ASTROSAT CZTI

Data Quality Report

Orbit 35476

Creation date: 2022-04-21T03:27:09.324909
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_095T01_9000005080_35476cztM0_level2.evt modeM0/AS1T04_095T01_9000005080_35476cztM0_level2_quad_clean.evt
Size (bytes)695,021,76094,844,160
Size662.8 MB 90.5 MB
Events in quadrant A2,616,826711,829
Events in quadrant B3,255,480712,112
Events in quadrant C11,433,238419,020
Events in quadrant D3,383,912655,552

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0112103
B0131552
C0376282
D0135932

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0280

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01080
C01080
D01080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5316200.376223%
B53161242.332581%
C5316358467.419112%
D53161562.934537%

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 7077 5317 8 8 0.11% 0.15%
B 7077 5317 71 71 1.00% 1.34%
C 7077 5317 3097 3097 43.76% 58.25%
D 7077 5317 117 117 1.65% 2.20%

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 133539 1056.86 627 615 125.8
A 8 6 15955 121.97 627 615 125.8
A 15 169 15605 119.18 627 615 125.8
B 5 236 403180 3466.7 620 606 116.1
B 5 200 164155 1408.37 620 606 116.1
B 5 172 153222 1314.23 620 606 116.1
C 4 254 9312834 98862.36 409 412 94.2
C 0 10 279107 2958.68 409 412 94.2
C 15 214 152501 1614.6 409 412 94.2
D 2 153 219324 1518.93 599 583 144.0
D 10 118 193329 1338.42 599 583 144.0
D 1 52 186153 1288.59 599 583 144.0

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