ASTROSAT CZTI

Data Quality Report

Orbit 20181118_A05_143T01_9000002524_level2

Creation date: 2025-11-25T23:02:19.821649
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_143T01_9000002524cztM0_level2.fits modeM0/AS1A05_143T01_9000002524cztM0_level2_quad_clean.evt
Size (bytes)954,610,560854,596,800
Size910.4 MB 815.0 MB
Events in quadrant A5,857,9285,059,218
Events in quadrant B5,607,9224,965,844
Events in quadrant C5,798,1064,812,184
Events in quadrant D4,846,7604,248,348

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01750
B01750
C01750
D01750

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020200
B020200
C020200
D020200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02143990
B02327850
C02315810
D03034220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9914421382.156459%
B9914432593.287138%
C9914416851.699548%
D9914480168.085209%

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 116540 99130 0 0 0.00% 0.00%
B 116540 99032 0 0 0.00% 0.00%
C 116540 99145 0 0 0.00% 0.00%
D 116540 99020 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 5404 10.67 1522 1426 372.7
A 7 110 4779 9.0 1522 1426 372.7
A 9 19 4439 8.09 1522 1426 372.7
B 2 9 4631 10.91 1483 1410 295.2
B 2 8 3934 8.55 1483 1410 295.2
B 3 17 3793 8.07 1483 1410 295.2
C 12 241 3943 6.41 1532 1432 391.6
C 2 191 3906 6.32 1532 1432 391.6
C 3 126 3893 6.29 1532 1432 391.6
D 3 14 3499 6.14 1384 1261 364.6
D 10 189 3445 5.99 1384 1261 364.6
D 6 231 3433 5.96 1384 1261 364.6

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