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"

45509 results found.

  1. GRB 120803A: Swift-BAT refined analysis
  2. GRB 120803B: FTN possible afterglow candidate
  3. GRB 120803B: Swift detection of a burst
  4. GRB 120803A: Swift detection of a possible burst
  5. GRB 120802A: GRT Optical Observation
  6. GRB 120802A: Swift-XRT refined Analysis
  7. GRB 120802A Gemini-N redshift
  8. GRB 120802A: APEX/LABOCA submm observations
  9. GRB 120729A: Fermi GBM observation
  10. GRB 120802A: Swift-BAT refined analysis
  11. GRB 120802A: Enhanced Swift-XRT position
  12. GRB 120802A: MASTER optical observations
  13. GRB 120802A: optical uper limit in ISON-NM observatory
  14. GRB 120802A: Swift detection of a burst
  15. GRB 120729A: JCMT SCUBA-2 sub-mm observation
  16. GRB 120728B: Fermi GBM detection
  17. Konus-Wind observation of GRB 120728B
  18. GRB 120729A: break in the optical light curve
  19. GRB 120729A: Optical observations from OSN, BOOTES1/2 and IAC80
  20. IPN Triangulation of GRB 120728B (long/intense)
  21. GRB 120729A: RTT150 optical observations
  22. GRB 120729A: EVLA Observations
  23. Virtual Telescope observations of GRB 120729A
  24. GRB 120729A: Early RAPTOR Observations
  25. GRB 120729A: UKIRT Observation
  26. T100 observations of GRB 120729A
  27. GRB 120728A: GROND Afterglow discovery
  28. GRB 120729A: Swift-XRT refined Analysis
  29. GRB 120729A: Swift/UVOT Detection
  30. Swift Trigger 529076 is from Swift J1910.2-0546 and is not a GRB
  31. GRB 120729A: Xinglong TNT optical upper limit
  32. GRB 120729A, Swift-BAT refined analysis
  33. GRB 120728A, Swift-BAT refined analysis
  34. GRB 120729A: Enhanced Swift-XRT position
  35. GRB 120728A: Swift/UVOT Upper Limits
  36. GRB 120729A Gemini-N redshift
  37. GRB 120729A: Swift detection of a burst with an optical afterglow
  38. GRB 120728A: Swift-XRT refined Analysis
  39. GRB 120728A: Enhanced Swift-XRT position
  40. Trigger 529076: Swift possible detection of SwJ1910.2-0546
  41. GRB 120728A: GROND observations
  42. GRB 120728A: Swift detection of a burst
  43. GRB 120727A/Galactic source: Fermi-LAT detection of a transient source
  44. GRB 120716A: optical observation in Maidanak observatory
  45. Swift Trigger 528925 is probably a noise fluctuation
  46. GRB 120722A: optical upper limit
  47. GRB 120724A: optical observation in Maidanak observatory
  48. GRB 120724A: JCMT SCUBA-2 sub-mm observation
  49. GRB 120716A: optical observation in CrAO
  50. GRB 120724A, Swift-BAT refined analysis
  51. GRB 120724A: Swift/UVOT Detection of the Optical Afterglow
  52. GRB 120724A: Enhanced Swift-XRT position
  53. GRB 120724A: Swift-XRT refined Analysis
  54. GRB120711A: Planned XMM-Newton observation
  55. GRB 120724A: Gemini-N tentative redshift
  56. GRB 120724A: FTN optical afterglow candidate
  57. GRB 120724A: Swift detection of a burst
  58. GRB 120709A: Swift re-observation of the field of the X-ray counterpart candidate.
  59. GRB 120722A: Swift/UVOT Upper Limits
  60. GRB 120722A: VLT/X-shooter redshift of the host galaxy
  61. GRB 120722A: GROND detection of the afterglow
  62. GRB 120722A: 1.5m OSN I-band observations
  63. GRB 120722A: Swift-XRT refined Analysis
  64. GRB 120722A: Swift-BAT refined analysis
  65. GRB 120722A: Enhanced Swift-XRT position
  66. GRB 120722A: Correction for GCN circ.13500
  67. GRB 120722A: Xinglong TNT optical afterglow candidate
  68. GRB 120722A: Swift detection of a burst
  69. GRB 120716A: Fermi GBM observation
  70. GRB 120716A: EVLA Detection
  71. GRB 120716A: Swift-XRT detection
  72. GRB 120716A: Swift/XRT position consistent with that of the optical counterpart
  73. GRB 120716A: Redshift confirmation from VLT/X-shooter
  74. VLT/FORS2 redshift of GRB120716A
  75. GRB 120716A: GROND confirmation of the optical/NIR afterglow
  76. GRB 120716A: Typo correction in GCN 13490
  77. GRB 120716A: Optical decay from NOT
  78. GRB 120716A: Candidate Optical Afterglow from PTF
  79. Konus-Wind observation of GRB 120716A
  80. IPN Triangulation of unusual GRB 120716A
  81. Fermi GBM trigger 120716.498 is not a GRB
  82. GRB 120711A: ATCA 34GHz final observations (upper limit)
  83. GRB 120714B: Swift/UVOT Detection
  84. GRB 120714B: Swift-XRT refined Analysis
  85. GRB120714A: Swift/UVOT upper limits
  86. GRB 120714B: Swift-BAT refined analysis
  87. Swift-BAT refined analysis of 1E 1841-045 (Trigger=526660)
  88. GRB 120714A: GROND upper limits
  89. GRB 120714B: GROND confirmation of fading afterglow
  90. GRB 120714B: Redshift from VLT/X-shooter
  91. GRB 120714A: Swift-XRT refined Analysis
  92. Trigger 526660: Swift detection of 1 E 1841-045 (aka Kes 73)
  93. GRB 120624B: VLA Observations
  94. GRB 120714B: Position Correction and Candidate Optical Afterglow
  95. GRB 120714A: Swift-BAT refined analysis
  96. GRB 120714B: Swift detection of a burst
  97. GRB 120714A: Enhanced Swift-XRT position
  98. GRB 120712A: Fermi GBM observation
  99. GRB 120711A: INTEGRAL/SPI observations
  100. GRB120714A: UVOT non-detection

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