ASTROSAT CZTI

Data Quality Report

Orbit 20190226_A05_144T02_9000002734_level2

Creation date: 2025-11-28T00:15:28.702272
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/AS1A05_144T02_9000002734cztM0_level2.fits modeM0/AS1A05_144T02_9000002734cztM0_level2_quad_clean.evt
Size (bytes)403,251,840458,611,200
Size384.6 MB 437.4 MB
Events in quadrant A2,387,0762,759,656
Events in quadrant B2,315,7022,897,755
Events in quadrant C2,415,7342,744,722
Events in quadrant D2,080,8942,476,986

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01116690
B01111750
C0901930
D01064360

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08920
B08920
C08920
D08920

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0520
B0520
C0520
D0520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4385529836.801961%
B4385530416.934215%
C438556961.587048%
D4385511492.619998%

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 49010 43802 0 0 0.00% 0.00%
B 49010 43791 0 0 0.00% 0.00%
C 49010 43850 0 0 0.00% 0.00%
D 49010 43843 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 0 29 2109 9.75 620 581 156.7
A 7 110 1942 8.68 620 581 156.7
A 15 236 1797 7.76 620 581 156.7
B 2 9 1875 10.78 612 585 119.7
B 2 8 1549 8.06 612 585 119.7
B 14 254 1512 7.75 612 585 119.7
C 12 241 1784 7.17 638 593 166.1
C 2 191 1668 6.47 638 593 166.1
C 3 126 1586 5.98 638 593 166.1
D 3 14 1572 6.49 593 538 159.4
D 10 190 1554 6.38 593 538 159.4
D 6 231 1515 6.13 593 538 159.4

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