ASTROSAT CZTI

Data Quality Report

Orbit 20200226_A07_001T01_9000003538_level2

Creation date: 2025-12-09T16:04:15.016395
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/AS1A07_001T01_9000003538cztM0_level2.fits modeM0/AS1A07_001T01_9000003538cztM0_level2_quad_clean.evt
Size (bytes)263,312,640348,776,640
Size251.1 MB 332.6 MB
Events in quadrant A1,611,6842,275,183
Events in quadrant B1,557,4782,301,602
Events in quadrant C1,582,0422,158,210
Events in quadrant D1,375,7801,980,785

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0320
B0320
C0320
D0320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0558480
B0556360
C0559160
D0638910

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05460
B05460
C05460
D05460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A268681640.610392%
B268681660.617835%
C268683151.172398%
D268683391.261724%

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 30128 26868 0 0 0.00% 0.00%
B 30128 26868 0 0 0.00% 0.00%
C 30128 26868 0 0 0.00% 0.00%
D 30128 26864 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 1599 11.43 420 397 105.2
A 7 110 1304 8.63 420 397 105.2
A 0 30 1253 8.14 420 397 105.2
B 2 9 1237 10.29 412 396 81.8
B 5 128 1050 8.0 412 396 81.8
B 2 8 1048 7.97 412 396 81.8
C 1 81 1227 7.81 417 393 106.8
C 1 80 1211 7.66 417 393 106.8
C 12 241 1111 6.72 417 393 106.8
D 3 14 1037 6.38 392 358 106.4
D 15 46 992 5.96 392 358 106.4
D 6 38 980 5.85 392 358 106.4

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