ASTROSAT CZTI

Data Quality Report

Orbit 20181211_A05_169T01_9000002558_level2

Creation date: 2025-11-26T05:25:12.118002
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_169T01_9000002558cztM0_level2.fits modeM0/AS1A05_169T01_9000002558cztM0_level2_quad_clean.evt
Size (bytes)978,557,760943,148,160
Size933.2 MB 899.5 MB
Events in quadrant A6,105,4005,797,039
Events in quadrant B5,876,3765,741,735
Events in quadrant C5,858,3845,334,044
Events in quadrant D5,101,4784,996,722

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019900
B019900
C019900
D019900

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02039080
B02060690
C02064730
D02185150

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01800
B01800
C01800
D01800

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9767310061.029967%
B9767412991.329934%
C9767416101.648340%
D9767315641.601261%

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 114928 97668 0 0 0.00% 0.00%
B 114928 97668 0 0 0.00% 0.00%
C 114928 97666 0 0 0.00% 0.00%
D 114928 97668 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 5610 10.5 1586 1490 392.3
A 7 110 4959 8.84 1586 1490 392.3
A 0 30 4463 7.58 1586 1490 392.3
B 2 9 4655 10.51 1548 1479 302.2
B 2 8 3895 7.99 1548 1479 302.2
B 5 225 3748 7.51 1548 1479 302.2
C 1 80 4369 7.28 1547 1443 402.1
C 1 81 4337 7.2 1547 1443 402.1
C 12 241 4111 6.64 1547 1443 402.1
D 6 231 3702 6.15 1455 1326 386.3
D 7 3 3609 5.91 1455 1326 386.3
D 3 14 3587 5.85 1455 1326 386.3

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