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"

28269 results found.

  1. GRB 101225A, the review of the sky area in plate archives
  2. OT 110215: Further NIR observations from NOT of the GRB candidate
  3. GRB 110213B: Swift/UVOT observations
  4. Fermi GBM detection of an SGR-like burst
  5. Swift XRT and UVOT Observations of OT 110215
  6. OT 110215: NIR observations from NOT of GRB candidate
  7. GRB 110213A: optical observations in CrAO
  8. GRB 110213B: GROND observations of the optical/NIR afterglow
  9. OT 110215: possible GRB from 2MASS J00264184+8324093
  10. Swift/UVOT observations of GRB110210a.
  11. GRB 110210A: optical upper limit
  12. GRB 110210A: ROVOR Upper Limit
  13. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  14. GRB 110212A: Swift XRT and UVOT observations
  15. GRB 110205A: Konkoly optical observations
  16. GRB 110213B: Swift XRT observation
  17. GRB 110213A: MITSuME Akeno Optical Observation
  18. Konus-Wind observation of GRB 110213B
  19. GRB 110213A: Swift-XRT refined Analysis
  20. GRB110213A: MITSuME Okayama Optical Observation
  21. GRB 110213A: Swift/UVOT refined analysis
  22. GRB 110213A, Swift-BAT refined analysis
  23. GRB 110213A: optical observations
  24. GRB 110213A: Enhanced Swift-XRT position
  25. GRB110212A: MITSuME Okayama optical upper limits
  26. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  27. GRB 110213A: P60 Optical Afterglow Detection
  28. GRB 110213A: Swift detection of a burst with optical afterglow
  29. GRB 110212A: GRT Optical Observation
  30. GRB 110212A, Swift-BAT refined analysis
  31. GRB 110212A: SARA-N Optical Limits
  32. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  33. GRB 110205A: detection of optical linear polarization from CAHA
  34. GRB 110207A: Suzaku WAM observation of the prompt emission
  35. GRB 110210A: Swift-XRT refined Analysis
  36. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  37. GRB 110210A: Swift-BAT refined analysis
  38. Swift-BAT refined analysis of outburst from 1E 1841-04.5
  39. GRB 110210A: Enhanced Swift-XRT position
  40. GRB 110201A: optical observations
  41. GRB 110210A: Swift detection of a burst
  42. Fermi GBM detection of a burst from 1E 1841-045
  43. Swift/UVOT observations of GRB110208a
  44. GRB 110205A: Suzaku WAM observation of the prompt emission
  45. GRB 110207A: Swift-XRT observations
  46. GRB 110208A: Swift-XRT refined Analysis
  47. GRB 110208A: Enhanced Swift-XRT position
  48. GRB 110208A: Swift-BAT refined analysis
  49. GRB 110208A: Swift detection of a burst
  50. GRB 110205A : HCT optical observations
  51. GRB 110206A: Decay of afterglow candidate
  52. GRB 110207A: TAROT Calern observatory optical observations
  53. GRB 110206A: GROND detection of afterglow candidate
  54. GRB 110207A: Swift-BAT refined analysis
  55. Konus-Wind observation of GRB 110205A
  56. GRB 110206A: Swift detection of a probable X-ray afterglow
  57. GRB 110206A: TAROT La Silla observatory optical observations
  58. GRB 110205A: Lightbuckets Optical Observations
  59. GRB 110206A: a long GRB detected by INTEGRAL
  60. GRB110205A: MITSuME Ishigakijima Optical Observation
  61. GRB110205A: MITSuME Okayama Optical Observation
  62. GRB 110205A: Swift/UVOT Continuing Observations
  63. Observations GRB 110205A
  64. GRB 110205A: Swift-BAT refined analysis
  65. GRB 110205A: Newcastle Observatory Optical Observations
  66. GRB 110205A: Swift-XRT refined Analysis
  67. GRB 110205A: LOAO B/R Observation
  68. GRB 110205A: optical flare confirmation
  69. GRB 110205A: NOT redshift confirmation
  70. GRB 110205A: Enhanced Swift-XRT position
  71. GRB 110205A: PAIRITEL NIR Afterglow Detection
  72. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  73. GRB 110205A: TAROT Calern observatory detection of an optical flare
  74. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  75. GRB 110205A: TAROT Calern observatory optical detection
  76. GRB 110205A: Swift detection of a burst with an optical candidate
  77. GRB 110128A: Fermi GBM detection
  78. GRB 110201A: Swift-XRT refined Analysis
  79. GRB110201A: MITSuME Okayama optical upper limits
  80. Swift/UVOT observations of GRB110201A
  81. GRB 110201A: Swift-BAT refined analysis
  82. GRB 110201A: Swift detection of a burst
  83. GRB110112B: EVLA Observations
  84. GRB110112A: EVLA Observations
  85. GRB110128A: MITSuME Okayama optical upper limits
  86. GRB 110125A: Fermi GBM detection
  87. GRB 101112A: Maidanak and CrAO optical observations
  88. GRB110128A: TNG NIR observations
  89. GRB 110128A, Swift-BAT refined analysis
  90. GRB 110128A: Swift/UVOT observations
  91. GRB 110128A: Swift-XRT refined Analysis
  92. GRB 110120A: Suzaku WAM observation of the prompt emission
  93. GRB 110128A: WHT redshifts of nearby field galaxies
  94. GRB 110128A: Enhanced Swift-XRT position
  95. GRB 110128A: Afterglow detection from NOT
  96. GRB 110128A: TAROT Calern observatory upper limits
  97. GRB 110128A: Swift detection of a burst
  98. IBAS Alerts n. 6130 and 6131 are not due to a GRB
  99. GRB 110123A: Fermi GBM detection
  100. GRB 110106B, radio 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