ASTROSAT CZTI

Data Quality Report

Orbit 20151126_P01_889T01_9000000130_level2

Creation date: 2025-10-23T19:17:55.577032
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/AS1P01_889T01_9000000130cztM0_level2.fits modeM0/AS1P01_889T01_9000000130cztM0_level2_quad_clean.evt
Size (bytes)15,477,12011,266,560
Size14.8 MB 10.7 MB
Events in quadrant A94,71861,751
Events in quadrant B92,44862,225
Events in quadrant C52,70213,393
Events in quadrant D80,30054,776

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A081830
B085680
C0166140
D076070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0400
B0400
C0400
D0400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A204100.000000%
B204120.097991%
C2041134565.899069%
D204120.097991%

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 2041 2041 0 0 0.00% 0.00%
B 2041 2041 0 0 0.00% 0.00%
C 2040 2038 0 0 0.00% 0.00%
D 2041 2041 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 89 8.41 24 23 7.9
A 0 29 84 7.77 24 23 7.9
A 15 47 76 6.75 24 23 7.9
B 2 9 69 6.84 24 23 6.7
B 10 225 65 6.25 24 23 6.7
B 3 17 64 6.1 24 23 6.7
C 12 249 40 5.37 13 13 5.0
C 3 202 40 5.37 13 13 5.0
C 12 241 39 5.17 13 13 5.0
D 6 114 65 6.04 22 21 7.3
D 6 232 63 5.77 22 21 7.3
D 3 30 63 5.77 22 21 7.3

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