ASTROSAT CZTI

Data Quality Report

Orbit 20171021_A04_042T01_9000001630_level2

Creation date: 2025-11-17T21:58:23.796765
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/AS1A04_042T01_9000001630cztM0_level2.fits modeM0/AS1A04_042T01_9000001630cztM0_level2_quad_clean.evt
Size (bytes)393,552,000350,936,640
Size375.3 MB 334.7 MB
Events in quadrant A2,269,7561,900,080
Events in quadrant B2,280,0782,020,608
Events in quadrant C2,374,9842,001,150
Events in quadrant D1,970,4141,685,152

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08960
B08980
C08980
D08980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0470
B0470
C0470
D0470

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420840
B01164250
C0901480
D01474990

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A43939460310.475887%
B4396925965.904160%
C440013120.709075%
D4398226456.013824%

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 49127 43926 0 0 0.00% 0.00%
B 49127 44010 0 0 0.00% 0.00%
C 49127 44039 0 0 0.00% 0.00%
D 49127 44026 0 0 0.00% 0.00%

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 14 188 2297 11.5 589 548 152.0
A 0 29 2195 10.83 589 548 152.0
A 14 204 1939 9.15 589 548 152.0
B 2 9 2100 12.39 601 570 123.5
B 3 17 1574 8.13 601 570 123.5
B 5 225 1534 7.81 601 570 123.5
C 12 241 1703 6.77 627 580 165.8
C 9 233 1602 6.16 627 580 165.8
C 2 191 1585 6.06 627 580 165.8
D 3 14 1591 7.07 562 509 153.0
D 3 31 1441 6.09 562 509 153.0
D 6 231 1430 6.02 562 509 153.0

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