ASTROSAT CZTI

Data Quality Report

Orbit 20924

Creation date: 2024-06-27T18:21:15.620358
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1C04_001T01_9000003082_20924cztM0_level2.evt modeM0/AS1C04_001T01_9000003082_20924cztM0_level2_quad_clean.evt
Size (bytes)1,206,682,560332,968,320
Size1.1 GB 317.5 MB
Events in quadrant A8,405,6642,263,980
Events in quadrant B9,121,5802,250,445
Events in quadrant C8,340,9872,174,389
Events in quadrant D9,456,1742,154,316

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03660
B03660
C03660
D03660

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0374033
B0391083
C0368233
D0405563

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A180361150.637614%
B180361971.092260%
C180361931.070082%
D180373992.212120%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 19926 18039 28 28 0.14% 0.16%
B 19926 18039 33 33 0.17% 0.18%
C 19926 18039 1 1 0.01% 0.01%
D 19927 18040 307 307 1.54% 1.70%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 5 16 250110 584.67 2112 2066 424.2
A 15 174 33946 75.14 2112 2066 424.2
A 0 226 18272 38.2 2112 2066 424.2
B 7 220 317674 791.17 2103 2045 398.9
B 0 229 139949 345.68 2103 2045 398.9
B 0 219 102048 250.67 2103 2045 398.9
C 14 238 315453 668.04 2025 2036 469.2
C 7 247 47020 95.88 2025 2036 469.2
C 10 91 25437 49.88 2025 2036 469.2
D 9 1 584295 1175.57 2055 1996 495.3
D 1 52 324333 650.75 2055 1996 495.3
D 1 20 238164 476.79 2055 1996 495.3

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter