ASTROSAT CZTI

Data Quality Report

Orbit 20974

Creation date: 2024-06-27T18:21:57.916874
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/AS1T03_131T01_9000003090_20974cztM0_level2.evt modeM0/AS1T03_131T01_9000003090_20974cztM0_level2_quad_clean.evt
Size (bytes)1,564,992,000267,814,080
Size1.5 GB 255.4 MB
Events in quadrant A10,466,7881,679,581
Events in quadrant B11,069,6701,730,960
Events in quadrant C10,773,6221,667,892
Events in quadrant D13,648,3501,566,980

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04320
B04320
C04320
D04320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0540
B0550
C0550
D0550

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0439845
B0455025
C0443955
D0544035

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A213001070.502347%
B213001630.765258%
C213002020.948357%
D213007563.549296%

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 26465 21304 4 4 0.02% 0.02%
B 26465 21304 20 20 0.08% 0.09%
C 26465 21304 0 0 0.00% 0.00%
D 26465 21303 799 799 3.02% 3.75%

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 0 226 23722 38.96 2723 2675 540.2
A 3 137 21742 35.29 2723 2675 540.2
A 12 194 19466 31.08 2723 2675 540.2
B 3 64 129638 251.03 2746 2681 505.7
B 12 111 60282 113.89 2746 2681 505.7
B 0 189 59156 111.67 2746 2681 505.7
C 14 238 420317 687.62 2642 2666 607.4
C 7 247 34201 51.92 2642 2666 607.4
C 9 54 20740 29.76 2642 2666 607.4
D 1 52 2941253 4662.32 2627 2556 630.3
D 9 1 421133 664.08 2627 2556 630.3
D 15 0 181317 283.61 2627 2556 630.3

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