ASTROSAT CZTI

Data Quality Report

Orbit 31887

Creation date: 2024-06-27T20:33:51.808779
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_042T01_9000004650_31887cztM0_level2.evt modeM0/AS1T04_042T01_9000004650_31887cztM0_level2_quad_clean.evt
Size (bytes)437,204,16094,291,200
Size417.0 MB 89.9 MB
Events in quadrant A2,516,278651,145
Events in quadrant B3,809,183640,943
Events in quadrant C2,714,876623,447
Events in quadrant D3,879,632607,929

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010813233
B015123351
C011393238
D015231381

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0960
B0960
C0960
D0993

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4732931.965342%
B47321503.169907%
C47332114.458060%
D47331192.514262%

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 6142 4741 0 0 0.00% 0.00%
B 6133 4738 3 3 0.05% 0.06%
C 6140 4740 52 52 0.85% 1.10%
D 6144 4739 42 42 0.68% 0.89%

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 13 254 7511 53.09 651 641 129.4
A 3 137 6176 42.78 651 641 129.4
A 13 6 5829 40.09 651 641 129.4
B 6 159 1214154 10169.05 632 619 119.3
B 0 229 65076 540.13 632 619 119.3
B 0 183 18645 151.05 632 619 119.3
C 0 10 144572 1023.92 606 611 140.6
C 14 238 99316 702.04 606 611 140.6
C 3 233 67895 478.56 606 611 140.6
D 8 195 941441 6402.03 624 606 147.0
D 12 79 423720 2879.13 624 606 147.0
D 13 249 107980 730.64 624 606 147.0

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