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"

36014 results found.

  1. GRB 110207A: Swift-XRT observations
  2. GRB 110208A: Swift-XRT refined Analysis
  3. GRB 110208A: Enhanced Swift-XRT position
  4. GRB 110208A: Swift-BAT refined analysis
  5. GRB 110208A: Magellan optical observations
  6. GRB 110206A: SMARTS optical/IR afterglow decay
  7. GRB 110208A: Swift detection of a burst
  8. GRB 110205A: optical observations in Mondy observatory
  9. GRB 110207A: Fermi GBM observation
  10. GRB 110205A : HCT optical observations
  11. GRB 110206A: Decay of afterglow candidate
  12. GRB 110206A: SMARTS optical/IR afterglow candidate observations
  13. GRB 110207A: TAROT Calern observatory optical observations
  14. GRB 110205A - Continued PAIRITEL NIR Observations
  15. GRB 110206A: GROND detection of afterglow candidate
  16. GRB 110207A: Swift-BAT refined analysis
  17. GRB 110205A: WSRT radio observation
  18. GRB 110206A: UVOT detection of afterglow candidate
  19. GRB 110207A: MASTER prompt and early optical observations
  20. Konus-Wind observation of GRB 110205A
  21. GRB 110207A: Swift detection of a burst
  22. GRB 110206A: Swift detection of a probable X-ray afterglow
  23. GRB 110206A: TAROT La Silla observatory optical observations
  24. GRB 110205A: Lightbuckets Optical Observations
  25. GRB 110206A: a long GRB detected by INTEGRAL
  26. GRB 110205A : Lulin optical observation
  27. GRB110205A: MITSuME Ishigakijima Optical Observation
  28. GRB110205A: MITSuME Okayama Optical Observation
  29. GRB 110205A: Swift/UVOT Continuing Observations
  30. GRB 110205A: Lulin optical observations and temporal decay index
  31. Observations GRB 110205A
  32. GRB 110205A: Swift-BAT refined analysis
  33. GRB 110205A: Newcastle Observatory Optical Observations
  34. GRB 110205A: Swift-XRT refined Analysis
  35. GRB 110205A: LOAO B/R Observation
  36. GRB 101225A is likely at z~0
  37. GRB 110205A: optical flare confirmation
  38. GRB 110205A: NOT redshift confirmation
  39. GRB 110205A: Enhanced Swift-XRT position
  40. GRB 110205A: FAST Redshift
  41. GRB 110205A: GRAS005 optical observations
  42. GRB 110205A: PAIRITEL NIR Afterglow Detection
  43. GRB 110205A: Possible Lick/Kast redshift
  44. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  45. GRB 110205A: Liverpool Telescope Afterglow Confirmation
  46. GRB 110205A: TAROT Calern observatory detection of an optical flare
  47. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  48. GRB 110205A: TAROT Calern observatory optical detection
  49. GRB 110205A: Swift detection of a burst with an optical candidate
  50. GRB 110128A: Fermi GBM detection
  51. GRB 110201A: Swift-XRT refined Analysis
  52. GRB110201A: MITSuME Okayama optical upper limits
  53. Swift/UVOT observations of GRB110201A
  54. GRB 110201A: Swift-BAT refined analysis
  55. GRB 110201A: MASTER optical observations
  56. GRB 110201A: Swift detection of a burst
  57. GRB110112B: EVLA Observations
  58. GRB101224A: EVLA Observations
  59. GRB110112A: EVLA Observations
  60. GRB110128A: MITSuME Okayama optical upper limits
  61. GRB 110125A: Fermi GBM detection
  62. GRB 101112A: Maidanak and CrAO optical observations
  63. GRB110128A: TNG NIR observations
  64. GRB 110128A, Swift-BAT refined analysis
  65. GRB 110128A: TAROT-Calern refined analysis
  66. GRB 110128A: Swift/UVOT observations
  67. GRB 110128A: Swift-XRT refined Analysis
  68. GRB 110120A: Suzaku WAM observation of the prompt emission
  69. GRB 110128A: WHT redshifts of nearby field galaxies
  70. GRB 110128A: VLT/X-shooter redshift
  71. GRB 110128A: Enhanced Swift-XRT position
  72. GRB 110128A: Afterglow detection from NOT
  73. GRB 110128A: TAROT Calern observatory upper limits
  74. GRB 110128A: Swift detection of a burst
  75. IBAS Alerts n. 6130 and 6131 are not due to a GRB
  76. Konus-Wind observation of GRB 110120A
  77. GRB 110123A: Fermi GBM detection
  78. GRB 110106B, radio observations
  79. GRB 110120A: MASTER optical observations
  80. GRB 110120A: Fermi LAT detection
  81. GRB 101224A, the review of the sky area in plate archives
  82. IPN triangulation of GRB 110120A
  83. GRB 101225A: CQUEAN optical observation
  84. GRB 110106A: CrAO optical observations
  85. GRB 110119A: Fermi GBM detection
  86. GRB 110120A: Fermi GBM detection
  87. GRB 110119A: Suzaku WAM observation of the prompt emission
  88. GRB 110112A: optical upper limit
  89. GRB 110120A: MASTER optical observations
  90. GRB110119: Swift/UVOT Detection
  91. GRB 110119A: Swift-XRT refined Analysis
  92. GRB110119A: MITSuME Okayama optical upper limits
  93. GRB 110119A: Swift-BAT refined analysis
  94. GRB 110119A: PAIRITEL NIR Afterglow Detection
  95. GRB 110119A: Enhanced Swift-XRT position
  96. GRB 110119A: Swift detection of a burst with an optical detection
  97. GRB110106A, mm-radio observations
  98. GRB 101219B: tentative redshift and spectroscopic supernova detection
  99. GRB 101219B: GROND detection of a SN signature
  100. GRB 101219B: correction

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