ASTROSAT CZTI

Data Quality Report

Orbit 20210710_T04_021T01_9000004526_level2

Creation date: 2021-07-12T11:24:59.324680
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/AS1T04_021T01_9000004526cztM0_level2_bc.evt modeM0/AS1T04_021T01_9000004526cztM0_level2_quad_clean.evt
Size (bytes)1,451,136,960470,839,680
Size1.4 GB 449.0 MB
Events in quadrant A6,608,8493,201,069
Events in quadrant B15,633,9383,097,573
Events in quadrant C8,875,0353,013,493
Events in quadrant D10,905,9003,007,500

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0607070
B0912770
C0725530
D0739050

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0600
B0600
C0600
D0600

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05800
B05730
C05780
D05780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A282864981.760588%
B2823613534.791755%
C2824013824.893768%
D282536842.420982%

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 34352 28392 0 0 0.00% 0.00%
B 34358 28376 58 58 0.17% 0.20%
C 34358 28371 22 22 0.06% 0.08%
D 34358 28375 81 81 0.24% 0.29%

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 13 254 50895 136.19 1711 1692 361.3
A 0 226 10995 25.75 1711 1692 361.3
A 12 194 10316 23.87 1711 1692 361.3
B 6 159 7522940 23823.97 1675 1643 315.7
B 0 190 649337 2051.59 1675 1643 315.7
B 5 172 299539 943.6 1675 1643 315.7
C 3 233 2048214 5495.76 1594 1598 372.4
C 0 10 534994 1432.32 1594 1598 372.4
C 2 114 53337 138.93 1594 1598 372.4
D 8 195 3785631 9012.2 1652 1622 419.9
D 12 233 236698 559.87 1652 1622 419.9
D 2 250 226103 534.64 1652 1622 419.9

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