ASTROSAT CZTI

Data Quality Report

Orbit 20180308_A04_216T01_9000001968_level2

Creation date: 2025-11-20T01:37:43.189098
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_216T01_9000001968cztM0_level2.fits modeM0/AS1A04_216T01_9000001968cztM0_level2_quad_clean.evt
Size (bytes)1,108,221,1201,154,698,560
Size1.0 GB 1.1 GB
Events in quadrant A6,743,6167,184,376
Events in quadrant B6,212,0386,528,282
Events in quadrant C6,739,1966,899,229
Events in quadrant D5,706,3006,205,267

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02525560
B03326080
C02454400
D02916240

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02050
B02050
C02050
D02050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A024220
B024220
C024220
D024220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11901519341.625005%
B1190151323311.118767%
C11901513851.163719%
D11901537343.137420%

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 139200 119011 0 0 0.00% 0.00%
B 139200 117895 0 0 0.00% 0.00%
C 139200 119015 0 0 0.00% 0.00%
D 139200 119010 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 6560 11.34 1756 1647 433.4
A 7 110 5596 9.11 1756 1647 433.4
A 0 30 5060 7.87 1756 1647 433.4
B 2 9 5418 12.2 1637 1566 315.8
B 3 17 4127 8.11 1637 1566 315.8
B 14 254 4072 7.94 1637 1566 315.8
C 12 241 4886 7.04 1780 1666 457.1
C 2 191 4605 6.43 1780 1666 457.1
C 7 111 4464 6.12 1780 1666 457.1
D 3 14 4286 6.47 1627 1481 433.7
D 6 231 4099 6.04 1627 1481 433.7
D 10 189 4020 5.85 1627 1481 433.7

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