ASTROSAT CZTI

Data Quality Report

Orbit 24856

Creation date: 2024-06-27T19:10:41.673412
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/AS1A08_003T06_9000003636_24856cztM0_level2.evt modeM0/AS1A08_003T06_9000003636_24856cztM0_level2_quad_clean.evt
Size (bytes)611,136,00089,265,600
Size582.8 MB 85.1 MB
Events in quadrant A3,948,786561,338
Events in quadrant B3,781,656572,669
Events in quadrant C5,810,989528,014
Events in quadrant D4,465,357526,134

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0161612
B0155692
C0223452
D0179462

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A74002613.527027%
B74002533.418919%
C74016488.755574%
D74012833.823808%

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 9100 7402 50 50 0.55% 0.68%
B 9100 7402 1 1 0.01% 0.01%
C 9101 7403 280 280 3.08% 3.78%
D 9101 7403 113 113 1.24% 1.53%

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 6 16 214291 1092.27 969 949 195.3
A 13 254 10243 47.58 969 949 195.3
A 3 137 9172 42.1 969 949 195.3
B 12 111 23660 122.09 957 934 186.1
B 11 111 21263 109.21 957 934 186.1
B 14 111 20082 102.87 957 934 186.1
C 7 247 1501047 7168.84 890 897 209.3
C 2 16 693811 3311.26 890 897 209.3
C 14 238 141905 673.84 890 897 209.3
D 1 52 746078 3303.98 928 902 225.5
D 12 218 91419 401.34 928 902 225.5
D 8 195 69466 304.0 928 902 225.5

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