ASTROSAT CZTI

Data Quality Report

Orbit 20220619_A11_097T24_9000005196_level2

Creation date: 2026-01-03T09:49:58.730638
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/AS1A11_097T24_9000005196cztM0_level2.fits modeM0/AS1A11_097T24_9000005196cztM0_level2_quad_clean.evt
Size (bytes)991,272,960961,827,840
Size945.4 MB 917.3 MB
Events in quadrant A6,113,5285,900,441
Events in quadrant B5,645,1505,569,057
Events in quadrant C5,975,4065,523,406
Events in quadrant D5,004,0184,859,927

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A021720
B021720
C021720
D021720

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03800
B03800
C03800
D03800

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02410710
B03004470
C02451090
D03148610

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10614322432.113187%
B10614384938.001470%
C10614319531.839971%
D10614376977.251538%

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 144224 106074 0 0 0.00% 0.00%
B 144224 106044 0 0 0.00% 0.00%
C 144224 106127 0 0 0.00% 0.00%
D 144224 105527 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 7 110 5110 9.33 1596 1503 386.6
A 9 19 5003 9.05 1596 1503 386.6
A 0 29 4904 8.8 1596 1503 386.6
B 2 9 4930 11.95 1493 1424 293.3
B 3 80 4315 9.86 1493 1424 293.3
B 5 128 3995 8.77 1493 1424 293.3
C 1 81 4815 8.23 1576 1476 405.5
C 1 80 4731 8.03 1576 1476 405.5
C 3 202 4598 7.7 1576 1476 405.5
D 7 3 3703 6.28 1436 1308 381.5
D 10 113 3651 6.14 1436 1308 381.5
D 10 189 3599 6.0 1436 1308 381.5

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