOT refined analysis
  41. GRB 111209A: Swift Burst of Interest
  42. GRB 111209A, Swift-BAT refined analysis
  43. GRB 111209A: Enhanced Swift-XRT position
  44. GRB111209A : planned XMM-Newton observation
  45. GRB 111209A: TAROT La Silla observatory optical light curve analysis
  46. GRB 111205A: GROND observations
  47. GRB 111209A: Faulkes Telescope North observations
  48. GRB 111209A: REM NIR detection
  49. GRB 111209A: TAROT La Silla observatory optical detection
  50. GRB 111209A: Swift detection of a long burst with an optical counterpart
  51. GRB 111208A: Swift XRT/UVOT observations
  52. GRB 111205A: Swift XRT Observations
  53. GRB 111207A found in ground analysis of BAT data
  54. GRB 111208A found in ground analysis of BAT data
  55. Konus-Wind observation of GRB 111205A
  56. IPN Triangulation of GRB 111205A (long/hard/intense)
  57. GRB 111117A: Refined GMG observation
  58. GRB 111204A: TNG NIR observations
  59. GRB 111201A: GMG optical observation
  60. GRB 111204A: GROND Observations
  61. GRB 111204A: Swift-XRT refined Analysis
  62. GRB 111204A, Swift-BAT refined analysis
  63. GRB 111022B: CrAO optical limit
  64. GRB 111204A: Swift/UVOT Upper Limits
  65. GRB 110921A: optical observations in Maidanak observatory
  66. GRB 111204A: MASTER optical observations
  67. GRB 111123A: optical upper limit in CrAO: correction to the GCN circ. 12613
  68. GRB 111204A: Enhanced Swift-XRT position
  69. GRB 111123A: optical upper limit in CrAO
  70. GRB 111204A: Swift detection of a burst
  71. GRB 111201A: Confirmation of the X-ray afterglow
  72. GRB 111201A: Swift/UVOT Upper Limits
  73. GRB111201A: Swift-XRT observations
  74. GRB 111201A found in ground analysis of BAT data
  75. GRB 111121A: Suzaku WAM observation of the prompt emission
  76. GRB 111129A: Swift/UVOT Detection
  77. GRB 111129A, GROND afterglow observations
  78. GRB 111129A: Swift-XRT refined Analysis
  79. GRB 111126A Circular #12599 erratum
  80. GRB 111129A: Swift-BAT refined analysis
  81. GRB 111129A: Enhanced Swift-XRT position
  82. GRB 111129A: Swift detection of a burst with an optical counterpart
  83. GRB 111126A found in ground analysis of BAT data
  84. GRB 111123A, Swift-BAT refined analysis
  85. GRB 111123A: Swift/UVOT Upper Limits
  86. GRB 111123A - NOT optical observations
  87. GRB 111123A, GROND observations
  88. GRB 111123A: correction to GCN 12593
  89. GRB 111123A: TNG NIR detection of the afterglow candidate
  90. GRB 111123A: Swift-XRT refined Analysis
  91. GRB 111123A: MITSuME Okayama Optical upper limits
  92. GRB 111123A: Enhanced Swift-XRT position
  93. GRB 111123A: GMG optical observation
  94. GRB 111117A: Refined Chandra Astrometry
  95. GRB 111123A: Swift detection of a burst
  96. GRB 111117A, the review of the sky area in plate archives
  97. Konus-Wind observation of GRB 111121A
  98. GRB 111121A: Swift/UVOT Upper Limits
  99. GRB 111121A: Magellan/Megacam observations
  100. GRB 111121A: 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