ASTROSAT CZTI

Data Quality Report

Orbit 20201101_C05_019T04_9000003956_level2

Creation date: 2021-01-07T15:59:20.018177
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1C05_019T04_9000003956cztM0_level2_bc.evt modeM0/AS1C05_019T04_9000003956cztM0_level2_quad_clean.evt
Size (bytes)3,889,535,0401,636,260,480
Size3.6 GB 1.5 GB
Events in quadrant A21,768,26910,970,566
Events in quadrant B25,025,69311,078,764
Events in quadrant C22,369,40710,598,379
Events in quadrant D41,874,22210,114,505

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020200
B020200
C020200
D020200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02083150
B02210800
C02141320
D02817450

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9921213771.387937%
B9921225782.598476%
C9921223202.338427%
D9921261396.187760%

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 111895 99201 62 62 0.06% 0.06%
B 111895 99200 30 30 0.03% 0.03%
C 111895 99203 18 18 0.02% 0.02%
D 111895 99201 1010 1010 0.90% 1.02%

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 15 174 1080693 953.55 5263 5184 1127.9
A 4 2 341657 298.32 5263 5184 1127.9
A 13 254 151365 129.6 5263 5184 1127.9
B 10 245 3349307 3335.86 5290 5169 1002.5
B 3 64 636755 630.02 5290 5169 1002.5
B 15 32 498389 492.0 5290 5169 1002.5
C 7 221 1932012 1622.61 5064 5055 1187.6
C 2 16 631059 527.13 5064 5055 1187.6
C 10 22 176850 144.66 5064 5055 1187.6
D 1 52 17774440 15239.96 5051 4893 1166.0
D 7 80 1959880 1676.68 5051 4893 1166.0
D 2 250 1059488 904.47 5051 4893 1166.0

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