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"

19610 results found.

  1. GRB 080123: Swift-XRT refined analysis
  2. GRB 080123: Swift/UVOT refined analysis
  3. GRB 080123, Swift-BAT refined analysis
  4. GRB 080123: Enhanced Swift-XRT position
  5. GRB 080123: Swift detection of a short burst
  6. VLA radio upper limit on GRB 080120
  7. GRB 080120: Swift-XRT refined analysis
  8. UVOT detection of GRB080120
  9. GRB 080120: GROND detection
  10. GRB080120: Swift XRT position
  11. Swift UVOT Monitoring of the SN 2008D Brightening (Transient in NGC 2770)
  12. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  13. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  14. XRB 080109/SN 2008D:PAIRITEL NIR observations and t_0 from Swift
  15. XRF 080109 in NGC2770: Detectable Superluminal Motion
  16. XRF in NGC 2770: Search for X-ray periodicity
  17. Refined Swift-XRT analysis of the transient in NGC 2770
  18. Refined Swift UVOT Analysis of SN 2008D (Transient in NGC 2770)
  19. Swift UVOT Observations of the X-ray transient in NGC 2770
  20. Early OT detection of XRF in NGC 2770 in Asiago frames
  21. Bright X-ray Transient in NGC 2770 - A low-luminosity XRF?
  22. GRB 071227: Suzaku WAM observation of the prompt emission
  23. Further Swift-BAT analysis of GRB 071227
  24. Konus-Wind observation of GRB 071227
  25. GRB 071227: Swift-XRT refined analysis
  26. GRB071227: Swift/UVOT refined analysis
  27. Swift-BAT refined analysis of short GRB 071227
  28. GRB 071227: Swift detection of a burst
  29. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  30. Swift-BAT trigger 298308 is not a GRB
  31. GRB 071208?: Swift detection of a possible burst
  32. GRB 071129, Swift-BAT refined analysis
  33. GRB 071129: Swift detection of a burst
  34. GRB 071126: Enhanced Swift-XRT position
  35. VLA radio detection of GRB 071122
  36. GRB071122: Swift/UVOT Observations
  37. GRB 071122, Swift-BAT refined analysis
  38. GRB 071122 Swift XRT position update sent in error.
  39. GRB 071122 Swift-XRT refined analysis
  40. GRB 071122: ROTSE-III Optical Limits
  41. GRB 071122: Swift detection of a burst
  42. Swift/UVOT observations of GRB071118
  43. GRB 071117: Swift-XRT revised position
  44. Konus-Wind and Konus-A observations of GRB 071117
  45. Swift XRT follow-up observations of GRB071008
  46. Swift/UVOT upper limits for GRB 071117
  47. GRB071118: Swift XRT refined analysis
  48. GRB 071118, Swift-BAT refined analysis
  49. GRB 071117: TAROT La Silla observatory optical observations
  50. GRB 071118: Swift detection of a burst
  51. GRB 071117: Swift-XRT refined analysis
  52. GRB 071117, Swift-BAT refined analysis
  53. GRB 071117: Swift/XRT position
  54. GRB 071117: Initial Swift/UVOT observations
  55. GRB 071117: Swift detection of a bright burst
  56. Swift detection of MXB 0656-072
  57. VLA radio upper limit on GRB 071112C
  58. ATCA radio observations of short hard burst GRB 071112B
  59. Correction to the Swift-BAT Transient Identification (trigger=296683)
  60. GRB 071112C: Swift-BAT refined analysis
  61. GRB 071112C: Swift/UVOT observations
  62. GRB 071112C: Swift XRT refined analysis
  63. Swift UVOT upper limits of GRB071112B
  64. GRB 071112B: Swift-XRT preliminary analysis
  65. GRB 071112B, Swift-BAT partial refined analysis of the SHB
  66. Swift-BAT trigger 296491 is not a GRB
  67. GRB 071112C: TAROT Calern observatory optical observations
  68. Swift XRT follow-up observations of GRB071028B
  69. GRB 071112C: ROTSE-III Confirmation of Optical Counterpart
  70. GRB 071112B: ROTSE-III Rapid Optical Limits
  71. GRB 071112C: Swift detection of a burst with an optical counterpart
  72. GRB 071112B: Swift detection of a short hard burst
  73. GRB 071112: Swift detection of a possible burst
  74. VLA IInd observation of INTEGRAL burst GRB 071109
  75. Swift/UVOT initial analysis of GRB071109
  76. GRB 071109: further Swift-XRT analysis
  77. No radio detection at Swift-XRT position
  78. GRB 071109: Swift-XRT possible X-ray counterpart
  79. GRB 071104: Swift-XRT Team Refined Analysis
  80. GRB 071104: Possible Swift UVOT Afterglow Candidate
  81. GRB 071104: Swift-XRT position
  82. Swift XRT and UVOT observations of GRB071028B
  83. GRB 071101, Swift-BAT refined analysis
  84. GRB 071101: Swift-XRT Team refined analysis
  85. GRB 071101: TAROT Calern observatory optical observations
  86. GRB 071101: Swift XRT position
  87. GRB 071101: BOOTES-2 prompt optical observations
  88. GRB 071101: a nearby galaxy
  89. GRB 071101: Swift detection of a burst
  90. GRB 071031, Swift-BAT refined analysis
  91. GRB 071031: Swift/UVOT detection of afterglow
  92. GRB 071031: Swift-XRT Team refined analysis
  93. GRB 071031: Swift detection of a burst with an optical counterpart
  94. GRB 071028B Swift-BAT detection of a burst
  95. Swift UVOT upper limits to GRB071028
  96. GRB 071028: Swift-XRT Team refined analysis
  97. GRB 071028, Swift-BAT refined analysis
  98. GRB 071028: Swift detection of a burst
  99. GRB 071025: Kuiper Telescope Optical Observations
  100. GRB 071018: Revised BAT position

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