ASTROSAT CZTI

Data Quality Report

Orbit 20170110_A02_090T02_9000000956_level2

Creation date: 2025-11-09T02:49:41.107217
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/AS1A02_090T02_9000000956cztM0_level2.fits modeM0/AS1A02_090T02_9000000956cztM0_level2_quad_clean.evt
Size (bytes)1,299,925,4401,189,909,440
Size1.2 GB 1.1 GB
Events in quadrant A7,852,0926,876,580
Events in quadrant B7,512,0926,858,952
Events in quadrant C7,792,5086,655,216
Events in quadrant D6,701,5046,136,807

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02865180
B03041490
C02846910
D03127410

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A028340
B028340
C028340
D028340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02120
B02120
C02120
D02120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13875515461.114194%
B13875926621.918434%
C13878211100.799816%
D13876319051.372844%

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 160522 138845 0 0 0.00% 0.00%
B 160522 138839 0 0 0.00% 0.00%
C 160522 138867 0 0 0.00% 0.00%
D 160522 138845 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 7529 10.94 2040 1902 514.2
A 7 110 6618 9.17 2040 1902 514.2
A 0 30 5899 7.77 2040 1902 514.2
B 2 9 6436 11.49 1985 1883 396.2
B 12 226 5222 8.43 1985 1883 396.2
B 14 254 5153 8.25 1985 1883 396.2
C 1 80 5784 7.16 2058 1902 542.2
C 1 81 5697 7.0 2058 1902 542.2
C 12 241 5428 6.5 2058 1902 542.2
D 6 231 4995 6.43 1915 1745 505.7
D 3 14 4972 6.38 1915 1745 505.7
D 7 5 4810 6.06 1915 1745 505.7

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