ASTROSAT CZTI

Data Quality Report

Orbit 20210726_A10_119T01_9000004590_level2

Creation date: 2021-07-29T13:18:56.968436
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/AS1A10_119T01_9000004590cztM0_level2_bc.evt modeM0/AS1A10_119T01_9000004590cztM0_level2_quad_clean.evt
Size (bytes)2,585,125,440560,459,520
Size2.4 GB 534.5 MB
Events in quadrant A21,030,7303,312,574
Events in quadrant B23,477,6263,647,014
Events in quadrant C11,790,5233,532,023
Events in quadrant D18,895,5303,357,803

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0700
B0700
C0690
D0700

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01501330
B01420100
C01028930
D01229120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09280
B09260
C09260
D09250

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A45478819318.015304%
B4539813192.905414%
C4555010962.406147%
D4559817483.833501%

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 65041 45851 342 342 0.53% 0.75%
B 65041 45764 17 17 0.03% 0.04%
C 65041 45920 29 29 0.04% 0.06%
D 65041 45973 437 437 0.67% 0.95%

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 0 13 12228098 25032.15 2266 2228 488.4
A 13 254 74838 148.67 2266 2228 488.4
A 13 170 47907 93.53 2266 2228 488.4
B 6 159 12175029 25602.21 2522 2465 475.4
B 4 80 549156 1149.84 2522 2465 475.4
B 5 172 378048 789.95 2522 2465 475.4
C 3 233 1274493 2237.52 2414 2410 568.5
C 0 10 865704 1518.49 2414 2410 568.5
C 2 114 86347 147.64 2414 2410 568.5
D 8 195 3901201 7139.83 2417 2340 546.1
D 12 79 3469536 6349.34 2417 2340 546.1
D 12 233 687265 1254.28 2417 2340 546.1

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