ASTROSAT CZTI

Data Quality Report

Orbit 35938

Creation date: 2022-06-09T03:28:36.449001
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/AS1A11_080T01_9000005146_35938cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35938cztM0_level2_quad_clean.evt
Size (bytes)446,166,72074,842,560
Size425.5 MB 71.4 MB
Events in quadrant A2,645,094493,199
Events in quadrant B4,336,809452,572
Events in quadrant C2,960,117481,235
Events in quadrant D3,202,457460,200

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300
B0300
C0300
D0310

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0113013
B0163592
C0121132
D0131622

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A541290.166297%
B541265312.065780%
C5412921.699926%
D5412711.311899%

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 7144 5413 4 4 0.06% 0.07%
B 7144 5413 522 522 7.31% 9.64%
C 7144 5413 72 72 1.01% 1.33%
D 7144 5413 47 47 0.66% 0.87%

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 10 83 166839 1283.67 632 622 129.5
A 8 144 17818 132.8 632 622 129.5
A 7 3 8746 62.74 632 622 129.5
B 5 172 1850154 16254.39 591 576 113.8
B 4 171 74820 652.47 591 576 113.8
B 5 255 26340 226.42 591 576 113.8
C 15 214 227031 1592.58 607 612 142.2
C 0 207 205949 1444.3 607 612 142.2
C 0 10 154855 1084.91 607 612 142.2
D 8 195 474107 3222.47 604 590 146.9
D 13 249 172793 1171.91 604 590 146.9
D 1 52 75252 508.1 604 590 146.9

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