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"

36211 results found.

  1. GRB 080212: Swift detection of a burst
  2. IPN localization of GRB 080211
  3. GRB 080212: DSS/2MASS Galaxy at XRT position
  4. GRB 080207: VLT NIR early upper limits
  5. GRB 080210: Swift/UVOT Refined Analysis
  6. GRB 080207: optical observations.
  7. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  8. GRB 080210, Swift-BAT refined analysis
  9. GRB 080210: Super-LOTIS observations
  10. GRB 080210: Swift-XRT Refined Analysis
  11. GRB 080210: VLT redshift
  12. GRB 080210: Enhanced Swift-XRT position
  13. GRB 080210: Rapid PROMPT Detections
  14. GRB 080210: GOND detection in all bands and redshift upper limit
  15. GRB080210 - SDSS Pre-Burst Observations
  16. GRB 080210: Swift detection of a burst with optical afterglow
  17. GRB 080210: TAROT La Silla observatory optical detection
  18. GRB 080207: GROND upper limits
  19. GRB 080205: GAO 150cm telescope Optical limit
  20. GRB 080207, Swift-BAT refined analysis
  21. GRB 080207: Optical limits from Gemini-South
  22. GRB 080205: RTT150 optical observations
  23. GRB 080207: Super-LOTIS observations
  24. GRB 080207, Swift-BAT refined analysis
  25. Swift Trigger 302777 is not a GRB
  26. GRB080207: RTT150 Optical Observations
  27. GRB 080207: REM NIR observations
  28. GRB 080207: TAROT Calern observatory optical observations
  29. GRB 080207: Swift-XRT Refined Analysis
  30. GRB 080207: Enhanced Swift-XRT position
  31. GRB 080207: Swift detection of a burst
  32. Konus-Wind observation of GRB 080204
  33. GRB 080205 optical upper limit
  34. GRB 080205: MASTER optical observation
  35. GRB 080205: optical observation
  36. VLA radio upper limit on GRB 080205
  37. INT+WFC R-band observations of GRB 080205
  38. GRB 080205, Swift-BAT refined analysis
  39. IPN localization of very hard GRB 080204
  40. GRB 080205: Swift XRT refined analysis
  41. GRB 080205: OA evolution from KAIT observations
  42. GRB 080205: Swift/UVOT observations
  43. GRB 080205: Enhanced Swift-XRT position
  44. GRB 080205: KAIT OA detection
  45. GRB 080205: Swift detection of a burst
  46. GRB 080130: Swift-BAT refined analysis
  47. GRB 080130: further Swift XRT observations confirm fading source
  48. GRB 080129: Swift/UVOT Refined Upper Limits
  49. GRB 080130: REM NIR observations
  50. GRB 080130(?): Swift XRT observation
  51. GRB 080130?: Detection of a possible burst by BATSS
  52. GRB 080129: Optical observations from OSN
  53. GRB 080129: Swift-XRT refined analysis
  54. GRB 080129: KAIT optical limits
  55. GRB 080123: Early afterglow detection with BATSS (BAT Slew Survey)
  56. GRB 080129: optical limit by Pi of the Sky
  57. GRB 080129, Swift-BAT refined analysis
  58. GRB 080129: TAROT La Silla observatory optical observations
  59. GRB 080129: Gemini-South photometry
  60. GRB 080129: GROND detection in all bands, and fading
  61. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  62. GRB 080129: Enhanced Swift-XRT position
  63. GRB 080129: Gemini-South Imaging Observations
  64. GRB 080129: Swift XRT position
  65. GRB 080129 (?): UVOT Upper Limits
  66. GRB 080129 (?): Swift detection of a possible burst
  67. A new website of high-level data products for Swift GRBs
  68. GRB 080121: Upper limit on X-ray afterglow
  69. GRB 080123 : Suzaku WAM observation of the prompt emission
  70. Swift trigger(=301779) is not a GRB
  71. GRB 080122: pseudo-z= 1.93 from prompt emission spectrum
  72. Konus-Wind observation of GRB 080122
  73. GRB 080122 : Suzaku WAM observation of the prompt emission
  74. GRB 080121: Swift/UVOT upper limits
  75. SNe 2008D and 2007uy: Chandra Detections
  76. GRB 080121 position was incorrect
  77. GRB 080121: Enhanced Swift-XRT position
  78. IPN triangulation of GRB080122
  79. GRB 080121: Nearby SDSS galaxies
  80. GRB 080121: Swift-BAT detection of a very weak, short burst
  81. GRB 080123: Swift-XRT refined analysis
  82. GRB 080123: Swift/UVOT refined analysis
  83. X-ray transient in NGC 2770: RTT150 optical observations
  84. GRB 080123, Swift-BAT refined analysis
  85. GRB 080123: Enhanced Swift-XRT position
  86. GRB 080123: Swift detection of a short burst
  87. GRB 080120: GROND confirmation of the optical afterglow
  88. VLA radio upper limit on GRB 080120
  89. GRB 080120: Swift-XRT refined analysis
  90. GRB 080120: GROND detection
  91. GRB 080120 : Planned XMM-Newton observation
  92. GRB080120: Swift XRT position
  93. GRB 080120: a long GRB detected by INTEGRAL
  94. XRF 080109 / SN 2008D: spectroscopic evolution
  95. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  96. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  97. XRF 080109 in NGC2770: Detectable Superluminal Motion
  98. Detailed Spectroscopic ID of SN 2008D (Transient in NGC 2770)
  99. Transient in NGC 2770: spectroscopic evidence for a SN
  100. Bright X-ray transient / possible XRF in NGC 2770: TNG R imaging

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