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"

32707 results found.

  1. GRB 110201A: optical observations
  2. GRB 110206A: Swift-XRT confirmation of the X-ray afterglow
  3. GRB 110208A: Magellan confirmation of the optical afterglow
  4. Fermi GBM detection of a burst from 1E 1841-045
  5. Swift/UVOT observations of GRB110208a
  6. GRB 110205A: Suzaku WAM observation of the prompt emission
  7. GRB 110208A: Potential afterglow from Magellan
  8. GRB 110207A: Swift-XRT observations
  9. GRB 110208A: Swift-XRT refined Analysis
  10. GRB 110208A: Swift-BAT refined analysis
  11. GRB 110208A: Magellan optical observations
  12. GRB 110206A: SMARTS optical/IR afterglow decay
  13. SGR-like outburst from the magnetar 1E 1841-04.5
  14. GRB 110205A: optical observations in Mondy observatory
  15. GRB 110207A: Fermi GBM observation
  16. GRB 110205A : HCT optical observations
  17. GRB 110206A: Decay of afterglow candidate
  18. GRB 110206A: SMARTS optical/IR afterglow candidate observations
  19. GRB 110205A - Continued PAIRITEL NIR Observations
  20. GRB 110206A: GROND detection of afterglow candidate
  21. GRB 110207A: Swift-BAT refined analysis
  22. GRB 110205A: WSRT radio observation
  23. GRB 110206A: UVOT detection of afterglow candidate
  24. GRB110205A: CARMA 3mm Observations
  25. GRB 110207A: MASTER prompt and early optical observations
  26. Konus-Wind observation of GRB 110205A
  27. GRB 110206A: Swift detection of a probable X-ray afterglow
  28. GRB 110205A: Lightbuckets Optical Observations
  29. GRB 110205A : Lulin optical observation
  30. GRB110205A: SMA 1.3mm Observations
  31. GRB 110205A: Swift/UVOT Continuing Observations
  32. GRB 110205A: Lulin optical observations and temporal decay index
  33. GRB 110205A: Swift-BAT refined analysis
  34. GRB 110205A: Newcastle Observatory Optical Observations
  35. GRB 110205A: Swift-XRT refined Analysis
  36. GRB 110205A: LOAO B/R Observation
  37. GRB 101225A is likely at z~0
  38. GRB 110205A: optical flare confirmation
  39. GRB 110205A: NOT redshift confirmation
  40. GRB 110205A: FAST Redshift
  41. GRB 110205A: GRAS005 optical observations
  42. GRB 110205A: PAIRITEL NIR Afterglow Detection
  43. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  44. GRB 110205A: Liverpool Telescope Afterglow Confirmation
  45. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  46. GRB 110128A: Fermi GBM detection
  47. GRB 110201A: Swift-XRT refined Analysis
  48. GRB110201A: MITSuME Okayama optical upper limits
  49. Swift/UVOT observations of GRB110201A
  50. GRB 110201A: Swift-BAT refined analysis
  51. GRB110112B: EVLA Observations
  52. GRB101224A: EVLA Observations
  53. GRB110112A: EVLA Observations
  54. GRB110128A: MITSuME Okayama optical upper limits
  55. GRB 101112A: Maidanak and CrAO optical observations
  56. GRB110128A: TNG NIR observations
  57. GRB 110128A, Swift-BAT refined analysis
  58. GRB 110128A: TAROT-Calern refined analysis
  59. GRB 110128A: Swift/UVOT observations
  60. GRB 110128A: Swift-XRT refined Analysis
  61. GRB 110120A: Suzaku WAM observation of the prompt emission
  62. GRB 110128A: WHT redshifts of nearby field galaxies
  63. GRB 110128A: VLT/X-shooter redshift
  64. GRB 110128A: Afterglow detection from NOT
  65. GRB 110128A: TAROT Calern observatory upper limits
  66. Konus-Wind observation of GRB 110120A
  67. GRB 110106B, radio observations
  68. GRB 110120A: MASTER optical observations
  69. GRB 110120A: Fermi LAT detection
  70. GRB 101224A, the review of the sky area in plate archives
  71. IPN triangulation of GRB 110120A
  72. GRB 101225A: CQUEAN optical observation
  73. GRB 110106A: CrAO optical observations
  74. GRB 110119A: Fermi GBM detection
  75. GRB 110119A: Suzaku WAM observation of the prompt emission
  76. GRB 110112A: optical upper limit
  77. GRB110119: Swift/UVOT Detection
  78. GRB 110119A: Swift-XRT refined Analysis
  79. GRB110119A: MITSuME Okayama optical upper limits
  80. GRB 110119A: Swift-BAT refined analysis
  81. GRB 110119A: PAIRITEL NIR Afterglow Detection
  82. GRB110106A, mm-radio observations
  83. GRB 101219B: tentative redshift and spectroscopic supernova detection
  84. GRB 101219B: GROND detection of a SN signature
  85. GRB 101219B: correction
  86. New feature in Fermi GBM GRB Ground Position Notices
  87. Swift-BAT Trigger 442539 is not a GRB
  88. GRB 110112B: Fermi GBM observation
  89. The Christmas burst GRB 101225A - optical spectroscopy with GTC
  90. GRB 110112B: Swift XRT and UVOT observations of the INTEGRAL burst
  91. GRB 110112A: MITSuME Akeno and Okayama optical upper limits
  92. GRB 110107A: Swift-XRT afterglow confirmation
  93. GRB 101225A: HST observations - no host detected
  94. GRB 101225A: Redshift retraction and results of additional photometric follow-up at the NOT
  95. GRB 110112A: Swift-XRT refined Analysis
  96. GRB 110112A: Swift/UVOT upper limits
  97. GRB 110112A: WHT candidate afterglow/host galaxy
  98. GRB 110112A: Swift-BAT refined analysis
  99. GRB 110106B: MASTER optical observations
  100. GRB110112A: TNT optical afterglow candidate

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