ASTROSAT CZTI

Data Quality Report

Orbit 20171003_A04_055T02_9000001576_level2

Creation date: 2025-11-17T11:48:26.623574
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/AS1A04_055T02_9000001576cztM0_level2.fits modeM0/AS1A04_055T02_9000001576cztM0_level2_quad_clean.evt
Size (bytes)843,744,960824,662,080
Size804.7 MB 786.5 MB
Events in quadrant A5,037,3604,862,356
Events in quadrant B4,872,5724,841,357
Events in quadrant C5,127,8624,881,079
Events in quadrant D4,347,8224,228,551

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01550
B01550
C01550
D01550

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018320
B018320
C018320
D018320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02493350
B02490060
C01850130
D02344070

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8987461816.877406%
B8987562216.921836%
C898756580.732128%
D8987445275.037052%

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 105410 89785 0 0 0.00% 0.00%
B 105410 89859 0 0 0.00% 0.00%
C 105410 89872 0 0 0.00% 0.00%
D 105410 89798 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 4813 10.96 1315 1236 326.4
A 7 110 4198 9.08 1315 1236 326.4
A 0 30 3813 7.9 1315 1236 326.4
B 2 9 4154 11.63 1288 1231 251.4
B 3 17 3232 7.96 1288 1231 251.4
B 14 254 3229 7.95 1288 1231 251.4
C 1 81 3824 7.31 1353 1257 350.9
C 1 80 3766 7.15 1353 1257 350.9
C 12 241 3553 6.54 1353 1257 350.9
D 6 231 3172 6.16 1243 1127 331.7
D 3 14 3171 6.16 1243 1127 331.7
D 7 5 3119 6.0 1243 1127 331.7

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