ASTROSAT CZTI

Data Quality Report

Orbit 20200622_A07_148T02_9000003728_level2

Creation date: 2021-01-10T10:09:01.833896
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/AS1A07_148T02_9000003728cztM0_level2_bc.evt modeM0/AS1A07_148T02_9000003728cztM0_level2_quad_clean.evt
Size (bytes)3,052,080,000941,503,680
Size2.8 GB 897.9 MB
Events in quadrant A24,537,5495,992,998
Events in quadrant B17,265,2386,105,537
Events in quadrant C15,717,3045,727,136
Events in quadrant D29,805,3585,547,202

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01878290
B01591520
C01574340
D02002140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015260
B015260
C015280
D015280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7504414261.900219%
B7504410901.452481%
C7504414431.922872%
D7504524933.322007%

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 87150 75046 93 93 0.11% 0.12%
B 87150 75047 3 3 0.00% 0.00%
C 87150 75047 9 9 0.01% 0.01%
D 87151 75048 534 534 0.61% 0.71%

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 8 192 5818057 6554.18 4148 4086 887.1
A 6 16 1832748 2061.48 4148 4086 887.1
A 0 13 747617 838.19 4148 4086 887.1
B 0 219 658753 829.12 4208 4111 789.6
B 0 190 165553 204.47 4208 4111 789.6
B 0 245 119262 145.84 4208 4111 789.6
C 3 233 363491 393.43 3936 3917 913.9
C 0 207 111817 118.06 3936 3917 913.9
C 5 112 77416 80.42 3936 3917 913.9
D 1 52 9620348 10480.9 3988 3850 917.5
D 8 195 2111181 2296.75 3988 3850 917.5
D 13 174 830692 901.16 3988 3850 917.5

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