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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"

15407 results found.

  1. Konus-Wind and Konus-RF observations of GRB 090715B
  2. GRB 090715B: Swift/UVOT followup observations
  3. GRB 090715B: break in the optical afterglow decay
  4. GRB 090715B: Observation of the optical afterglow
  5. GRB 090715B: NOT optical observations
  6. Detection of GRB 090618 by RT-2 Experiment onboard the CORONAS-PHOTON Satellite
  7. GRB 090712: Fermi GBM observation
  8. GRB 090713: Fermi GBM detection
  9. GRB 090621B: MTM-500 optical observations
  10. GRB 090709A: deep optical observation with the 10.4m GTC
  11. GRB 090709A: Suzaku WAM observation of the prompt emission
  12. GRB 090709B: Fermi GBM detection
  13. GRB 090709A: confirmation of the periodicity in the SPI-ACS data
  14. Konus-Wind and Konus-RF observations of GRB 090709A
  15. GRB 090709A: P60 Observations
  16. GRB 090709A: Quasiperiodic variations in the BAT light curve
  17. GRB090709A: High Energy BAT/XRT Analysis Suggests Low to Moderate Redshift
  18. GRB 090709A: Wyoming Infrared Observatory NIR upper limits
  19. GRB 090709A, RIMOTS optical upper limits
  20. GRB 090709A - PAIRITEL Discovery of a Red Afterglow
  21. GRB 090709A: Subaru NIR observation
  22. GRB 090708 : Fermi GBM detection
  23. GRB 090626: Suzaku WAM observation of the prompt emission
  24. GRB 090709: PAIRITEL NIR Upper Limits
  25. GRB 090704: Fermi GBM observation
  26. GRB 090704: a long GRB found in INTEGRAL off-line analysis
  27. XRF 090702: a long soft GRB localized with INTEGRAL
  28. GRB 090404: Deep optical imaging and possible host association
  29. GRB 090630: Fermi GBM detection
  30. GRB 090628: Swift/UVOT Upper Limits
  31. Konus-Wind observation of GRB 090626
  32. GRB080628: SAO RAS optical observations
  33. GRB090618: 15GHz radio emission faded
  34. GRB 090628: Swift XRT position
  35. Fermi LAT observations of GRB 090626
  36. GRB 090625B: Fermi GBM observation
  37. GRB 090423: Spitzer observations of the z~8.3 burst
  38. GRB 090623: Suzaku WAM observation of the prompt emission
  39. GRB 090625B: a long GRB localized by INTEGRAL
  40. GRB 090625: Fermi GBM detection
  41. GRB 090618: Correction to GCN 9568
  42. GRB 090617: Suzaku WAM observation of the prompt emission
  43. GRB 090618: Suzaku WAM observation of the prompt emission
  44. GRB 090623: Fermi GBM detection
  45. PAIRITEL observations of GRB 090618
  46. GRB 090621B: I-band observations from 1.23m CAHA
  47. GRB 090621C: Fermi GBM detection
  48. GRB 090621B: P60 Observations
  49. Konus-Wind and Konus-RF observations of GRB 090618
  50. GRB 090621B: RTT150 optical observations
  51. GRB 090621B: Optical Observations
  52. GRB090618, underlying supernova search
  53. GRB090618: OAA-OAUV Optical observations
  54. GRB 090618: Fermi GBM observation
  55. VLA radio detection of GRB 090618
  56. GRB090618 - Continued optical monitoring and light curve break
  57. GRB090618: Swift-XRT team refined analysis
  58. GRB090618: Swift/UVOT bright afterglow detection
  59. GRB 090618: SDSS host detection
  60. GRB 090618: AGILE observations
  61. GRB 090618: LOAO R-band Observation
  62. GRB 090618 Faulkes Telescope North observations
  63. GRB 090618: OA behavior from KAIT
  64. GRB 090610B: Fermi GBM detection
  65. SGR 0418+5729 Fermi/GBM Detection of Pulsations
  66. GRB 090602: Suzaku WAM observation of the prompt emission
  67. GRB 090423: WSRT Radio Observations
  68. Konus-RF observation of SGR burst 090605A
  69. Discovery of a new soft gamma repeater source, SGR 0418+5729
  70. GRB 090530B: Suzaku WAM observation of the prompt emission
  71. GRB 090602: Fermi GBM detection
  72. GRB 090528: Suzaku WAM observation of the prompt emission
  73. GRB 090528B: Suzaku WAM observation of the prompt emission
  74. GRB 090530: Early RAPTOR Optical Observations
  75. GRB090529B: ROVOR Upper Limits
  76. GRB 090531B: Swift/BAT spectral lag results
  77. GRB 090531B, RIMOTS optical upper limits
  78. GRB 090529: MITSuME optical observation
  79. GRB090530: Swift XRT refined analysis
  80. GRB 090528: Fermi GBM detection
  81. GRB 090530: PAIRITEL NIR Detections
  82. GRB090529: UVOT/Swift detection of a brightening optical afterglow
  83. GRB 090520D: Fermi GBM detection
  84. GRB 090522 : Fermi GBM detection
  85. GRB 090518 - NOT upper limit
  86. GRB 090516A: Konus-Wind and Swift/BAT joint spectral analysis
  87. GRB 090516C: Fermi GBM detection
  88. GRB 090423: Fermi GBM T90 follow-up analysis results
  89. GRB 090516: Fermi GBM observation
  90. GRB 090516B: Fermi GBM detection
  91. GRB 090519: NOT refined analysis
  92. GRB 090519: VLT spectroscopic redshift
  93. GRB 090511: Fermi GBM Detection
  94. GRB 090518: P60 Observations
  95. GRB 090518B: Fermi GBM detection
  96. GRB 090516, RIMOTS optical upper limits
  97. GRB090513: Fermi GBM detection
  98. GRB 090515: Swift/BAT spectral lag results
  99. GRB 090516: Swift/UVOT Observations
  100. GRB 090515: Swift/UVOT Observations

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