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"

11621 results found.

  1. IPN Triangulation of GRB 171108A (short)
  2. GRB 171103A: Insight-HXMT observation
  3. GRB 171010A: afterglow and SN 2017htp optical observations
  4. GRB 171108A: Fermi GBM detection
  5. Fermi-GBM Trigger 531686417 / 171106778 is not related to ICECUBE-171106A
  6. IceCube-171106A - IceCube observation of a high-energy neutrino candidate
  7. AMON ICECUBE EHE 130214 (close by time to Fermi trigger): MASTER early follow-up observations
  8. GRB 171103A: AstroSat CZTI detection
  9. GRB 171030A: MASTER inspection of the IPN error box of the short GRB.
  10. Konus-Wind observation of GRB 171103A (short/hard)
  11. GRB 171103A: Fermi GBM observation
  12. Fermi GBM detections of Swift J0243.6+6124 and modification of the GBM trigger configuration
  13. Konus-Wind observation of GRB 171102A
  14. IPN Triangulation of GRB 171102A
  15. GRB 171102A: Fermi GBM detection
  16. GRB 171102A: Fermi-LAT detection
  17. GRB 171030A: Fermi GBM detection
  18. GRB 171030A: Swift non-localization with BAT, XRT and UVOT
  19. IPN Triangulation of GRB 171030A (short)
  20. Fermi-GBM triggers due to Swift J0243.6+6124
  21. GRB 171022A: Fermi-LAT detection retraction
  22. AMI-LA observations of the new Be X-ray binary Swift J0243.6+6124
  23. Konus-Wind observation of GRB 171022A
  24. IPN Triangulation of GRB 171022A
  25. GRB 171013B CALET Gamma-Ray Burst Monitor detection
  26. Fermi GBM trigger 530617076/171025401 is not a GRB
  27. Swift trigger 781740: Further analysis from Swift and Fermi/GBM
  28. Numerous Fermi-GBM Subthreshold Notices are due to Swift J0243.6+6
  29. GRB 171022A: Fermi GBM detection
  30. GRB 171022A: Fermi-LAT detection
  31. Fermi GBM Observations of IceCube-171015A
  32. Fermi-GBM Detection of possible burst from AXP CXOU J164710.2-455216/PSR J1647-4552
  33. GRB 171010A: VLA Observations
  34. GRB 171010A: A detection of a radio source by AMI
  35. GRB 171010A : Optical observations from HCT
  36. Konus-Wind observation of GRB 171010A
  37. GRB 171010A: NOT optical observations
  38. GRB 171010B: Fermi GBM detection
  39. GRB 171010B: Swift detection of a burst
  40. GRB 171010A: Fermi GBM observation
  41. GRB 171010A: LCO 1m telescope observations
  42. GRB171010A: AstroSat CZTI detection
  43. GRB 171010A: Swift-XRT afterglow detection
  44. GRB 171010A: optical observations
  45. GRB 171010A: OT, spectrum, and possible host galaxy
  46. GRB 171010A: Swift ToO observations
  47. GRB 171010A: Fermi-LAT detection
  48. GRB 171007A: Fermi GBM observation
  49. Fermi Gamma-ray Burst Monitor trigger 528508320/170930994 is not a GRB
  50. Fermi Gamma-ray Burst Monitor trigger 528330888/170929011 is not a GRB
  51. Further Swift-XRT observations of IceCube 170922A
  52. Fermi-GBM GRB misclassifications
  53. Konus-Wind observation of GRB 170921B
  54. Correction to GCN Circular 21919: GRB 170921C: Insight-HXMT detection
  55. GRB 170921B: AstroSat CZTI detection
  56. GRB 170906A: Insight-HXMT detection
  57. GRB 170921C: Insight-HXMT detection
  58. IPN Triangulation of GRB 170921B
  59. GRB 170921B: Fermi GBM detection
  60. Fermi-GBM GRB misclassifications
  61. GRB 170912C: Insight-HXMT detection
  62. Fermi GBM trigger 527149931/170915272 is not a GRB
  63. Fermi GBM trigger 526978609/170913289 is not a GRB
  64. GRB 170912B: Fermi GBM observations
  65. GRB 170911A: Fermi GBM observation
  66. Konus-Wind observation of GRB 170906A
  67. GRB 170911A: MAXI/GSC detection
  68. GRB 170906A: AstroSat CZTI(Veto) detection
  69. GRB 170830B CALET Gamma-Ray Burst Monitor detection
  70. Fermi-GBM GRB mis-classifications during current Solar activity
  71. GRB 170906B: Fermi GBM detection
  72. GRB 170906A: Fermi GBM detection
  73. GRB 170906A: Fermi-LAT detection
  74. GRB 170903A: Fermi GBM observation
  75. LIGO/Virgo G298389: Fermi GBM Flux Upper Limits
  76. LIGO/Virgo G297595: DECam observations of BBH merger region of interest
  77. LIGO/Virgo G299232/PGWB170825.55: MASTER archive images of the SIWFT/UVOT and MASTER OT J033744.97+723159.0 in NGC1343 galaxy before 25
  78. GRB 170831A: Fermi GBM detection
  79. GRB 170830A: Fermi GBM observation
  80. Konus-Wind observation of GRB 170826A
  81. Konus-Wind observation of GRB 170826B
  82. IPN Triangulation of GRB 170826B
  83. LIGO/Virgo G298048: Konus-Wind observations
  84. GRB 170826B: Insight-HXMT detection
  85. IPN Triangulation of GRB 170827B (short)
  86. IPN Triangulation of GRB 170826A (short)
  87. GRB 170826B: Fermi GBM detection
  88. GRB 170826A: Fermi GBM detection
  89. LIGO/VIRGO G299232: Fermi GBM Observations
  90. LIGO/Virgo G299232 : Fermi-LAT search for high-energy gamma-ray counterpart
  91. LIGO/Virgo G298048: MASTER Global-Net early optical observations and the Possible KiloNova SSS17a in NGC 4993 photometry and merging rate
  92. LIGO/Virgo G298048: Pierre Auger Observatory neutrino follow-up
  93. LIGO/Virgo G298048: INTEGRAL pointed follow-up observations
  94. LIGO/Virgo G298936 : Fermi-LAT search for a high-energy gamma-ray counterpart
  95. LIGO/VIRGO G298936: Fermi GBM Observations
  96. LIGO/Virgo G298048: CALET Observations
  97. Konus-Wind observation of GRB 170816A
  98. LIGO/Virgo G298048: optical observations of CHILESCOPE observatory
  99. LIGO/Virgo G298389 : Fermi-LAT search for a high-energy gamma-ray counterpart
  100. LIGO/Virgo G298389: Fermi GBM Upper Limits

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