ASTROSAT CZTI

Data Quality Report

Orbit 00291

Creation date: 2024-06-27T13:58:47.270023
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/AS1P01_126T02_9000000034_00291cztM0_level2.evt modeM0/AS1P01_126T02_9000000034_00291cztM0_level2_quad_clean.evt
Size (bytes)1,003,000,32051,396,480
Size956.5 MB 49.0 MB
Events in quadrant A10,287,803282,990
Events in quadrant B6,759,967294,432
Events in quadrant C6,070,154286,990
Events in quadrant D6,871,453283,210

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0346232
B0242731
C0222221
D0246451

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5842250.427936%
B584280.136939%
C584270.119822%
D58421412.413557%

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 7547 5843 1347 1347 17.85% 23.05%
B 7547 5843 99 99 1.31% 1.69%
C 7547 5843 52 52 0.69% 0.89%
D 7547 5843 452 452 5.99% 7.74%

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 15 127 3550697 9295.91 1724 1710 381.8
A 13 50 43203 108.68 1724 1710 381.8
A 11 242 15138 35.17 1724 1710 381.8
B 11 51 29823 69.31 1728 1743 405.1
B 5 46 27932 64.64 1728 1743 405.1
B 0 183 22215 50.53 1728 1743 405.1
C 1 192 42685 96.12 1523 1574 427.7
C 3 159 15477 32.51 1523 1574 427.7
C 7 255 15004 31.4 1523 1574 427.7
D 2 253 714899 1533.51 1473 1532 465.2
D 10 62 181444 386.75 1473 1532 465.2
D 13 216 170176 362.53 1473 1532 465.2

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