ASTROSAT CZTI

Data Quality Report

Orbit 21855

Creation date: 2024-06-27T18:33:04.269170
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/AS1A07_004T01_9000003230_21855cztM0_level2.evt modeM0/AS1A07_004T01_9000003230_21855cztM0_level2_quad_clean.evt
Size (bytes)467,055,36094,504,320
Size445.4 MB 90.1 MB
Events in quadrant A3,487,076618,787
Events in quadrant B3,475,375636,203
Events in quadrant C3,114,898597,943
Events in quadrant D3,650,318580,036

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0144312
B0142532
C0131652
D0148702

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0220
C0220
D0220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6148691.122316%
B6148741.203643%
C6148811.317502%
D6148901.463891%

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 7418 6149 25 25 0.34% 0.41%
B 7418 6149 14 14 0.19% 0.23%
C 7418 6149 0 0 0.00% 0.00%
D 7418 6149 80 80 1.08% 1.30%

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 4 2 201610 1234.09 810 797 162.7
A 2 79 128446 784.46 810 797 162.7
A 5 16 18866 111.04 810 797 162.7
B 15 33 88286 569.67 811 792 153.6
B 0 245 83492 538.46 811 792 153.6
B 3 64 39324 250.88 811 792 153.6
C 14 238 121326 672.72 764 769 179.2
C 5 112 6982 34.67 764 769 179.2
C 10 23 5945 28.88 764 769 179.2
D 7 238 281375 1525.16 767 748 184.0
D 14 35 166088 898.59 767 748 184.0
D 12 233 77804 418.78 767 748 184.0

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