ASTROSAT CZTI

Data Quality Report

Orbit 20200919_A09_134T01_9000003896_level2

Creation date: 2025-12-15T06:27:42.572933
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/AS1A09_134T01_9000003896cztM0_level2.fits modeM0/AS1A09_134T01_9000003896cztM0_level2_quad_clean.evt
Size (bytes)1,809,123,8401,380,144,960
Size1.7 GB 1.3 GB
Events in quadrant A8,272,3344,881,648
Events in quadrant B10,657,8267,521,533
Events in quadrant C12,184,0108,765,558
Events in quadrant D10,208,7627,223,789

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A038820
B039880
C039880
D039880

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03350
B03360
C03360
D03360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09577840
B07317570
C04159710
D06251980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1956219138546.715332%
B1956214540523.210698%
C19562134891.783551%
D195620174358.912688%

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 233824 185689 0 0 0.00% 0.00%
B 233824 192857 0 0 0.00% 0.00%
C 233824 195604 0 0 0.00% 0.00%
D 233824 195397 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 7055 9.65 2156 2028 520.9
A 7 110 6620 8.82 2156 2028 520.9
A 9 19 6375 8.35 2156 2028 520.9
B 2 9 8492 10.62 2825 2712 544.0
B 5 128 7091 8.05 2825 2712 544.0
B 2 8 6896 7.69 2825 2712 544.0
C 9 209 8397 6.69 3223 3030 802.6
C 12 241 8388 6.68 3223 3030 802.6
C 9 233 8191 6.43 3223 3030 802.6
D 10 189 7252 6.0 2920 2673 763.3
D 6 231 7177 5.9 2920 2673 763.3
D 6 67 7141 5.85 2920 2673 763.3

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