ASTROSAT CZTI

Data Quality Report

Orbit 51902

Creation date: 2025-05-03T08:07:25.432673
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/AS1C09_011T05_9000006466_51902cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51902cztM0_level2_quad_clean.evt
Size (bytes)654,828,48095,022,720
Size624.5 MB 90.6 MB
Events in quadrant A7,150,503599,041
Events in quadrant B4,780,705681,870
Events in quadrant C4,797,522621,095
Events in quadrant D6,989,710505,088

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0259622
B0189792
C0189512
D0255232

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67386359.424161%
B67383775.595132%
C67382804.155536%
D6738109716.280795%

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 7863 6739 566 566 7.20% 8.40%
B 7863 6739 225 225 2.86% 3.34%
C 7863 6739 181 181 2.30% 2.69%
D 7863 6739 906 906 11.52% 13.44%

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 15 174 1322177 7713.58 680 665 171.3
A 12 3 876497 5112.18 680 665 171.3
A 4 175 850481 4960.32 680 665 171.3
B 4 171 846758 5789.69 692 668 146.1
B 12 32 562602 3845.24 692 668 146.1
B 0 213 81627 553.99 692 668 146.1
C 15 178 358632 1878.14 683 677 190.6
C 15 248 339251 1776.45 683 677 190.6
C 15 224 285342 1493.6 683 677 190.6
D 6 42 876677 4539.45 624 600 193.0
D 12 17 735895 3809.98 624 600 193.0
D 13 187 703927 3644.34 624 600 193.0

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